169 
the scutellum, post scutellum, and metathorax the 
punctuation becomes shallow, sparing, and decidedly 
coarse (while there is also a fine and close punctua- 
tion), and the hairs are long and whitish. The basal 
segment of the hind body is clothed with long whitish 
hairs, the remaining segments and near the apex are 
devoid of hairs (in my specimen possibly abraded), 
and on the penultimate and apical segments there are 
traces of golden pubescence. The punctuation of the 
hind body even to the apex is almost obsolete. The 
apical third of the 2nd ventral segment is strongly 
flattened or even a little concave in the middle, 
nearly the whole of the 3rd segment is distinctly 
concave and the remaining segments are all strongly 
flattened. 
A single specimen of this very distinct insect occurred on 
Konahuanui, Oahu, at an elevation of about 2,500 feet. 
My collection contains a specimen of a female Grahro with 
yellow mandibles, taken at Oahu, that may possibly 
prove to be ? ahnormis, with the punctuation not 
quite in its typical condition. It resembles the d iii 
the brilliancy of the silvery pilosity on the clypeus, 
and in other points. Its eyes are considerably more 
strongly facetted. The punctuation differs slightly ; 
on the mesothorax it appears a trifle more sparing 
and rugose, while the metathorax is smoother and 
more evenly punctured. 
42. — Ceabro unicolor. 
Grahro unicolor, Smith, Cat. Hym. Ins. IV., p. 421. 
I have not seen the original description of this insect ; my 
own examples were named by Mr. Smith. As com- 
pared with other Hawaiian species, the eyes appear 
to be separated by about the usual space (or even a 
little more) and to be facetted rather coarsely. The 
shape of the hind body is similar to that of G. man- 
