114 PACKARD, HUMBLE BEES 



to that of the worker of B. fervidus. Length, .50 — .55 ; 

 breadth, .25 — .30 inch. 



I have carefully compared male specimens from Maine 

 and Massachusetts in Dr. Harris' cabinet labelled by him 

 " Bombus impatiens Say Ms." They do not differ from 

 undoubted males of B. virginicus, and I agree with Mr. 

 Cresson in considering it as a synonym of our common 

 species. 



I have taken the males very abundantly flying about 

 asters and solidagos during the middle of October, when 

 out of twenty males but a single worker of some other 

 species occurred. 



Female. Head broader than in B. vagans, front black 

 with a few yellow hairs between the antennae, and less 

 than the usual number on the vertex. Thorax and basal 

 joint of the abdomen yellow above and on the sides, 

 black beneath ; remainder of the body black. Wings 

 paler than usual. Legs with the tarsal joints longer than 

 in B. vagans; the first joint longer and slenderer, with 

 fuscous hairs on the edges, and the remaining joints 

 dilated more than in B. vagans ; dark fuscous, with lighter 

 fuscous hairs. Length, .30 ; breadth, .42 ; expanse of 

 wings, 1.60 inches. 



Worker. Length, .50 ; breadth, .20 inch. 



Bombus separatus Cresson. 



Male. Head a little broader than in B. virginicus, 

 to which this species is very closely allied ; the eyes 

 are large and full, and the front is narrower by one 

 third than in any other species ; vertex yellow, the 

 tuft larger than in B. virginicus ; a yellow tuft below not 

 reaching to the base of the labrum; both the maxillaa 

 and lingua are shorter than in B. virginicus ; lingua 

 with a single circle of spinules near the tip, which last 

 is longer than in that of B. fervidus ; the joints of the 

 antennas are shorter and more contracted in the middle 

 than usual. Thorax and abdomen colored as described in 

 worker. Legs black; tarsal joints slightly tinged with 

 testaceous ; femora beneath thickly clothed with long 

 yellow hairs ; first posterior tarsal joint longer and narrow- 

 er, remaining joints much stouter, though no longer than 



