162 
Black, with the following parts red, viz. : a spot behind 
the base of the antennae, the greater portion of the 
pro thorax, some spots on the tegulae and a spot below 
them, some spots on the scutellum and post scutellum, 
the hind margin of the basal segment of the hind 
body, the hind margin of the second segment and an 
oblique spot on each side of the same, and the hind 
margin of the third segment. The head is closely 
and coarsely punctured ; the thorax has a double 
system of punctuation, — the smaller punctures not 
very close, the larger very coarse ; the metathorax is 
coarsely punctured but scarcely rugose ; the hind 
body is sparingly punctured, the punctures obscure 
and lightly impressed but becoming stronger in the 
apical half, the basal segment very strongly trans- 
verse, and not at all vertical in front. The fuscous 
pubescence on the hind body is fine and quite dense, 
giving the insect a silky appearance. 
I have one male and three females of this distinct species ; 
all were captured on the mountains of Oahu. The 
difference between the clypeus of the male and of the 
female is so exceptionally strong that I suspect the 
male of being a variety — though I notice a slight 
(indeed scarcely discernible) difference of the same 
kind in most species of the genus in my collection. 
34. — Odynerus agilis. 
Odynerus agilis, Smith, l.c. p. 681. 
To this species I attribute numerous individuals captured 
by me in various localities on Maui, Lanai, and 
Hawaii. If I am right in doing so this is one of the 
most variable species of the genus, and the original 
description needs the addition of the following note : 
The degree of intensity with which the punctuation on 
the thorax is impressed differs in almost every two 
specimens, until in the extreme form no punctuation 
