Coleoptera from the Hawaiian Islands. 529 
and its legs are very thick, the femora being much 
incrassate. The female has the front of the head pro- 
duced into a moderately long polished rostrum. I have 
before me only a single pair, of which the female is not 
in good condition, and I do not know whether the great 
sexual disparity is a constant character of the species. 
It is somewhat allied to P. vestitus. 
_ Mr. Blackburn discovered this species by beating trees 
in a forest behind the Palolo Valley, Oahu. 
Proterhinus gracilis, n.s. 
Angustulus, gracilis, nigricans, pedibus rufo-nigris, 
antennarum basi tarsorumque lobis rufis; prothorace 
tri-impresso; elytris obscure rufo-variegatis, parum 
squamoso-maculatis, setulis brevibus erectis sparsim ad- 
spersis, humeris antrorsum acutis. Long. 24 mm. 
?. Antenne about as long as from the tip of rostrum 
to base of thorax, black, with the basal joint red, and 
the 2nd joint more obscurely red ; this is also rather elon- 
gate, being but little shorter than the 3rd; the three 
apical joints not greatly different from the others. Eyes 
but little convex. Thorax slender, rather longer than 
broad, black, coarsely but indistinctly sculptured, 
sprinkled with distant, depressed white sete; with three 
rather indistinct impressions, a large one in the middle in 
front, and one on each side about the middle ; the anterior 
part is not abruptly narrowed, so that there is little 
appearance of constriction. Hlytra narrow, especially 
at the shoulders, which are acute and prominent, very 
coarsely, but (in this unique individual) indistinctly 
punctate, of a dark fuscous or blackish colour, dull, with 
some indistinct red marks, and small patches of white 
squamosity, bearing also a few rather short white sete. 
Femora nearly black ; tibie obscure red; the lobes of 
the tarsi distinctly paler. 
This insect is narrower in form than most of the other 
species ; it is perhaps most similar to P. debilis, but is 
abundantly distinct therefrom by the shape of the 2nd 
joint of the antenne, by the more slender thorax, with 
more distinct impressions, and by the acute humeral 
angles of the wing-cases. 
Found on Mauna Loa, Hawaii; elevation about 4000 
feet. 
TRANS. ENT. soc. 1881.—PaRT Iv. (DEC.) 3 Z 
