APIDAE 517 



balteatus (Dahlbom). Calif. 



Biology: Hobbs, 1964. Canad. Ent. 96: 1465-1470, 6 figs. 



americanoruni (Fabricius). Syn. of pennsylvanicus (Degeer). 



pennsylvanicus (Degeer). Transf. from Unplaced Species in Genus Bombus, 

 p. 1254. 

 Bombus (Fervidobombus) americanorum (Fabricius). Syn. by Mitchell, 

 1962, loc. cit. supra, p. 524. 



sonorus (Say), changed status. 



Bombus sonorus sonorus Say. Raised to sp. rank (teste Stephen, 1957, 



loc. cit. supra, p. 40) . 

 Bombus sonorus flavodorsalis Franklin (syn. by Stephen, 1957, loc. cit. 

 supra, p. 4()). 



sonorus flavodorsalis (Franklin). Syn. of sonorus (Say). 



Genus PYROBOMBUS Dalla Torre 

 PYROBOMBUS subgenus CULLUMANOBOMBUS Vogt 



Bombus subg. Fraternobombus Skorikov (syn. by Milliron, 1961, loc. cit. 



supra, p. 57). 

 Bombus subg. Senaratobombus Frison (syn. by Milliron, 1961, loc. cit. 



supra, p. 57). 

 Bombus subg. Crotchiibombus Franklin (syn. by Milliron, 1961, loc. cit. 



supra, p. 57 ) . 



crotchii crotchii (Cresson). 



Bombus crotchii var. nigricaudus (Frison) (syn. by Stephen, 1957, loc. 

 cit. supra, p. 57). 



crotchii var. nigricaudus (Frison). Syn. of crotchii crotchii Cresson. 



griseocolh's (Degeer). 



Bombus ( Separatobombus) griseocollis var. mormonorum Franklin 



(syn. by Stephen, 1957, loc. cit. supra, p. 50). 

 Bombus (Separatobombus) griseocollis var. nero (Bequaert and Plath). 

 Syn. by Mitchell, 1962, loc. cit. supra, p. 527. 



griseocollis var. mormonorum (Franklin). Syn. of griseocollis (Degeer). 



griseocollis var. nero (Bequaert and Plath). Syn. of griseocollis (Degeer). 



morrisoni var. umbrosus Friese. Change Canada to Colo. 



rufocinctus (Cresson). 



Bombus rufocinctus var. albertensis Cockerell (syn. by Stephen, 1957, 

 loc. cit. supra, p. 62). 



Bombus rufocinctus var. iridis Cockerell and Porter (syn. by Stephen, 

 1957, loc. cit. supra, p. 62). 



Bombus rufocinctus var. prunellae Cockerell and Porter (syn. by Ste- 

 phen, 1957, loc. cit. supra, p. 62). 



rufocinctus var. albertensis (Cockerell). Syn. of rufocinctus (Cresson). 



rufocinctus var. iridis (Cockerell and Porter). Syn. of rufocinctus (Cresson). 



rufocinctus var. prunellae (Cockerell and Porter). Syn. of rufocinctus (Cres- 

 son). 



PYROBOMBUS subgenus PYROBOMBUS Dalla Torre 

 ( = Bofnfaus subg. Pro/obomfaos Vogt, pp. 1250-1253) 



bifariiis bifarius (Cresson), changed status. 



Bombus bifarius Cresson. Reduced to subsp. rank (teste Stephen, 1957, 



Inc. ciL supra, p. 142). 

 Bombus bifarius var. kenoyeri Cockerell (syn. by Stephen, 1957, loc. cit. 



supra, p. 142). 

 Bombus bifarius var. vancouvcrensis Cresson (syn. by Stephen, 1957, 



lor. rit. Rupra, p. 142). 

 Bombus edtcardsii var. fuscifrons Swenk (syn. by Stephen, loc. cit. supra, 



p. 142). 



