HENRY J. FRANKLIN. 359 



Bonibns (Bombns) couperi Cress. 

 Bombus cotiperi Cresson, Proc. Ac. Nat. Sci. Phila., 1878, p. 185, 9 . 



Cresson, Trans. Amer. Ent. Soc, VII, 1879, p. 231 



(Catal.). 

 Cresson, Syn. Hym. No. Amer., 1887, p. 307. 

 Dalla Torre, Cat. Hym., X, 1896, p. 515. 

 Cockerell, Psyche, IX, 1901, p. 163. 

 Cockerell, Univ. Color. Studies, IV, 1907, p. 257. 

 Fletcher and Gibson, Can. Ent. Rec. (Ann. Rep't Ent. 



Soc. Ont.), 1908, p. 111. 



Types. — Described from two queens from Canada ; in the 

 collection of the American Entomological Society. 



Pile of medium length and rather fine. Face dark ; occiput variable ; 

 thorax yellow, with a broad black interalar band ; dorsutn of abdomen 

 with the two basal segments yellow, segment three black, segment four 

 black or black and yellow, segment five yellow or ferruginous-yellow , 

 segment six black or ferruginous-yellow ; corbicular fringes mostly 

 black. Malar space rather short. 



Queen. Head. — Face dark, but with a sprinkling of yellow hairs 

 (visible with a lens) about the bases of the antennae; occiput some- 

 times entirely dark and occasionally with a triangular patch of pure 

 yellow, but usually with a mixture of dark and yellow pile ; cheeks 

 dark. Labrum with large tubercle-like areas, their posterior (basal) 

 margins somewhat sharply rounded and their summits rather strongly 

 concaved and mostly impunctate ; the surface, between these areas 

 and above the shelf -like projection, rather deeply excavated ; the shelf- 

 like projection narrow and not prominent. Malar space not longer 

 than its width at apex, about one-fifth as long as the eye. Clypeus 

 sparsely and delicately punctate and shining over the disc, the corners 

 being coarsely punctate. Flagellum of antennae scarcely twice as long 

 as the scape ; third antennal segment distinctly longer than fifth ; the 

 fourth and fifth subequal in length. 



Thorax. — Anterior part of dorsum and scutellum with yellow pile 

 only ; a broad black band between the bases of the wings, but often 

 with a very strong admixture of yellow hairs on each side, close to the 

 base of the wing ; mesopleura covered with yellow pile to the bases of 

 the legs ; metapleura with yellow pile ; sides of the median segment 

 sometimes entirely dark, but usually with more or less yellow hair. 



Abdomen. — Dorsum : segments one and two yellow ; segment three 

 black ; segment four entirely black or with yellow pile on the apical 

 portion ; segment five covered with yellow or yellow-ferruginous pile ; 

 segment six usually entirely black, but often more or less ferruginous- 

 yellow. Venter mostly black, but with the sides of the apical margins 

 of segments three, four and five fringed somewhat with yellow hairs. 



TRANS. AM. ENT. SOC, XXXVIII. 



