1863.] 
Ill 
Nothing is yet known of the economy of our species, and so far only 
a few have turned up. An examination of the nests of Bombus will 
doubtless bring more species to light. The following are all the species 
that have been identified. 
1. A. laboriosus. 
Bombus laboriosus Fabr. Syst. Piez. p. 352. 
Female. Head black, pale yellowish on the vertex. Thorax above 
and on the sides pale greyish-yellow. Wings subhyaline, stained with 
yellowish. Legs black. Abdomen shining black; sparsely hairy on 
the disk; sides of the third segment slightly mixed with yellowish. 
Beneath black. Length 10 lines. 
" Male. Not seen. 
Two specimens. Canada (Coll. Ent. Soc. Phila.) and Connecticut. 
(Coll. E. Norton.) 
There is no doubt that this is the same species as described by Fabri- 
cius under the above name, although he does not mention the mixture 
of yellowish hairs on the sides of the third abdominal segment, which 
is quite plain in the two specimens before me. 
2. A. intrudens. 
Ajpathus intrudens Smith, Journal of Entomology, i, p. 154. 
“ Female. Black : a tuft on the vertex and another in front of the 
anterior stemma pale yellow; the thorax clothed above with pale pubes¬ 
cence, which is continued down the sides in front of the tegulse; the 
thorax smooth and shining behind the scutellum; the legs with very 
short black pubescence^ the wings fusco-hyaline. Abdomen nearly 
naked, shining, incurved and very acute at the apex, the margins of 
the segments thinly fringed with black pubescence. 
“ Flah. Oajaca, Mexico. In the British Museum Collection.” 
Unknown to me. 
3. A. fraternus. 
Apathus fraternus Smith, Brit. Mus. Cat. Hym. ii, 385. 
'■‘■Male. Length 10 lines.—Black; the face below the insertion of 
the antennae densely covered with dark fuscous pubescence; the flagel¬ 
lum very slender, the joints subarcuate; on the vertex the pubescence 
is mixed with fulvous. Thorax clothed with short fulvo-ochraceous 
