350 Mr. F. P. Pascoe on new Genera 



thorace fortiter tuberculato, tuberculis conicis irregulariter ad- 

 spersis; scutello subcirculari ; elytris subseriatim [punctatis, 

 tuberculis conicis numerosis internatis ; corpore infra subnitido, 

 subtiliter punctulato. Long. 4| lin. 



Hob. Rio de Janeiro. 



Calymmns asperulus. 



C. brevior, fuscus, antennis pedibusque subferrugineis ; prothorace, 

 in medio longitudinaliter excavato, elytrisque tuberculis conicis 

 magis adspersis, aliisque minoribus numerosis granuliformibus 

 intermixtis; corpore infra ferrugineo, fere impunctato. Long. 



Hah, Columbia. 



Bolitoxenus hifurcus. 



B. sat latus, modice convexus, niger, indumento fusco tectus, supra 

 irregulariter tenuiter tuberculatus ; eapite valde transverso ; pro- 

 thorace duplo latiore quam longiore, aiitice gradatim angustato, su- 

 pra ante medium cornibus duobus horizontalibus sublyratis, apice 

 plumosis, armato ; elytris breviusculis, paralleHs, prothorace paulo 

 latioribus ; antennis, palpis pedibusque ferrugineis. Long. 3| lin. 

 (sine cornibus). 



Hob. Penang. 



Much narrower than B. gihher^ Motsch., with two rather 

 long horizontal horns, as in DysanteSj but not tapering towards 

 the tip. What I think may be the female has two callosities 

 in place of horns, as in both sexes of B. gibber. 



Heledona nasalis. 



H.{S) breviter cyliadrica, nigra, opaea, squamositate fusca adspersa ; 

 eapite inter oculos planato, clypeo antice in laminam latam erectam 

 recurvato ; antennis palpisque rufo-testaceis ; prothorace supra 

 sparse nitide granulato, utrinque crenato, antice cornibus duobus 

 horizontalibus, validis, quadratis, apice truncatis et dilatatis, ar- 

 mato ; scutello subsemicirculari ; elytris latitudine vix sesquilon- 

 gioribus, singulis costis novem interruptis instructis ; corpore infra 

 pedibusque ferrugineis. Long. 2| lin. 



Hab. Penang. 



The female differs only in having the head and prothorax 

 unarmed ; a stout species, much shorter proportionally than 

 H. vacca, Motsch. {BoUtophagus) , which has longer and subu- 

 late prothoracic horns*. 



* There is some confusion in Gemminger and Harold's Catalogue, the 

 Ceylon Byrsax cornutus, Fab. ( Trox), being referred to Bolitothems, Cand., 

 a genus founded on Opatrum cornuttwi, Pauz., a North- American insect 

 identical with the subsequently described Opatrum bifurcum, Fab. 



