356 Trans. Acad. Sci. of St. Louis. 



$. Also closely resembles male of M. confusa, but smaller, 



flagellum testaceous beneath; clypeus except a notch on each 

 side of base yellowish, sometimes with only a band before 

 apex, apex yellowish or with a black edge ; labrum black or 

 with more or less yellow, mandibles rarely with a yellow spot 

 at base and usually with a yellow streak before apex; 

 mesonotum and scutellum more or less mixed with blackish 

 hairs, or sometimes with dark hairs entirely wanting; abdomen 

 black, the apical margins of segments sometimes slightly dull 

 rufous ; fasciae ochraceous, narrow, subdiscal, fuscous on 

 sixth segment. Length 9 mm. 



Carlinville, Illinois ; 16 $, 29 $ specimens. 



I have females of this species which were identified as M. 

 confusa by Mr. Cresson for me and for Professor Trelease. 

 It may turn out to be only a form of that species. 



Bombus Latr. 



Specimens of the sexes of B. borealis and B. fervidus, 

 each set from its own nest, were received from Professor Corn- 

 stock. These, as well as the observations of Coville, in 

 Proc. Ent. Soc. Washington I, 201, 1890, convince me that 

 the species are quite distinct. The Apis elata F. is the male 

 of B. fervidus. Apathus elatus Cress, includes males of B. 

 fervidus and B. americanorum, those of the latter always 

 with a black band between the wings. I have taken the 

 males of B. americanorum and B. nidulans from the same 

 nest, and Cresson records a similar case in Proc. Ent. Soc. 

 Phil. II, 165, the names used there being synonyms of B. 

 americanorum. 



Carlinville, Illinois, March 25, 1897. 



Issued May 7, 1897. 



