1863.] 
93 
domen are pale fuscous. If we turn it aroimd, with the head towards 
us, this color disappears, and the whole surface seems to be pale ochra- 
ceous with a silky gloss. In examining this specimen, it occurred to 
me that it might be a very faded specimen of our common B. Pensyl- 
vanicus, for if we convert the pale fuscous into black, and the pale 
ochraceous into yellow, we will have the exact coloration, superiorly, 
of that species; but the hairs of the legs being pale ochraceous, and 
with the sericeous appearance of the insect, would be sufficient, in my 
estimation, to render it distinct, and it would scarcely be possible for 
the colors to change so greatly, particularly so, as the specimen, appa¬ 
rently, has never been in spirits. 
9. B. borealis. 
Bombus borealis, Kirby, Faun. Bor. Amer. 4. p. 272. 
“ Body clothed underneath with black, above with tawny hairs. 
Face and vertex with a tuft of yellowish ones } thorax, between the 
wings, with a black hairy band; wings somewhat embrowned, with 
black nervures; legs black; abdomen above with a thick coat of tawny 
hairs palest at the base; anus black. Length of body 8 lines. Taken 
with B. sylvicola.” 
In the collection of the Entomological Society there is a single female 
specimen from Canada (kindness of Mr. Saunders), which answers to 
the above description, except that the abdomen beneath is sparsely 
clothed with yellowish hairs, and the length of the body is 9 lines. I 
do not feel justified in separating them. 
10. B. fervidus. 
Apis fervida Fabr. Ent. Syst. Suppl. p. 274. 
Bombus fervidus Fabr. Syst. Piez. p. 352; St. Farg. Hym. 1, p. 470. 
Female. Head black. Thorax anteriorly and pleura yellow; a black 
band between the wings. Scutellum yellow. Wings fusco-hyaline, 
slightly tinged with violaceous. Legs black. Abdomen above yellow, 
excepting the two apical segments which are black. Beneath black. 
Length 10 lines. 
Variety. The yellow color deeper, the black band between the 
wings is broader, and the face and vertex is clothed with pale yellow 
hairs. 
Worker. Colored same as the female. Length 6—7 lines. 
Male. Head yellow in front and on the vertex. Thorax above tawuy- 
