1863.] 
105 
a broad black band between the wings. Wings subhyaline, apical mar¬ 
gin stained with brown. Legs black; base of femora beneath clothed 
with yellow hairs; tarsi brown. Abdomen with the first and fourth 
segments above lemon-yellow; second and third segments bright ful¬ 
vous; the two apical segments black. Beneath black, intermixed with 
yellowish. Length 10 lines. 
Worker. Same as the female, except size, and the colors are not so 
bright. Length 5—6 lines. 
Male. Colored same as the female. Length 7 lines. 
Sixteen (5 9,10 ^ , IS) specimens examined. Me., Conn., Penn., 
Kansas, Utah, Puget’s Sound, and Arctic America. (Coll. Ent. Soc. 
Phil, and E. Norton). 
This is a beautiful species when fresh; in alcoholic specimens the 
yellow is faded to a dirty white, and the fulvous color becomes more 
of a reddish hue. I see no reason why B. Huntii Gireene, should be 
separated from this species, the colors are situated exactly the same, 
although faded by alcoholic immersion; and if the abdominal segments 
were not unnaturally distended, the entire length of the insect would 
not exceed 10 lines. 
-.35. B. flavifrons n. sp. 
Female. Head yellow in front and on the vertex. Thorax yellow¬ 
ish, mixed with blackish above, with a blackish band between the 
wings. Wings subhyaline, slightly stained with fuscous. Legs black, 
with pale hairs; femora beneath densely clothed with yellowish hairs; 
inner side of the basal joint of tarsi golden yellow in certain lights. 
Abdomen with the two basal segments above yellowish; the third and 
fourth fulvous; the remaining segments blackish. Beneath black, 
clothed with yellowish hairs. Length 8 lines. 
Worker. Colored same as the female, except that the band between 
the wings is much more distinct, the color of the third and fourth seg¬ 
ments of the abdomen above is more reddish, and the black color of the 
apical segments somewhat mixed with reddish. Length 5J lines. 
Male. Besembles the female, but the hairs are somewhat longer, 
and those on the face more dense; the color of the third and fourth 
segments of the abdomen above same as that of the worker; the legs 
and the abdomen beneath are thickly clothed with yellowish hairs. In 
