1863.] 
97 
This is a handsome species. It agrees with the description of 
B. pleuralis from Sitka, but besides its larger size, the difference of 
locality is so great that I have considered it safe to separate them. 
16. B. Groenlandicus. 
Bomhus Grcenlandicus Smith, Brit. Mus. Cat. Hym. ii, p. 393. 23. 
‘‘ Female. Length 9—10 lines. Black; the pubescence on the face 
black, that on the vertex is also black; the face elongate. Thorax, 
above, anteriorly and posteriorly having a long loose yellow pubescence, 
between the wings a broad band of black; wings subhyaline, stained 
with fuscous towards their base; the legs have a black pubescence. 
Abdomen, the two basal segments covered with long yellow pubescence, 
the apical ones with black. Hah. Grreenland.” 
Not identified. 
17. B. medius n. sp. 
Worker? Head black. Thorax anteriorly pale yellowish, with a 
broad black band between the wings. Scutellum pale yellowish. Wings 
blackish-violaceus. Legs black. Abdomen black, with the third seg¬ 
ment above pale yellowish. Beneath black. Length 7 lines. 
One specimen. Utah. Dr. Suckley. (Coll. Smith. Inst.) 
18. B. Californicus. 
Bomhus Californicus Smith, Brit. Mus. Catal. Hym. ii, 400. 57. 
Female. Black; the pubescence on the head black, that on the 
thorax before the wings fulvo-ochraceous, posteriorly and beneath black; 
the legs black; wings fuscous. Abdomen, the pubescence black, ex¬ 
cept that on the fourth segment, which is yellow. Length 10 lines. 
Worker. Same as female, except that the hairs on the head are 
yellow. Length 6 lines. 
Male. “ The pubescence as in the female, differing only in having 
that on the face yellow. Length 5—6 lines.” 
Hah. California. ( ^ , Coll. Ent. Soc. Philad.) Female and male 
not seen. In the worker the hairs are rather long, and those of the 
third segment of the abdomen above cover the anterior part of the yel¬ 
low of the fourth segment, giving the band of yellow on that segment 
the appearance of being very narrow. 
19. B. dubius n. sp. 
Worker? Head black. Thorax anteriorly pale yellowish; between 
