*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. 6.
Nematus diaphanus Eversman, 1847 (syn. by Benson, 1958. Roy. Ent.

Soc. Lond., Handb. Ident. Brit. Ins. 6: 237). moerens (Foerster). Host: Gramineae. * nevadensis Marlatt. Nev. Pachynematus nevadensis Marlatt, 1896. U. S. Dept. Agr. Div. Ent.

Tech. Ser. 3: 110. 8.
*obductus (Hartig). Northern U. S., Canada; Holarctic.

Nematus obductus Hartig, 1837. Fam. Blatt. und Holzwesp., p. 201. 4, 8.
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, G. 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. 8. 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. falvicrus 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, 187i. Hym. Scand., v. 1, p. 146. .. 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. . Nematus mendicus Walsh, 1866 (syn. by Benson, 1962, loc. cit. supra,

p. 405). * reticulatus Holmgren. Labrador, N. H., Man., N. W. T., Alaska; Circum

polar. Host: Vaccinium. Nematus reticulatus Holmgren, 1883. Ent. Tidskr. 4: 143. $. 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.

Pontania deminuta MacGillivray, 1919 (syn. by Benson, 1960a, loc. cit.

Genus PONTANIA 0. Costa ( = Nematus subgenus Pontania O. Costa of Catalog, pp. 46–48) Taxonomy: Benson, 1960a. Brit. Mus. (Nat. Hist.) Bul. Ent. 8: 367

384.-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, Switzer

land. 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.

, p. 377

supra, p. 377). *arctophilae Benson. Man. Host: Ovip. on Salix arctophila. Pontania arctophilae Benson, 1960. Brit. Mus. (Nat. Hist.) Bul. Ent. 8:

373. 9. *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, Switzer

land. 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. . 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 Pale

arctic lit.
Nematus dolichurus Thomson, 1871. Hym. Scand. 1: 164. 4, 8.

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. 4.
neradensis 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 Holm-

gren.
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. 4.
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 0. Costa, p. 48.

*acutiserra Lindqvist. Man.; Holarctic.

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

Distribution: Benson, 1962, loc. cit. supra, p. 403.
acuminata (Marlatt). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). agama (Rohwer). Transf. from Nematus subg. Pontania 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 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). *coriacea (Benson). Alta.; Holarctic. Nematus (Pontania) coriaceus Benson, 1953. Ent. Mo. Mag. 89: 150.

$, . Taxonomy: Benson, 1960b, loc. cit. supra, p. 60. cressoni (Marlatt). Transf from Nematus subg. Pontania 0. 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 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). leucostoma (Rohwer). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). mariana (Ross). Transf. from Nematus subg. Pontania 0. Costa (teste Ben

son, 1960b, loc. cit. supra, p. 60). marlatti (Ross). Transf. from Nematus subg. Pontania 0. Costa (teste Ben

son, 1960b, loc. cit. supra, p. 60). melanosoma (Rohwer). Transf. from Nematus subg. Pontania 0. Costa

(teste Benson, 1960b, loc. cit. supra, p. 60). mellina (Cresson). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). nevadensis (Cresson). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). pallicornis (Norton). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). parva (Cresson). Transf. from Nematus subg. Pontania 0. Costa (teste Ben

son, 1960b, loc. cit. supra, p. 60). pectoralis (Marlatt). Transf. from Nematus subg. Pontania 0. 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 0. Costa (teste Benson,

1960b, loc. cit. supra, p. 60). popuella (Ross). Transf. from Nematus subg. Pontania 0. Costa (teste Ben

son, 1960b, loc. cit. supra, p. 60). populi (Marlatt). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). robusta (Marlatt). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60).

.

.

Salia spp.

terminalis (Marlatt). Transf. from Nematus subg. Pontania 0. Costa (teste

Benson, 1960b, loc. cit. supra, p. 60). tundra (Kincaid). Transf. from Nematus subg. Pontania 0. 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 0. Costa. atra (Jurine). Que., Ont., Alta.; Europe. Hosts: Feeding in stems of

Pteronus ater Jurine, 1807. Nouv. Méth. Class. Hym., pl. 6, fig. 6b. f.

Euura nigra Provancher (syn. by Benson, 1962, loc. cit. supra, p. 403).
borealis (Marlatt). Transf. to Phyllocolpa Benson.
bruneri (Marlatt). Transf. to Pontania 0. Costa.
californica (Marlatt). Transf. to Pontania 0. Costa.
hoppingi Ross. Transf. to Pontania 0. Costa.
hospes (Walsh). Transf. to Pontania 0. 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. 4, G.

Biology: Benson, 1962, loc. cit. supra, p. 403.
*mucronata (Hartig). Man., Alaska; Circumboreal. Hosts: Salix spp., feed-

ing inside buds. Nematus (Cryptocampus) mucronatus Hartig, 1837. Fam. der Blatt.

und Holzwesp., p. 223. 9, .
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 0. Costa.
salicis pisum (Thomas). Transf. to Pontania 0. 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 0. 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. 4. 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).