1U(3 [July 
one specimen the base of the third segment of the abdomen above is 
mixed with black. Length 7 lines. 
Eleven (3 $ , 1 ^ , 7 'S ) specimens examined. Ft. Youcon, Arctic 
America; Hudson’s Bay Territory, and Kansas. (Coll. Ent. Soc. Phil. 
E. Norton, and Smith. Inst.) 
The black color on the apical segments of the abdomen of the worker, 
being mixed with red, would seem to connect it with B. praticola of 
Kirby, which I have not identified, but, for the present, it would 
probably be better to keep them separated. 
36. B. praticola. 
Bomhus praticola Kirby, Faun. Bor. Am. 4, p. 274. 
“ Female. Body black, clothed above with yellowish hairs. Head 
with a tuft of yellowish hairs below the antennge, and on the vertex; 
thorax black between the wings, which are embrowned; legs with yellow 
hairs at the base; anterior half of the abdomen yellow, posterior ferru¬ 
ginous. Length of the body 7 lines.” 
British America. Unknown to me. 
37. B. sylvicola. 
Bomhus sylvicola Kirby, Faun. Bor. Amer. 4, p. 272. 
Female. Head black; the vertex and a tuft of hairs below the in¬ 
sertion of the antennae, yellowish. Thorax yellowish, with a broad 
black band between the wings. Wings subhyaline, varied with fuscous. 
Legs black; femora beneath with yellowish hairs. Abdomen above 
yellowish, with the second and third segments reddish. Beneath black, 
mixed with pale hairs. Length 8—9 lines. 
Worker and male not seen. 
Four specimens. Youcon River, Arctic America, and G-reat Slave 
Lake. Mr. R. Kennicott. (Coll. Smith. Inst.) 
I take the specimens before me to be the same species as described 
by Mr. Kirby, under the above name, although he does not mention 
the position of the reddish bands on the abdomen. His description 
was taken from a single specimen (sex not mentioned) captured in 
Lat. 65°. 
38. B. rufo-cinctus n. sp. 
Male. Head black, hairs on the vertex and a tuft in front below 
the antennae yellow. Thorax yellow, with an indistinct band between 
