518 HYMENOPTERA OF AMERICA NORTH OF MEXICO 



bifarius nearcticus (Handlirsch) , changed status. 



Bomhus bifarius var. nearcticus Handlirsch. Raised to subsp. rank {teste 

 Stephen, 1957, loc. cit. supra, p. 145). 



bifarius yar. kenoyeri (Cockerell). Syn. of bifarius bifarius (Cresson). 



bifarius var. nearcticus (Handlirsch). Raised to subsp. rank. 



bifarius var. vancouverensis (Cresson). Syn. of bifarius bifarius (Cresson). 



caliginosus (Prison). 



Bombus caliginosus var. tardus (Frison) (syn. by Stephen, 1957, loc. cit. 

 supra, p. 100). 



caliginosus var. tardus (Frison). Syn. of caliginosus (Frison). 



centralis (Cresson). 



Bombus centralis var. fucatus (Frison) (syn. by Stephen, 1957, loc. cit. 



supra, p. 95). 

 Bombus centralis var. monardae Cockerell and Porter (syn. by Stephen, 



1957, loc. cit. supra, p. 95). 

 Bombus centralis var. stolidus (Frison) (syn. by Stephen, 1957, loc. cit. 



supra, p. 95). 



centralis var. fucatus (Frison). Syn. of centralis (Cresson). 



centralis yar. monardae (Cockerell and Porter) . Syn. of centralis (Cresson). 



centralis var. stolidus (Frison). Syn. of centralis (Cresson). 



edwardsii var. fuscifrons (Swenk). Syn. of bifarius bifarius (Cresson). 



edwardsii var. russulus (Frison). Syn. of mixtus (Cresson). 



flavifrons dimidiatus (Ashmead), changed status. Calif, to south. B. C. 



Bombus flavifrons var. dimidiatus Ashmead. Raised to subsp. rank 



(teste Stephen, 1957, loc. cit. supra, p. 92). 

 Bombus flavifrons var. ambiguus Franklin (syn. by Stephen, 1957, loc. 

 cit. supra, p. 92). 



flavifrons flavifrons (Cresson), changed status. 



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



loc. cit. supra, p. 88). 

 Taxonomy: Milliron, 1962. Brooklyn Ent. Soc. Bui. 57: 45-46 (gynan- 



dromorph). 



flavifrons var. ambiguus (Franklin). Syn. of flavifrons dimidiatus (Ash- 

 mead). 



flavifrons var. dimidiatus (Ashmead). Raised to subsp. rank. 



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



frigidus (Smith). 



Bombus frigidus var. couperi Cresson (syn. by Stephen, 1957, loc. cit. 

 supra, p. 124). 



frigidus var. couperi (Cresson). Syn. of frigidus (Smith). 



frigidus var. sandersoni Franklin. Raised to sp. rank. 



huntii (Greene). 



Bombus huntii var. rufosuffusus Cockerell (syn. by Stephen, 1957, loc. 



cit. supra, p. 135) . 

 Biology: Medler, 1959. Ent. News 70: 179-182. 



huntii var. rufosuffusus (Cockerell). Syn of huntii (Greene). 



impatiens Cresson. 



Bombus impatiens var. deayi Chandler. Syn. by Mitchell, 1962, loc. cit. 

 supra, p. 532. 



impatiens var. deayi Chandler. Syn. of impatiens Cresson. 

 melanopygus (Ny lander). 



Bombus melanopygus var. tvashingtonensis (Frison) (syn. by Stephen, 

 1957, loc. cit. supra, p. 132). 



