APIDAE 519 



melanopygus var. washingtonensis (Frison). Syn. of melanopygus (Ny- 

 lander) . 



mixtus (Cresson). 



Bombus edtvardsii var. russulus (Frison) (syn. by Stephen, 1957, loc. cit. 

 supra, p. 113). 



perplexus Cresson. 



Apathus dorsalis Provancher. Syn. by Mitchell, 1962, loc. cit. supra, p. 

 533. (This species listed under Unplaced Species in Genus Psith- 

 yrus. Sup. 1, p. 261.) 



sandersoni Franklin, changed status. Ont. to Newfoundland, south to Tenn. 

 and N. C. On flowers of Epilohium, Malus, Pentstemon, Rhodo- 

 dendron and Rhus. 

 Bombus (Pratobombus) frigidus var. sandersoni Franklin. Raised to sp. 

 rank (teste Mitchell, 1962, loc. cit. supra, p. 534). 



sylvicola (Kirby). Calif., Nev., N. Mex. 



Bombus sylvicola var. gelidus Cresson (syn. by Stephen, 1957, loc. dt. 



supra, p. 126). 

 Bombus sylvicola var. sculleni (Frison) (syn. by Stephen, 1957, loc. cit. 



siqiTa, p. 126) . 



sylvicola var. gelidus (Cresson). Syn. of sylvicola (Kirby). 



sylvicola var. sculleni (Frison). Syn. of sylvicola (Kirby). 



ternarius Say. 



Bombus (Pratobombus) ternarius var. expallidus Cockerell. Syn. by 

 Mitchell, 1962, loc. cit. supra, p. 536. 



ternarius var. expallidus Cockerell. Syn. of ternarius Say. 



vagans vagans (Smith). 



Bombus (Pratobombus) vagans var. coctus (Bequaert and Plath). Syn. 



by Mitchell, 1962, loc. cit. supra, p. 537. 

 Bombus (Pratobombus) vagans var. helenae (Frison). Syn. by Mitchell, 



1962, loc. cit. supra, p. 537. 



vagans vsiT. coctus (Bequaert and Plath) . Syn. of vagans vagans (Smith). 



vagans var. helenae (Frison). Syn. of vagans vagans (Smith). 



vandykei (Frison). 



Bombus flavifrons var. vandykei (Frison). Raised to sp. rank (teste 

 Stephen, 1957, loc. cit. supra, p. 106). 



Unplaced Species in Genus Bombus, p. 1254 



Apis pennsylvanica Degeer. Transf. to Megabombus subg. Megabombus 



where it replaces americanorum (Fabricius). 

 Bombus bruneri Swenk, 1938. Delete this entry from Catalog (teste 



Milliron, 1962. Canad. Ent. 94: 728). The type locality (Texas) 



is erroneous, and the species is a synonym of the Eurasian 



muscorum L. 



Genus PSITHYRUS Lepeletier, pp. 1254-1255 



Milliron (1961. Kans. Ent. Soc. Jour. 34: 59-60) does not recognize sub- 

 genera of Psithyrus in his generic reclassification. Transf. Laboriopsithyrus 

 Frison to syn. of Emphoropsis Ashmead, p. 1239. 



Taxonomy: Medler, 1962. Canad. Ent. 94: 444-447, 1 fig., 3 tables (mor- 

 phometric study). 



ashtoni (Cresson). Hosts: Bombus affinis Sm. and B. terricola Kby. 



citrinus (Smith), changed status. Host: Pyrobombus impatiens (Cr.) and P. 

 vagans (Sm.). 

 Psithyrus (Laboriopsithyrus) laboriosus var. citrinus (Smith). Raised to 



sp. rank (teste Mitchell, 1962, loc. cit. supra, p. 540). 

 Psithyrus (Laboriopsithyrus) laboriosus (Fabricius) of Catalog, in part. 



