H. J. FRANKLIN. 163 



Abdomen. — Dorsum : segments one and two whitish ; the remaining 

 segments mostly dark, but with considerable whitish pile on the sides. 

 Venter with mostly whitish pile. 



Wings. — Much lighter than those of the females ; somewhat stained 

 with brown. 



Legs. — Coxae, trochanters and femora all clothed for the most part 

 with whitish pile ; fore tibiae mostly dark ; middle tibiae mostly dark 

 or with considerable whitish pile on their hind sides ; hind tibiae with 

 outer faces mostly bare, their front fringes short and mostly dark, 

 their hind fringes long and dark or whitish ; hind metatarsi with long 

 and more or less whitish hind fringes. 



Dimensions. — Length: queen, 17 mm. to 21| mm. ; worker, 11 mm. 

 to 17 mm. ; male, about 13 mm. Spread of wings: queen, 41 mm. 

 to 43 mm. ; worker, 26 mm. to 37 mm. ; male, about 34 mm. Width 

 of abdomen at second segment: queen, about 9} mm.; worker, S\ 

 mm. to 8 mm.; male, about 7| mm. 



This species is closely allied to B. separahis and it is quite 

 possible that it should be considered a subspecies or color 

 variant of that species. 



Boiubus (Bombias) mexicensis new species. 



Bombus teriiarins (var. d.). Ant. Handlirsch, Ann. naturh. Hofmus. 

 Wien. Ill, 1888, p. 230, 9 (misidentification) . 



Type. — Described from four cotype queens from Mexico, 

 of which one is deposited in the collection of the Massachu- 

 setts Agricultural College, and three in the collection of the 

 United States National Museum. 



Pile rather short and rather coarse. Malar space short. Head mostly 

 dark. Dorsum of thorax yellow, with a broad black interalar band. 

 Mesopleurce mostly yellow. Dorsum of abdoinen yelloiv, red and black. 

 Wings rather light. Legs black. 



Queen. — Head. — Short for its width. Face mostly black, but with a 

 faint sprinkling of short pale pile intermixed with the black hair on 

 the region around the bases of the antennae. Occiput with mostly 

 black pile, but with an admixture of pale yellow hairs, especially on 

 the very hind margin. Side of heads behind eyes entirely dark. 

 Malar space considerably shorter than its width at apex ; slightly less 

 than one-sixth as long as the eye. Clypeus shining and rather sparsely 

 and delicately punctate. Ocelli not far below the supraorbital line ; 

 slightly above the narrowest part of the front ; the lateral ones some- 

 what nearer to the margins of the eyes than to each other. Flagellun 

 of antennae about one and two-thirds times as long as the scape ; the 

 third antennal segment equal to the fourth and fifth taken together, 

 the fifth scarcely longer than the fourth. 



TRANS. AM. ENT. SOC. , XXXVII. 



