COLEOPTERA, 
169 
Subgenus APODERUS, pr. d. 
Differentia sexualis in elongatione antennarum, rostri, capitis tho- 
racisque $ parum indicata. Articulus ultimus clavae antennarum in $ 
haud magis acutus quam in Q, nullo modo in spina apicali prolongatus 
aut auctus. 
In this subgenus I include all the species belonging to the Stirps I. 
of Schonherr, except Apod, scutellaris , the type of my subgenus 
Centrocorynus. 
It contains several typical forms, the principal characters of which 
may be briefly exposed as follows :— 
I. Apod, tranquebaricus , Westermanni and melanopterus are the 
extremes of an Asiatic group where the head is more or less 
oblong-subconic; the thorax conic in both sexes, or very 
slightly rounded in some females, obliquely strigose, canalicu¬ 
late, pulvinate anteriorly, with the apical margin rather deeply 
emarginate. The elytra are deeply punctate or foveate, their 
interstices are transversely rugulose or crenulate. The pos¬ 
terior femora are much extended behind the apex of the 
body. ( Strigapoderus , Jekel). 
II. Apod, quadripunctatus, indicus * unicolor , assamensis , $•<?., are 
the types of another Asiatic group, having the head and 
thorax rather elongate and conic, smooth, the latter slightly 
pulvinate and attenuate anteriorly; the scutellum more 
transverse, truncate ; the elytra simply punctate-striate, with 
the intervals even, either smooth or finely punctulate. The 
legs are elongate, proportionally slender; the tibiae more 
incurvate, especially the anterior, and the posterior femora 
much extended behind the apex of the body. This type is 
the most slender, narrow and parallel of the genus, showing 
us the smallest species. ( Leptapoderus , Jekel). 
* According to an Olivierian specimen in M. Chevrolat’s collection, 
Attelabus indicus is not a Casnonia, but an Apoderus, extremely allied 
to Apod, quadripunctatus. The two species, from Dupont, may be 
recognised in Mr. Bowring’s collection. 
