Review of the American BonibidcB. 169 



( 

 radial, receiving the first recurrent nervure, the third drawn up more 



than half towards the radial, receiving the second recurrent nervure near 

 the fourth cubital, this one not being commenced ; the cells of the limb 

 confounded with the fourth cubital. 



The three discoidal cells complete. Ocelli disposed in right line. 

 Body velvety. 



1st (and only) Genus Bombus, Fab. Latr. 

 Bremus, Jur. 

 Apis, Linn. 

 The cliaracters of the unrestricted genus are all contained in 

 those of the family as already given. 



SYNOPSIS OF SPECIES. 



"With St. Fargeau we divide the genus into three sections, 

 based on the colors of the hairs on the last segments of the 

 abdomen. 



* Last segment of the abdomen yellow or red. 



Two species of this section have, we believe, been identified, 

 and perhaps three ; the B. occidentalis, when described, we 

 placed in the next section, as, although the terminal segments 

 have a yellowish tinge, we have been in doubt whether this 

 may not have been caused by alcoholic immersion. 



I, noiiibii!!» Swckleyi, Greene. * (4) 



Head black, on vertex a few yellowish hairs. Corselet, ante- 

 rior part covered with yellowish hairs which extend around, 

 under, and are spread upon the sides of the thorax. A bare 

 roundish black space between wings, posterior part yellowish. 



Tergum yellowish but covered by scattered hairs, the fifth, 

 sixth segments, and anus more deeply covered than the other 

 segments ; the middles of these segments are slightly blackish. 



Length | of an inch $ . In my cabinet. 



Habitat. — Puget's Sound. Dr. Suckley ! 



