Rhynchophorous Coleoptera of Japan. 85 
in the fewer and stronger tubercles of the prothorax, the 
more scattered punctuation of its base, which presents a 
smooth central line, and the finer elytral striz, which in 
H., tristis are strong and well-marked. It is also rather 
more elongate. 
Hypothenemus expers, sp. 1. 
Oblongus, subnitidus, piceo-niger, prothorace medio dilutiore, 
subrotundato, ante basim dilatato, margine antico bituberculato, 
dorso anterius tuberculis discretis in plaga rotundata compositis 
notato, posterius granulato; elytris lineato-punctatis, pilosis, 
interstitiis setis haud squamatis seriatis ornatis. ong. vix 2 mm. 
Two examples, Kumamoto and Nagasaki. 
Closely allied to H. peritus, but exhibiting the 
following differences :— 
Rather larger and more robust, darker in colour, being black 
with a pitchy tinge, the thorax pitchy-red in middle, and not 
obscurely testaceous. Front of head more convex, very finely 
reticulate and not punctured except over mouth, where it is trans- 
versely impressed. Antenne bright testaceous, basal joint of club 
deeply infuscate, funiculus 5-jointed. Frothorax more strongly 
dilated before base, which is truncate, sides more strongly rounded, 
its tuberculation similar, but marginal tubercles less prominent, the 
two outer ones nearly obsolete, basal half closely reticulate and 
covered with small asperate elevations, closer than the non-elevated 
punctures in H, peritus. Elytra narrower than greatest width of 
prothorax, truncate at base, obliquely rounded at apex, striation 
as in H. peritus ; interstices without evident scales, but with a 
single row of erect hairs, which are stronger towards apex, a few 
finer hairs are found between the rows. Legs clear testaceous. 
The absence of the conspicuous erect hispid scales on 
the elytra, which are replaced by hairs, will at once 
distinguish this species from either of the two former. 
Cosmopgrzs, Hichh. 
This genus was founded by Hichhoff, Rat. Tom., p. 495, 
for OC. monilicollis, % single species from India, which 
differs from Hypothenemus (Stephanoderes, Kichh.) in 
possessing a very short two-articulate antennal funiculus 
and dilated tibiae with their outer borders serrate, the 
serration being absent in Hypothenemus; the typical 
species is also more elongate than a Hypothenemus, and 
