154 
I have taken this insect several times on the mountains 
of Hawaii. It is somewhat variable ; I have several 
specimens that I attribute to it, in which the punctu- 
ation is even more faintly impressed than in the 
type, and one in which the metathorax is slightly 
rugose. I have also a male (possibly a distinct 
species) which seems a little more strongly punctured, 
and has the basal segment of the hind body margined 
with testaceous behind. I have also a female differ- 
ing from the type in having the apex of the clypeus 
(as well as the mandibles) red. One specimen departs 
from the type in having the clypeus somewhat more 
deeply imarginate, in one or two the tuberculate 
form of the second segment of the hind body is only 
feebly developed, in another the wings are almost 
devoid of colouriug, and in another, one mandible is 
black. 
23. — Odynerus haleakal^. 
0 haleakalce, sp. nov. Subnitidus ; suhtiliter puhescens ; 
niger; mandihulis plus minusve rufis, cdis violaceis; clypeo 
minus emarginato ; capite thoraceque crehre fortiter punc- 
tatis ; abdominis segmento primo transverso, antice parum 
verticali, crassius nec fortiter punctato ; segmento*secundo 
tuberculato-elevato. 
Long. 6 12 mm. $ 15 mm. 
Both head and thorax have a double system of punctua- 
tion. On the head the larger punctures are so close 
and deep that the finer ones need looking for; on 
the thorax (including the scutellum) the larger ones 
are more sparing, while the smaller ones are more 
noticeable on the prothorax, but become less so back- 
wards, being scarcely discoverable on the metathorax. 
The first segment of the hind body is rather strongly 
transverse, much rounded off (i.e., not vertical) in 
front, and is only sparingly, though rather strongly. 
