ACENTKOPTERA. 121 



Genus XXXIV. ACENTROPTEEA, Chevr. MSS. 

 Details, Tab. II. Fig. 14. 



Antenna' (fig. l-ia) breves, robustae, ad apicem siibincrassatae, articulo 

 primo bre\'i, iiicrassato, secundo ilio longiori, oblongo, tertio 

 paiillo elongato, tribiis proximis longitudine perpanim decres- 

 centibus, quinque scquentibiis brevibus, fere sequalibiis, paiillo 

 incrassatis, iiltinio pavillo longiori, subaciito. 



Lahrum (fig. 14 h) transversum, apice subemarginatum. 



Mandihidce (fig. 14c) magna?, apice dentatae. 



Pcdjji maxiUares (fig. 14 d) articulo primo minute, duobus proximis 

 bre^-ibus, obconicis, oblique truncatis, ultimo paullo elongato, 

 subfalciformi, apice acuto ; lahlales (fig. 14 e) articulo primo 

 paiTo, secundo subelavato, ultimo elongato-ovato, leniter cur- 

 vato, apice acuto. 



Mentum (fig. 14/) subpentagonum, lateribus leniter constiictum, 

 apice obtusum ; ligula (fig. 14(/) crassa, apice rotundata. 



Cajjut antice inter antennas creta elevata instructum. 



Thorax subquadratus, angulis anticis prominulis. 



Elytra oblonga, stepe postico pauUo ampLiata, apice rotundata ; hu- 

 meris ijrominulis. 



Pedes breves, robusti. 



Propectus inerme. 



Corpus late elongatum, dorso subdepressum. (Type, Acentroptera 

 pidchella.) 



Acentroptera approaches very closely to Cephahdonta, and, although 

 dissimilar in habit, is difiicidt to separate from that genus ; the 

 principal differences appear to be in the short, robust, subincras- 

 sate antennae, the five teiTninal joints of which are nearly equal and 

 slightly thickened, forming an indistinct club, and in the absence (as 

 far as the materials before me show) of the spine at the apex of the 

 anterior tibiae in the male. The general form is very similar to that 

 of the first group in the genus Cephahdonta ; the elytra are rounded 

 and entire at the apex, theii- posterior angles being entirely obsolete ; 

 the shoulders are less prominent, their apex being always obtusely 

 I'oimded. 



1. Acentroptera pulchella, Guer. Tab. VIII. Fig. 7. 



A. subelongata, " sangiunea ; antennis apice fuscis ; elytris luteis, 

 valde striato-punctatis, circuitu macuHsque quadratis duabus 

 communibus sanguineis." 



Var. A. Elytrorum maculis nigro-\aridibus. 

 Long. 5-6 lin. 



