268 Mr. J. S. Baly on new Genera and Species of Hispidjc. 



prodnctis, humcris in spinam acutam lateraliter modice cxtensis ; 

 utroque quadricostato ; spina humcrali, vitta lata submargiiiali ab 

 humero ad longe pone medium extcnsa, apicc subdilatata, macula 

 prope angulum posticum fasciaque subaj)icali inter angulos ex- 

 tensa rufo-purpureis, aeneo tinctis, angulo postico metallico- 

 purpureo. 

 Long. 4 lin. 



Hab. Cayenne. 



This species may at once be distinguished from the rest of its 

 congeners by the form of the thorax, the sides of which, straiglit 

 for a very short distance at the base, are thence obliquely 

 narrowed to the apex, being but slightly sinuate behind the 

 apex ; its anterior angles produced into an acute tooth ; surface 

 depressed and indistinctly excavated transversely behind the 

 middle, rugose-punctate ; centre of disk in front nearly impunc- 

 tate, impressed with the usual longitudinal groove. Base of 

 epistome produced into a transverse ridge. Face furnished, 

 between the insertion of the antenna?, with an acute ridge. 



Genus Microrhopala, 



Corpus ovatuni, modice convexum. Caput exsertum, inter ocu- 

 los vix j)roductum ; cpistomate elevato, rugoso ; antennis validis, 

 subincrassatis, articulis 5 ultimis clavam elongatam formantibus, 

 7*"° duobus proecedentibus scquali aut longiore, g'^-H'"""^ inter se 

 coalescentibus, lineis suturalibus fere obsoletis ; mento elongate. 

 Thorax subconicus, subcylindricus, dorso depressus. Scutellum fere 

 transversum, apice obtuso. Elytra thorace latiora, leniter ovalia, 

 npice rotundata, angulo postico obsolete ; dorso modice convexa, pro- 

 funde punctato-striata. Pedes robust), mediocres, siraplices, tarsoriim 

 anticorum articulo basali parvo, sequentibus angustiore ; unyuicuHs 

 contiguis. 



Type, Microrhopala vittata, Fabr. North America. 



Microrhopala is so closely allied to Odontota that it is difficult 

 to separate it from that genus ; and possibly ultimately it will 

 merge into one of its numerous subdivisions ; for the present, the 

 ovate body will serve to separate it. 



Microrhopala vittata, Fabr. 



H. vittata, Fabr. Syst. Eleuth. ii. p. 64. n. 31 ; Oliv. Ent. vi. 770. n. 20, j)]. 2. 

 fig. 20 a, b. 



M. elongato-ovata, convexa, nigro- aut rufo-fusca ; antennis pedibus- 

 que nigris ; elytris punctato-striatis, interstitiis alternis subcos- 

 tatis, obscure fusco-seneis, utroque vitta lata fulva. 



Long. 3 lin. 



" Yar, a : thorace Isete rufo ; elytris cyaneis, vitta angustata margine- 



