HENRY J. FRANKLIN. 311 



ginicus) " add Bombus impatiens Harris, Cat. Ins. Mass. 

 Second edition, Cresson, Proc. Ent. Soc. Phila., II, p. 90, 

 cf." The collection of the American Entomological Society 

 contains a series of specimens determined as B. virginicus 

 by Cresson. 



Pile rather short and coarse. The dorsmn of the thorax and the 

 pleura to the bases of the legs covered with yellow pile. Dorsum of ab- 

 domen with the first se^tnent yellow and the rest black. Malar space of 

 fetnales rather short and their cor bicular fringes black 



Queen. Head. — Broad and somewhat rounded. Face entirely black 

 or with a sprinkling of yellow hairs about the bases of the antennee ; 

 occiput with a triangular patch of yellow pile, but very often with a 

 more or less strong admixture of black hairs ; cheeks black. Labrum 

 with tubercle-like areas well separated, their margins rather sharply 

 elevated and summits deeply concaved ; the region between these 

 areas and above the shelf-like projection deeply excavated ; shelf-like 

 projection wide and prominent ; translucent areas faintly visible to the 

 naked eye. Malar space somewhat shorter than its width at the apex ; 

 about one-sixth as long as the eye. Clypeus rather finely and unevenly 

 punctate over the disc. Flagellum of antenna about twice as long as 

 the scape ; the third antennal segment longer than the fifth, the fifth 

 longer than the fourth. 



Thorax. — A narrow linear space on the disc bare and smooth, the 

 dorsum otherwise, and the mesopleuratothe bases, of the legs, covered 

 with yellow pile, there being an admixture of black hairs on the dor- 

 sum between the bases of the wings, giving this region a somewhat 

 shaded appearance ; metapleura with yellow pile, except on their lower 

 parts ; sides of median segment bearing yellow pile, but very often 

 with black hair more or less strongly admixed. 



Abdomen. — Dorsum with segment one covered with yellow pile, the 

 remaining segments entirely black. 



Wings. — Somewhat stained with brown ; the hind pair subhyaline ; 

 the fore pair mostly subhyaline except in the region beyond the veins, 

 this portion being distinctly brown. 



Legs. — Black, often with touches of yellow pile on the trochanters 

 or on the bases of the femora. 



Worker — Much like the queen ; head sometimes entirely black. 



Male. Head. — Broad and rounded. Face with clypeus mostly bear- 

 ing pure yellow pile, sometimes with black hairs admixed and with 

 black and yellow hair mixed about the bases of the antennae ; occiput 

 usually with a triangular patch of pure yellow pile, but sometimes 

 with black hairs admixed ; ventro-lateral portions of head with con- 

 siderable yellow pile, this usually not connecting with the yellow on 

 the occiput. Malar space about as long as its width at apex, about 

 one-fifth as long as the eye. Clypeus mostly covered up with pile. 



TRANS. AM. ENT. SOC, XXXVIII. 



