BLAcKBURN AND SHARP—On some New Species and Genera of Coleoptera. 181 
2. A. mauiensis, Bl—A single specimen, taken on Lanai at an elevation of 
about 2000 feet, is possibly referable to this species, though more probably only 
requiring the collection of more specimens to be proved distinct. The specimen 
is evidently much abraded, and therefore the proportions of the parts are difficult 
to compare with the same in a specimen pretty well clothed with sete, but the 
thorax appears to be narrower, and the sculpture of the whole insect (though 
similar in plan to that of A. mauiensis) is much feebler; moreover, instead of the 
hinder part of the elytra bearing white spots, nearly the entire apical third is 
white. 
AL 18%, 
CHZNOSTERNUM (noy. gen. Cryptorhynchidarum). 
This new generic name I propose for an insignificant-looking insect, which bears 
a general resemblance to an Omias, but has the rostrum and sternum exaggeratedly 
eryptorhynchiform. The following are its characters :— 
Rostrum and antennz very much as in Acalles, the second joint of the funiculus 
in the latter being rather small; eyes coarsely facetted, rather depressed, and not 
visible from above. Thorax much like that of Acalles, but with the surface nearly 
free from inequalities; it is somewhat abruptly constricted a little in. front of the 
middle, and has ashort longitudinal fovea in the middle of the base, not extending 
so far as half way towards the front of the thorax; the anterior margin is strongly 
produced over the head. There is no scutellum visible. The elytra are exactly 
of the width of the thorax at their base, becoming very much wider in the anterior 
third of their length, then gradually but strongly accuminated to the apex; the 
sides very strongly rounded, the surface free from inequalities but deeply striated, 
the strie coarsely punctured, the interstices regularly, strongly and roundly 
convex. The channel for the reception of the rostrum is very deep. The 
mesosternum is not at all emarginate, but abruptly truncate between the middle 
of the intermediate coxee, and forms the posterior end of the rostral channel, but 
does not extend at all along its sides, the hind portion of its sides being limited 
by the extreme anterior part of the intermediate coxz, in the same way that its 
sides on the prosternum are partly limited by the anterior coxee, and there being 
between the anterior and intermediate coxze a gap in the sides of the channel. 
The intercoxal process of the hind body is wide and quadrate, with its anterior 
margin squarely truncate. The metasternum is very narrow. ‘The second 
segment of the hind body is nearly as wide as the third and fourth taken together, 
and is separated from the first by an arched suture. My specimen is perfectly 
glabrous, but may possibly be abraded. The tarsi are very decidedly more slender 
than in Acalles. The genus is near Acalles, Tragopus, and Anaballus. The form 
of the rostral channel strongly separates it from the latter two—the form of the 
intercoxal process of the hind body from Acalles, the coarsely facetted eyes and 
unarmed femora from 'Tragopus. 
Mtr, 18% 
