98 THE CANADIAN ENTOMOLOGIST. 



1. Pale pubescence of abdomen ochreoiis 2. 



Pale pubescence of abdomen at least partly reddish 3. 



2. Dorsum of thorax entirely pale Morrisonii, 



Dorsum of thorax black, in the centre Nevadensis. 



Dorsum of thorax with a black band. 



Face with black pubescence, 5 with two apical segments 



black Pemisylvanicus ( =^fervidus.) 



. Face with pale pubescence, $ with the apical segment 



black appositus. 



3. Dorsulum not banded, pale and black hairs mixed inelavopygus. 



Dorsulum banded ; second and third segments of abdomen distinctly 



reddish. 



Scutellum entirely pale teniarius. 



Scutellum partly black btfarius. 



Third and fourth abdominal .segments indistinctly 



reddish Vancouver ensis. 



4. Apex of abdomen pale 5. 



Apex of abdomen largely black 6. 



5. First abdominal segment black occidentalis. 



First abdominal segment pale, or with some black. 



Last three segments pale yellowish viixtuosus. 



Last three segments pale white and yellow, or white and 



tawny Oregonensis. 



First abdominal segment with some black. 



Last three segments pale and black and brownish at 



apex Putnamii. 



First abdominal segment without black Sitkensis. 



■6. First segment black Californicus. 



First segment pale Edwardsii. 



First segment black only at base Americanorutn. 



Boinbus Morrisonii, Cress., Proc. Acad. Nat, Sci., Phil., 1S7S, p. 183. 



One ? (without data) received from Prof. Cordley. 

 Bombus Nevadensis, Cress., Trans., Am. Ent. Soc, Phil., v., p. 102. 



Females, Condon, Oregon, 8th and 23rd July. (Cordley.) 

 Bo7)ibus Pennsylv aniens, De Geer, =fervidus, Fabr. 



B. (Apis) Pejinsylvanicus, De Geer, Mem. Hist. Insect, iii., 1773. 



P- 575- 



B. (Apis) fervida, Fabr., Supp. Entom. System., 1798, p. 274. 



