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*freyi Lindqvist. N. W. T., Yukon; Circumpolar.

Pachynematus freyi Lindqvist, 1949. Not. Ent. 28: 81. 9.

*kirbyi (Dahlbom). Holarctic. Host: Carex.

Nematus kirbyi Dahlbom, 1835, Clavis Hym. Syst., p. 40. 3.

Nematus diaphanus Eversman, 1847 (syn. by Benson, 1958. Roy. Ent.
Soc. Lond., Handb. Ident. Brit. Îns. 6: 237).

moerens (Foerster). Host: Gramineae.

*nevadensis Marlatt. Nev.

Pachynematus nevadensis Marlatt, 1896. U. S. Dept. Agr. Div. Ent.
Tech. Ser. 3: 110. .

*obductus (Hartig). Northern U. S., Canada; Holarctic.

Nematus obductus Hartig, 1837. Fam. Blatt. und Holzwesp., p. 201. 9, 3. Nematus palliventris Cresson, 1880 (syn. by Benson, 1962, loc. cit. supra, p. 405).

palliventris (Cresson). Syn. of obductus (Hartig).

*parvilabris (Thomson). N. W. T.; prob. Circumpolar.

Nematus parvilabris Thomson, 1862. Svenska Vetensk. Akad. Ofvers.
Förh. 19: 638. 9, d.

Taxonomy: Benson, 1962, loc. cit. supra, p. 405.

*rumicis (Linnaeus). Man., Alaska: Circumboreal. Host: Rumex. Tenthredo rumicis Linnaeus 1758. Syst. Nat., ed. 10, v. 1, p. 559.

smithae Ross. N. H.; prob. Circumboreal.

*vagus (Fabricius). Transcontinental in Northern U. S. and Canada; Holarctic. Hosts: Carex, Salix.

Tenthredo vaga Fabricius, 1781. Spec. Ins., v. 1, p. 415.

Pachynematus corticosus MacGillivray, 1901 (syn. by Benson, 1962, loc. cit. supra, p. 405).

Genus CROESUS Leach, p. 42

Taxonomy: Benson, 1963. Ent. Tidskr. 84: 25. varus (Villaret). Host: Alnus.

NEMATUS subgenus PTERONIDEA Rohwer, pp. 42-46

*borealis Marlatt. Greenland.

Nematus borealis Marlatt in Fox, 1892. Acad. Nat. Sci. Phila. Proc. 44: 133. 6.

*crassus (Fallén). N. W. T.; Eurasia. Hosts: Betula, Populus, Salix, Rumex. Tenthredo crassa Fallén, 1808. Svenska Vetensk. Akad. Handl. 29: 106. Distribution: Benson, 1962, loc. cit. supra, p. 404.

fulvicrus Provancher

Nematus salicis Ashmead, change to Messa salicis.

*Nematus salicicola Dalla Torre, 1894. Cat. Hym., v. 1, p. 252. N. name for salicis Ashm.

*jugicola Thomson. Man.; N. Europe. Host: Salix sp.

Nematus jugicola Thomson, 1871. Hym. Scand., v. 1, p. 146. 9.

mendicus Walsh. Syn. of oligospilus Foerster.

*oligospilus Foerster. Transcont. in N. Amer.; Holarctic. Host: Salix sp. Nematus oligospilus Foerster, 1854. Naturh. Ver. Preuss. Rheinl. Verh. 11: 284. 9.

Nematus mendicus Walsh, 1866 (syn. by Benson, 1962, loc. cit. supra, p. 405).

*reticulatus Holmgren. Labrador, N. H., Man., N. W. T., Alaska; Circumpolar. Host: Vaccinium.

Nematus reticulatus Holmgren, 1883. Ent. Tidskr. 4: 143. 9.

Pontania glinka Kincaid, 1900 (syn. by Benson, 1962, loc. cit. supra, p.

Pontania popofiana Kincaid, 1900 (syn. by Benson, 1962, loc. cit. supra, p. 404).

salicisodoratus Dyar. Wis.

ventralis Say.

Transf. Nematus latus Cresson to Unplaced Nematinae, p. 54.
Morphology: Judd, 1954. Ent. Soc. Ont. Ann. Rpt. 85: 32-39.

*villosus Thomson. N. W. T.; N. Europe.

Nematus villosus Thomson, 1862. Svenska Vetensk. Akad. Ofvers. Förh. 19: 629. 9.

Distribution: Benson, 1962, loc. cit. supra, p. 404.

Genus PONTANIA O. Costa

(Nematus subgenus Pontania O. Costa of Catalog, pp. 46-48)

Taxonomy: Benson, 1960a. Brit. Mus. (Nat. Hist.) Bul. Ent. 8: 367384.-Benson, 1960b. Ent. Mo. Mag. 96: 60.-Benson, 1962, loc. cit. supra, pp. 403-404 (Holarctic spp.).

acuminata (Marlatt). Transf. to Phyllocolpa Benson.

agamus (Rohwer). Transf. to Phyllocolpa Benson.

amentivorus (Rohwer). Transf. to Amauronematus Konow.

arctica (MacGillivray). Alaska, Yukon, N. W. T., Man.; Lapland, Switzerland. Host: Leaf galls on Salix reticulata. Transf. from Euura (teste Benson, 1960a, loc. cit. supra, p. 377).

Euura abortiva MacGillivray, 1919 (syn. by Benson, 1960a, loc. cit. supra, p. 377).

Pontania delicatula MacGillivray, 1919 (syn. by Benson, 1960a, loc. cit. supra, p. 377).

Pontania deminuta MacGillivray, 1919 (syn. by Benson, 1960a, loc. cit. supra, p. 377).

*arctophilae Benson. Man. Host: Ovip. on Salix arctophila.

Pontania arctophilae Benson, 1960. Brit. Mus. (Nat. Hist.) Bul. Ent. 8: 373. .

*beckettae Benson. Man. Hosts: Galls on Salix planifolia, S. discolor, S. glauca, S. reticulata.

Pontania beckettae Benson, 1960. Brit. Mus. (Nat. Hist.) Bul. Ent. 8: 378. 9.

bozemani (Cooley). Transf. to Phyllocolpa Benson.

bruneri Marlatt. Transf. from Euura Newman (teste Benson, 1960a, loc. cit. supra, p. 382).

californica Marlatt. Transf. from Euura Newman (teste Benson, 1960a, loc. cit. supra, p. 382).

*crassipes (Thomson). Alaska, Yukon, N. W. T., Man.; N. Europe, Switzerland. Hosts: Galls on Salix herbacea, S. polaris, S. arctica, S. retusa, S. arbuscula, S. myrsinites, S. lapponum.

Nematus crassipes Thomson, 1871. Hym. Scand. 1: 162. 9.

Pontania ora Kincaid, 1920 (syn. by Benson, 1960a, loc. cit. supra, p. 379).

Pontania atrata MacGillivray, 1919 (syn. by Benson, 1960a, loc. cit. supra, p. 379).

Pontania lorata MacGillivray, 1919 (syn. by Benson, 1960a, loc. cit. supra, p. 379).

cressoni (Marlatt). Transf. to Phyllocolpa Benson.

delicatulus (MacGillivray). Syn. of arctica (MacGillivray).

deminutus (MacGillivray). Syn. of arctica (MacGillivray).

destrictus (MacGillivray). Syn. of Phyllocolpa excavata (Marlatt).

*dolichura (Thomson). Man.; N. Europe, Austria, Switzerland. Host: Galls on Salix planifolia; many other spp. of Salix recorded in Palearctic lit.

Nematus dolichurus Thomson, 1871. Hym. Scand. 1: 164. 9, 3.
Distribution: Benson, 1962, loc. cit. supra, p. 404.

glinka (Kincaid). Syn. of Nematus subg. Pteronidea reticulatus Holmgren. hoppingi (Ross). Transf. from Euura Newman (teste Benson, 1960a, loc. cit. supra, p. 382).

hospes (Walsh). Transf. from Euura Newman (teste Benson, 1960a, loc. cit. supra, p. 382).

hyalinus (Norton). Syn. of proxima (Lepeletier).

leavitti (Rohwer). Transf. to Phyllocolpa Benson.

leucostoma (Rohwer). Transf. to Phyllocolpa Benson.

marianus (Ross). Transf. to Phyllocolpa Benson.

marlatti (Ross). Transf. to Phyllocolpa Benson.

megacephalus (Rohwer). Syn. of Phyllocolpa excavata (Marlatt).

melanosoma (Rohwer). Transf. to Phyllocolpa Benson.

mellinus Cresson. Transf. to Phyllocolpa Benson.

*myrtillifoliae Benson. Man. Host: on Salix myrtillifolia.

Pontania myrtillifoliae Benson, 1960. Brit. Mus. (Nat. Hist.) Bul. Ent. 8: 372. 9.

nevadensis Cresson. Transf. to Phyllocolpa Benson. pallicornis (Norton). Transf. to Phyllocolpa Benson. parvus Cresson. Transf. to Phyllocolpa Benson.

pectoralis (Marlatt). Transf. to Phyllocolpa Benson.

pepii (Ross). Transf. to Phyllocolpa Benson.

popofianus (Kincaid). Syn. of Nematus subg. Pteronidea reticulatus Holmgren.

popuellus (Ross). Transf. to Phyllocolpa Benson.

populi (Marlatt). Transf. to Phyllocolpa Benson.

*proxima (Lepeletier). Northeastern; Europe. Host: Salix fragilis. Nematus proximus Lepeletier, 1823. Monog. Tenthred., p. 67. 9. Messa hyalina Norton, 1864 (syn. by Benson, 1960a loc. cit. supra, p. 382).

quadrifasciatus (MacGillivray). Syn. of Amauronematus fallax (Lepeletier). resinicola Marlatt. Transf. from Euura (teste Benson, 1960a, loc. cit. supra, p. 382).

robustus (Marlatt). Transf. to Phyllocolpa Benson.

salicispisum (Thomas). Transf. from Euura Newman (teste Benson, 1960a, loc. cit. supra, p. 382).

terminalis (Marlatt). Transf. to Phyllocolpa Benson.

tundra (Kincaid). Transf. to Phyllocolpa Benson.

*Genus PHYLLOCOLPA Benson

Phyllocolpa Benson, 1960b. Ent. Mo. Mag. 96: 60.

Type: Nematus leucapsis Tischbein. Orig. desig. (Equals Sect.
A of Pontania in Benson, 1960a. Brit. Mus. (Nat. Hist.)
Bul. Ent. 8: 380-381.)

Place in Nematini after Nematus subg. Pontania O. Costa, p. 48.

*acutiserra Lindqvist. Man.; Holarctic.

Pontania acutiserra Lindqvist, 1949 (1948). Not. Ent. 28: 66. ?, ¿. Taxonomy: Benson, 1960b, loc. cit. supra, p. 60.

Distribution: Benson, 1962, loc. cit. supra, p. 403.

acuminata (Marlatt). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

agama (Rohwer). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

borealis (Marlatt). N. Y. Transf. from Euura Newman (teste Benson, 1960b, loc. cit. supra, p. 60).

bozemani (Cooley). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

*coriacea (Benson). Alta.; Holarctic.

Nematus (Pontania) coriaceus Benson, 1953. Ent. Mo. Mag. 89: 150. , 3.

Taxonomy: Benson, 1960b, loc. cit. supra, p. 60.

cressoni (Marlatt). Transf from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

excavata Marlatt. Colo., Calif., Alaska; Holarctic.

Pontania megacephala Rohwer, 1908 (syn. by Benson, 1960a, loc. cit. supra, p. 380).

Pontania destricta MacGillivray, 1923 (syn. by Benson, 1960a, loc. cit. supra, p. 380).

Taxonomy: Benson, 1960b, loc. cit. supra, p. 60.

leavitti (Rohwer). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

leucostoma (Rohwer). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

mariana (Ross). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

marlatti (Ross). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

melanosoma (Rohwer). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

mellina (Cresson). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

nevadensis (Cresson). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

pallicornis (Norton). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

parva (Cresson). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

pectoralis (Marlatt). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

peninsularis Kincaid. Transf. from Amauronematus Konow (teste Benson, 1960a, loc. cit. supra, p. 382; Benson 1960b, loc. cit. supra, p. 60). pepii (Ross). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

popuella (Ross). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

populi (Marlatt). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

robusta (Marlatt). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

terminalis (Marlatt). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

tundra (Kincaid). Transf. from Nematus subg. Pontania O. Costa (teste Benson, 1960b, loc. cit. supra, p. 60).

Genus EUURA Newman, pp. 48-51

Taxonomy and Distribution: Benson, 1962, loc. cit. supra, pp. 402-403. abortiva MacGillivray. Syn. of Pontania arctica (MacGillivray).

arctica MacGillivray. Transf. to Pontania O. Costa.

*atra (Jurine). Que., Ont., Alta.; Europe. Hosts: Feeding in stems of Salix spp.

Pteronus ater Jurine, 1807. Nouv. Méth. Class. Hym., pl. 6, fig. 6b. 9. Euura nigra Provancher (syn. by Benson, 1962, loc. cit. supra, p. 403). borealis (Marlatt). Transf. to Phyllocolpa Benson.

bruneri (Marlatt). Transf. to Pontania O. Costa.

californica (Marlatt). Transf. to Pontania O. Costa. hoppingi Ross. Transf. to Pontania O. Costa.

hospes (Walsh). Transf. to Pontania O. Costa.

insularis Kincaid. Syn. of mucronata (Hartig).

*lanatae Malaise. Man., Alta.; Lapland. Hosts: Feed inside buds of Salix calcicola and S. sp.

Euura lanatae Malaise, 1920. Ent. Tidskr. 40; 105. ?, 3.

Biology: Benson, 1962, loc. cit. supra, p. 403.

*mucronata (Hartig). Man., Alaska; Circumboreal. Hosts: Salix spp., feeding inside buds.

Nematus (Cryptocampus) mucronatus Hartig, 1837. Fam. der Blatt. und Holzwesp., p. 223. f, ô.

Euura insularis Kincaid (syn. by Benson, 1962, loc. cit. supra, p. 402). nigra Provancher. Syn. of atra (Jurine).

ora Kincaid. Syn. of Pontania crassipes (Thomson).

resinicola (Marlatt). Transf. to Pontania O. Costa.

salicispisum (Thomas). Transf. to Pontania O. Costa.

Genus AMAURONEMATUS Konow, pp. 51-53

Taxonomy and Distribution: Benson, 1962, loc. cit. supra, pp. 396-402 (Holarctic spp.).

*abnormis (Holmgren). N. W. T., Alaska; Circumpolar.

Nematus abnormis Holmgren, 1883. Ent. Tidskr. 4: 148. 9.

Amauronematus aulatus MacGillivray, 1919 (syn. by Benson, 1962, loc. cit. supra, p. 401).

amentivorus (Rohwer). Trans. from Nematus subg. Pontania O. Costa, (teste Benson, 1960, loc. cit. supra, p. 381).

amentorum (Foerster). Greenland; Circumboreal. Host: Catkins of Salix

spp.

Nematus amentorum Foerster, 1854. Naturh. Ver. Preuss. Rheinl. Verh. 11: 337. 9.

Nematus suavis Ruthe, 1859 (syn. by Benson, 1962, loc. cit. supra, p. 396). *arcticola (Dalla Torre). N. W. T., Alaska; Arctic Europe and Siberia. Nematus arcticus Thomson, 1871. Hym. Scand., v. 1, p. 134. 9. Preocc. Nematus arcticola Dalla Torre, 1894. Cat. Hym., v. 1, p. 207. N. name. Amauronematus arcticola Enslin, 1915. Deut. Ent. Ztschr. Beih., p. 389. N. name.

Taxonomy: Benson, 1962, loc. cit. supra, p. 398.

atrata (MacGillivray). Syn. of Pontania crassipes (Thomson).

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