Vol. XXvi] ENTOMOLOGICAL NEWS 409 



Notes on Bombidae, with Descriptions of New Forms 



(Hym.). 



By HENRY J. FRANKLIN, Massachusetts Agricultural College, 



Amherst, Mass. 



In this paper, I present descriptions of the new American 

 forms of Bombus and Psithyrus, of which I have seen repre- 

 sentatives and also the new records of distribution which I 

 have accumulated since the appearance of my monograph of 

 the Bombidae of the New World. (Trans. Amer. Ent. Soc. 



xxxix, 1913). 



Bombus (Bombus) alboniger new species. 



Types: The queen and male described below came from 

 Cerro Zunil, Guatemala (4,000 to 5,000 ft. alt.), having been 

 collected by G. C. Champion. The worker type came from 

 Irazu, Costa Rica (6,000 to 7,000 ft. alt. H. Rogers, col- 

 lector). All these specimens, together with a queen paratype 

 from Cerro Zunil, are deposited in the collection of the British 

 Museum. 



Pile of medium length and rather fine. Head mostly dark. Sides 

 of thorax white; its dorsum, except the scutcllum, mostly black. Ab- 

 domen with the first dorsal segment and the middle of the second 

 white, otherwise entirely black. 



Queen. Head. Face entirely dark ; occiput black, but with a faint 

 admixture of very fine pale yellow hairs; cheeks entirely dark. 

 Malar space somewhat shorter than its width at apex, about one- 

 fifth as long as the eye. Clypeus rather sparsely punctate over the 

 disc with rather coarse punctures. 



Thorax. Dorsum mostly black, but with a very noticeable triangular 

 spot of yellow pile just back of the head and with the hind margin 

 of the scutellum clothed heavily with white pile. Mesopleura from 

 the bases of the wings to the bases of the legs, metapleura and sides 

 of median segment clothed with white pile. 



Abdomen. Dorsum: Segment one clothed with pure white pile; 

 segment two black on the sides, but with a wide patch of white pile 

 running across its middle part (this patch being widest more than 

 two-thirds of the entire width of the abdomen at that place at the 

 front margin of the segment and growing rapidly narrower until it 

 reaches the hind margin where it is about one-third as wide as the 

 segment) ; segments three to six inclusive entirely black. Venter 

 dark. 



Wings. Only moderately infuscate; about like those of the ephip- 

 piatus queen ; the fore pair lightest across their middle portions. 



