1863.] 
91 
article ferruginous. Thorax hairy, ferruginous. Abdomen hairy, 
black, second segment yellow. Posterior legs very hairy. Wings 
blackish-violaceous. Hah. America.” 
Unknown to me. Is it a Bomhus? 
4. B. vagans. 
Bombus vagans Smith, Brit. Mus. Cat. Hym. ii, p. 399. 
Female. Head black, often more or less yellow on the vertex. Tho¬ 
rax above and on the sides yellow, sometimes slightly intermixed with 
black between the wings. Wings fusco-hyaline. Legs black ; in some 
specimens the base of the femora below have a few yellowish hairs; 
tarsi brown. Abdomen with the first two segments above yellowish, 
remaining segments black, except in two specimens which have the 
apical segment slightly mixed with yellow. Beneath black. Length 
8—12 lines. 
Worker. Colored as the female. Length 6—7 lines. 
Male. Head yellowish, slightly mixed with black, with a thick tuft 
of bright yellow in front below the antennae. Thorax above and on 
the sides pale yellow. Wings subhyaline, faintly clouded on the apical 
margins. Legs black; femora clothed beneath with yellowish hairs. 
Abdomen with the first two segments above pale yellow; remaining 
segments black, except the apical one, which is sometimes mixed with 
yellowish. Beneath clothed with yellowish hairs. Length 6—8 lines. 
' Forty-two (14 9 , 19 $ , 9 S ) specimens examined, from various lo¬ 
calities:—Can., Me., Conn., Pa., N. J., Del., D. C., Va., Ill. (Coll. 
Ent. Soc. Phil, and E. Norton.) 
5. B. perplexus n. sp. 
Male. Head black, with a tuft of pale hairs in front below the an¬ 
tennae ; vertex yellowish. Thorax bright honey-yellow. . Wings hya¬ 
line, apical margins faintly clouded. Legs black; base of femora be¬ 
neath yellowish. Abdomen with the three basal segments bright honey- 
yellow, the third segment having a slight admixture of black; remain¬ 
ing segments black. Beneath black, slightly mixed with yellowish. 
Length 8 lines. 
Female and worker not seen. 
One specimen. Connecticut. (Coll. Mr. E. Norton.) 
This species closely resembles B. Hudwnicus^ but the form of the 
