151 
18. — Odynerus extraneus. 
Odynerus extraneus, Kirby, Ent. Mo. Mag. XVII., p. 86. 
Kauai. 
19. — Odynerus nigripennis. 
Rhygchium nigripenne, Hojmgren, Eugenies Kesa, Zool. 
VI., p. 441. 
Odynerus maurus, Smith, Proc. Lin. Soc. XIV., p. 679. 
Common at Honolulu. 
20.— Odynerus dromedarius, sp. nov. 
9 Rohustus ; subnitidus ; suhtiliter puhescens ; puncta- 
tus ; niger, fronte ruhromaculato, alis Icete cceruleis ; clypeo 
leviter emarginato; abdominis segmento primo fortiter 
transverse antice verticali, segmento secundo fortiter tuber- 
culato-elevato ; metathorace haud rugoso. 
Long. 15 mm. 
The head is rather closely and coarsely, but not deeply 
punctured ; the pro thorax, mesothorax, and scutellum 
have two systems of punctuation,— -one very fine and 
close, the other larger and sparing, — the larger 
punctures being almost non-existent on the scutellum 
and post scutellum. The metathorax is finely aluta- 
ceous and bears a few rather large, but not deep, 
punctures. The hind body is finely and sparingly 
punctured to near the apex of the 2nd segment, where 
the punctuation becomes (and it continues over the 
next three segments) coarse and rather close. The 
wings are of a very beautiful bright blue colour. The 
elevation of the 2nd segment of the hind body gives 
the insect a most remarkable appearance, the summit 
of the “hump” into which the segment is gathered 
up appearing (when viewed from the side) to be 
abruptly raised above the first segment by about a 
third the total height of the segment. The pubescence 
(of a whitish colour) is very fine and is dense enough 
to prevent the surface from being very shining. 
