18 HYMENOPTERA OF AMERICA NORTH OF MEXICO 



idiota (Norton). 



Taxonomy: Nielson, 1958, loc. cit. supra, pp. 229-234. 



*Iativentris (Thomson). Man., N.W.T.; Circumpolar. 



ISeniatus lativentris Thomson, 1871. Hyn. Scand., v. 1, p. 99. ?, $. 



Distribution: Benson, 1962, loc. cit. supra, p. 395. 



*leechi Wong and Ross. Mont., B. C, Wash. Host: Larix occidentalis. 

 Pristiphora leechi Wong and Ross, 1960. Canad. Ent. 92: 193. $, $. 



*leucostoma (Lindqvist). Man., N.W.T.; Lapland. Host: Salix sp. 



Lygaeoneniatus ( Lygaeophora) leucostonia Lindqvist, 1952. Not. Ent. 



32: 108. 9, $. 

 Taxonomy: Benson, 1962, loc. cit. supra, p. 394. 



pallipes Lepeletier. Valid name for rufipes of Catalog; refs. and syn. under 

 rufipes Lepeletier. 

 Nomenclature: Benson, 1962, loc. cit. supra, p. 394. 



*paloma Wong and Ross. 111. 



Pristiphora paloma Wong and Ross, 1960. Canad. Ent. 92: 196. 9. 



*parbcta Wong and Ross. Man. 



Pristiphora parbcta Wong and Ross, 1960. Canad. Ent. 92: 198. $. 



*pseudocoactuIa (Lindqvist). Man.; prob. Circumpolar. 



Lygaeonematus (Lygaeoneniatus) pseudocoactulus Lindqvist, 1952. Not. 



Ent. 32: 115. 9, $. 

 Taxonomy: Benson, 1962, loc. cit. supra, p. 395. 



*reuteri (Lindqvist). Man.; prob. Circumpolar. Host: Salix sp. 



* Lygaeonematus arcticola Enslin, 1916. Deut. Ent. Ztschr. Beih., p. 



514. 9, S- Preocc. 

 Lygaeonematus (^Lygaeophora) reuteri Lindqvist, 1960. Not. Ent. 40: 



33. 9, $. 

 Taxonomy: Benson, 1962, loc. cit. supra, p. 395. 



rufipes Lepeletier, of Catalog. Valid name, pallipes Lepeletier. 



*serrula Wong and Ross. Calif. 



Pristiphora serrula Wong and Ross, 1960. Canad. Ent. 92: 196. 9. 



*staudingeri (Ruthe). Man.; Circumpolar. Host: Salix sp. 



Nematus slaudingeri Ruthe, 1859. Stett. Ent. Ztg. 20: 306. 9, $. 

 Distribution: Benson, 1962, loc. cit. supra, p. 394. 



*valvangula Wong and Ross. ? N. Y. 



Pristiphora valvangula Wong and Ross, 1960. Canad. Ent. 92: 194. $. 



*venatta Wong and Ross. Idaho. 



Pristiphora venatta Wong and Ross, 1960. Canad. Ent. 196. 9. 



Winnipeg (Norton). Syn. of coaclula (Ruthe). 



Genus PACHYNEMATUS Konow, pp. 39-41 



Taxonomy and Distribution: Benson, 1962. Brit. Mus. (Nat. Hist.) 

 Bui. Ent. 12: 405-406 (Holarctic spp.).— Benson, 1963. Roy. Ent. 

 Soc. London Proc, B. 32: 162-164 {rumicis group). 



clibrichellus (Cameron). Host: Car ex. 



*clitellatus (Lepeletier). Labrador, Que.; Europe. Host: Grasses. 

 Nematus clitellatus Lepeletier, 1823. Monog. Tenthred., p. 62. 9. 



corticosus MacGillivray. Syn. of vagus (Fabricius). 



diaphanus (Eversman). Syn. of kirbyi (Dahlbom). 



*excisus (Thomson). Greenland; Arctic Europe. 



ISematus excisus Thomson, 1862. Svenska Vetensk. Akad. Ofvers. Forh. 

 19: 628. 9. 



extensicornis (Norton). Northern U. S., Canada; Holarctic. 



*Pachynematus foveolatus Konow^, 1903. Zeit. Hym. Dipt. 3: 379. (Syn. 

 by Benson, 1962, loc. cit. supra, p. 406). 



