1892.] NATURAL SCIENCES OF PHILADELPHIA. 135 



the first three and last two abdominal segments, dorsally, with 

 yellow pubescence ; the inner side of first joint of posterior tarsi 

 with brownish, glittering pubescence ; otherwise black. 



Bombus hyperboreus Dhlb. {=arcticus Kirby.) 



This species appears to have been the most abundant. In all 

 four 5 and six $ specimens were obtained. Disco Island, June 

 27th., three 9 's, August lOth., six ^ 's. One specimen a female, 

 has the yellowish pubescence much paler than in the other speci- 

 mens of this sex. 



Bombus sp. ? 



Two $ specimens. Disco Island, August 10th. I have been 

 unable to identify these specimens with any of the known species of 

 Europe and America. The great variation to which representatives 

 of this genus are subject and the lack of European material at 

 hand, renders it unsafe to describe these as new. 



