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



Chcetocnema Blanchardi. 

 Haltica cenea, Blanch. Gay. Hist. Chil. v. p. 557 (1851). 



Ovata, coiivexa, genea, nitida, subtus piceo-eenea, pedi- 

 bus rnfo-piceis, femoribus obscurioribus, antennis nigris, 

 basi rufo-piceis; thorace remote, tenuiter punctato; elytris 

 viridi-tinctis, pone medium attenuatis, regulariter, minus 

 fortiter punctato-striatis, interspatiis planis, interspatio 

 externo ante medium incrassato. 



Long. 1 lin. Hab. — Chili. 



Head subtrigonate ; vertex and front impunctate, finely 

 and irregularly granulose-strigose ; grooves separating the 

 interocular spaces from the front distinct ; encarpse and 

 carina entirely obsolete ; clypeus plane, clothed with grise- 

 ous hairs, separated from the upper face by an angular 

 groove ; labrum black ; antennge half the length of the 

 body, robust, slightly thickened towards the apex, five 

 outer joints black, the others rufo-piceous ; second to the 

 fifth joints equal in length. Thorax twice as broad as 

 long; sides converging from the base to beyond the middle, 

 thence more quickly rovmded to the apex, anterior angles 

 thickened, slightly produced, subacute ; upper surface 

 minutely reticulate-granulose, finely and remotely punc- 

 tured ; on the basal margin on either side is a single row 

 of deeper punctures. Scutellum transverse, broadly 

 rounded. Elytra broader than the thorax at the base, 

 sides attenuated from their middle to the apex; above 

 convex, distinctly and regularly punctate-striate, inter- 

 spaces plane, finely granulose-reticulate ; the anterior half 

 of the outer interspace thickened. 



Dibolia csnea, Waterhouse, described in the Ent. Trans, 

 for 1838, belongs to the present genus ; I have, therefore, 

 been compelled to change the name given by Blanchard 

 to the above insect; D. nigro-anea and ocArflcec!, Waterh. 

 are also true species of Chcetocnema. 



Chcetocnema rugiceps. 



Breviter ovata, valde convex a, cupreo-£enea, nitida, 

 tibiis, tarsis antennisque pallide piceis, his apice nigro- 

 piceis ; vertice tumido, rude rugoso ; thorace subfortiter 

 punctato, interspatiis granulosis; elytris fortiter punctato- 

 striatis, punctis in stria prima tota, et in secunda basi 



