14 
[ J ULY 
yellow, mixed with black on the pleura; a broad black band between 
the wings. Wings subhyaline. Legs black, slightly mixed with yel¬ 
lowish on the femora beneath. Abdomen with the first four and the 
posterior margin of the fifth segments above tawny-yellow, the remain¬ 
ing segments black. Beneath yellowish. Length 7 lines. 
Twenty-seven (14 9 , 10 ^ , 3 S ) specimens examined. Can., Conn., 
N. Y., Penn., Del., Va., Ks., and Utah. (Coll. Ent. Soc. Phil., and 
E. Norton ) 
I have seen no specimens so large as mentioned by St. Fargeau,-13 
lines. 
11. B. Pensylvanicus. 
Apis Pensylvanica De Geer, Mem. iii. p. 575, pi. 28, f. 12. (1773). 
Apis Americanorum Fabr. Syst. Ent. p. 380. (1775); Ent. Svst. ii, p. 319. (1793); 
Oliv. Eneycl. Meth. iv, p. 66. (1789). 
Bomhus Americanorum Fabr. Syst. Piez. p. 316. (1801); St. Farg. Hym. i, j). 
172. (1836j. 
Female. Head black, often more or less yellow on the vertex. Tho¬ 
rax with its anterior portion above yellow; between the wings black. 
Scutellum black, generally mixed with yellow. Wings blackish-viola¬ 
ceous. Legs black; tarsi brown, basal joint rufous on the inner side. 
Abdomen with the first segment above generally more or less yellow, 
sometimes almost all black; second and third segments yellow, remain¬ 
ing segments black. Length 9—12 lines. 
Worker. Differs in no respect from the female, except in size; in 
color it undergoes the same variations. Length 6—8 lines. 
Male. Head black, intermixed with obscure yellowish on the face 
and vertex; eyes very large and prominent, almost contiguous on the 
vertex. Thorax above and on the sides tawny-yellow, with a blackish 
band between the wings; in some specimens the thorax is entirely yel¬ 
lowish. Wings fusco-hyaline, darkest along the costa and towards the 
base. Legs black; hairs of the basal joint of the posterior tarsi pale; 
tarsi brown. Abdomen with the first three segments tawny-yellow, 
slightly mixed with blackish on the base of the first segment; remain¬ 
ing segments black. Beneath black, sparsely clothed with pale hairs. 
Length 10 lines. 
Eighty specimens examined from Conn., N. Y., N. J., Penn., Del., 
Md., Ya., Ill., Mo., Ks., Fla., Tex. (Coll. Ent. Soc. Phila., E. Norton.) 
Tills is our most common species, and has generally been known 
