304. Mr. J. S. Baly's descriptions of new genera 



ChcBtocnema Sieinheili. 



Ovata, convexa, nitida, subtus nigra, pedibus piceo- 

 fulvis, femoribus posticis piceo-cupreis ; supra cuprea, 

 granulosa, antennis fulvis, extrorsum piceis ; capite minute 

 et remote punctate ; thorace tenuiter, sat remote punctato ; 

 elytris minus fortiter, regulariter punctato-striatis, inter- 

 spatiis impunctatis, externis leviter incrassatis. 



Long. § lin. Hah. — Columbia; Magdalena River. 



Head not longer than broad; eyes distant; forehead 

 broad; vertex and front finely and remotely punctured; 

 oblique grooves separating the interocular spaces from the 

 front distinct, finely impressed; clypeus not distinctly 

 separated fr-om the upper face ; antennse half the length of 

 the body, robust, slightly thickened towards the apex, the 

 foiir basal joints fulvous, the rest piceous ; second to the fifth 

 joints nearly equal in length; the second thickened, two- 

 thirds the length of the basal one. Thorax twice as 

 broad as long; sides rounded, slightly sinuate at the base, 

 the anterior angles thickened; above convex, the hinder 

 margin distinctly reflexed ; surface granulose, finely punc- 

 tured, the punctures rather coarser and rather more 

 closely placed than those on the head. Elytra broader at 

 the base than the thorax, attenuated from the middle to 

 the apex; above convex, closely united at the suture, 

 nitidous, regularly punctate-striate, interspaces granulose, 

 thickened on the outer disk. 



Very similar in form, both of body and antennse, to 

 C. Blanchardi, but differing in its smaller size, and in its 

 broader, distinctly punctured head. 



ChcBtocnema separata. 



Elongato-ovata, convexa, nitida, subtus nigra, pedibus 

 fulvO'piceis, femoribus posticis obscure cupreis; supra 

 asneo-cuprea, antennis nigris, basi fulvis; thorace granu- 

 loso, tenuiter, subremote punctato; elytris nitidis, fortiter 

 punctato-striatis ; interspatiis ad apicem convexis, externis 

 totis convexis. 



Long. 1 lin. Hab. — Bogota. 



Head subtrigonate ; vertex and front granulose, im- 

 pressed on either side near the eye with four or five deep 

 punctures; grooves separating the interocular space from 

 the front deeply impressed ; clypeus transverse, trigonate, 



