\'oI. XXvi] ENTOMOLOGICAL NEWS 



409 



Notes on Bombidae, with Descriptions of New Forms 



(Hym.). 



By Henry J. Frankun, Massachusetts Agricultural College, 



Andierst, 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 (Bombos) slbonifcr new tpedes. 



Types: The queen and male described below came from 

 Ccrro 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 7xxx> ft. alt. — H. Rogers, col- 

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

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

 Museum. 



PUt of wt*4imm length amd rather itme. Head mostly dark. Sides 

 of thorax white; Us dorsum, except the scMteUum. mostly black. Ab- 

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

 white, otherwise entirely black. 



Queen. Head.—Fikct entirely dark; oodpat black, but with a faint 

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

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

 fifth as kmf as the eye Qypois rather sparsely punctate over the 

 disc with rather coarse p un ct ur e s . 



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 scutcllum clothed heavily with white pile. Ilesopleura from 

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

 of owdiHi scfmcnt clothed with white pile. 



^6^M^ii.— Dorsum : Segment one clothed with pure white pile; 

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

 nmning 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 scgnent and growing rapidly narrower until it 

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

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

 dark. 



If'iiiy/.— Only moderately infuscate; about like those of the ephip- 

 piaius queen; the fore pair lightest acroM their middle portions. 



