520 HYMENOPTERA OF AMERICA NORTH OF MEXICO 



Apathus contiguus transf. to syn. of citrinus (teste Mitchell, 1962, 

 loc. cit. supra, p. 540). 



fernaldae Franklin. Host: "i Pijrobombus perplexus (Cr.). 



Morphology: Milliron, 1961. Brooklyn Ent. Soc. Bull. 55: 109-113, 2 figs. 

 ( gynandromorph ) . 



insularis (Smith). Host: Pyrobombus flavifrons (Cr.). 



laboriosus (Fabricius). B. laboriosus transf. to Emphoropsis, p. 1239, but 

 contiguus Cresson is transf. to syn. of Psithyrus citrinus (Smith). 



laboriosus var. citrinus (Smith). Raised to sp. rank. 



variabilis (Cresson). Host: Megabombus pennsylvanicus (Deg.). 



Biology: Webb, 1961. North Central Branch, Ent. Soc. Amer. Proc. 16: 

 16. 



Unplaced Species in Genus Psithyrus, p. 1255 



Apathus dorsalis Provancher. Listed first in Sup. 1, p. 261; transf. to 

 Pyrobombus subg. Pyrobombus as a syn. of perplexus Cresson. 



Genus APIS Linnaeus, p. 1255 



Morphology: Daly, 1964. Univ. Calif. Pubs. Ent. 39: 1-77, 54 figs, (ske- 

 leto-muscular morphogenesis of thorax and wings). 



In Rafinesque entry, change Apairus to Apiarus, and Palmero to Pal- 

 ermo. 



