CossonidcB of Japan. 29 
species is considerably larger, and a trifle less depressed, 
than the P. brachyjjus, and its rostrum and antennse are 
longer. The former is likewise a little narrower (rela- 
tively) and more arcuate, its prothorax is more rounded- 
outwards in the middle, its elytra are unmargined at their 
extreme base, and the hook and spine at the apex of its 
tibifB are somewhat more powerfully developed. The 
unique example from which the diagnosis has been com- 
piled appears to have been captured by Mr. Lewis near 
Yokohama. 
b. Rostrum hreviusculum, antennis hrevihus: tihiarutn 
spina apicalis mi?ius elongata. 
11. Pseudocossonus hrachypus, n. sp. 
P. pr^cedenti minor et paulo depressior, rostro anteii- 
nisque brevioribus (illo sensim latioribus), prothorace 
magis triangulari-ovato (i. e. pone medium, nee in medio, 
rotunda te ampliato), elytris paulo brevioribus, ad humeros 
obsolete subrufescentibus, necnon ad basin ipsam prope 
scutellum evidenter marginatis, tibiis ad apicem internum 
minus elongate spinosis. 
Long. Corp. lin. 2. 
Captus, semel tantum, ad Tomatzu, prope Nagasaki, 
in ins. Kushiu. 
As already implied, the present Pseudocossonus is a 
little smaller and more depressed than the preceding one, 
and its rostrum and antennae are shorter. The former, 
too, would seem to be a trifle broader, relatively, and less 
convex. 
The prothorax, moreover, of the P. hrachypus is more 
triangular (its widest point being behind, instead of at the 
middle): its elytra are distinctly margined at their extreme 
base (particularly on either side of the scutellum), with 
their humeral angles appreciably subrufe scent ; and the 
spinule at the inner apex of its tibife is not quite so power- 
fully developed. Like the P. brevitarsis it is unique, the 
single example having been taken by Mr. Lewis, at 
Tomatzu, near Nagasaki, in the island of Kushiu. 
Genus 10. Heteraethrus (nov. gen.). 
Corpus angustum, cylindrico-fusiforme, calvum, minus 
profunde sed supra dense sculpturatum, Igetius in elytris 
coloratum (nee omnino nigrum): rostro breviusculo, ro- 
