OF WASHINGTON. 13 



segments. But the larvae of C. pergandei show some differ 

 ences in their last two stages, in having also some spines 

 belonging to type No. I, rounded at tip (fig. 3), not trumpet- 

 shaped, and more like those of the nymph of C. ciliata Say in 

 the first instar, according to Doctor Morrill. Besides there 

 appear in the last stage or pupal form some long, simple spines 

 of type No. 3, which are not pointed at the end, but slightly 

 inflated. Two very long spines of this latter shape rise from 

 the base of the head, and a few smaller ones from the abdomi 

 nal segments, dorsally, near the margins. The antennae are 

 sparsely covered with simple spines and the legs with very 

 short ones. I take pleasure in naming this new species in 

 honor of Mr. Theodore Pergande, who was the first to take 

 notice of this species. 



Mr. Barrett showed several photographs taken by Mr. 

 Fairchild and himself, of bumblebees in the act of mating, and 

 presented the following notes : 



NOTES ON THE COPULATION OF BOMBUS FERVIDUS. 

 By DAVID FAIRCHILD AND O. W. BARRETT. 



(Plate I.) 



While walking across the nursery plats of the Arlington 

 Farm, about October 13, the writers noticed three individuals 

 of a species of Bombus clinging to a young cherry tree about 

 six inches above the surface of the ground. Upon close ex 

 amination it was found that one male, apparently lifeless, was 

 in coitu with a female of the same color but slightly larger 

 size, and upon the back of the female another male was 

 actively endeavoring to copulate. The female clung tena 

 ciously to the stalk and paid little attention to the maneuvers 

 of the male upon her back. The male in coitu was suspended 

 by the genitalia only, all the legs being held appressed to the 

 body and motionless. Upon irritation with a straw the latter 

 male evinced life only by buzzing of the wings. The male 

 not in coitu, which may be designated as male No. 2, was 

 quick to notice any interference in his actions by means of 

 the straw but could not be induced to leave the body of the 

 female. 



Presumably copulation had continued for some little time 

 previous to the rinding of the specimens and there was no 

 apparent tendency towards its cessation when the coitus was 



