NATURAL SCIENCES OP PHILADELPHIA. 337 



Pelecyphorus Sol. 



P. sgrotus, ater opacus, thorace latitudinjs haud breviore, lateribus late 

 rotundatis serratis, postice subangustato, et lateribus sinuato, angulis posticis 

 acutis, basi late emarginato, lateribus et plaga dorsali postica transversim ru- 

 gose punctatls ; elytris thorace duplo latioribus, ovalibus postice valde declivibus 

 et prolougatis, humeris rotundatis, margine costaque discoidali postice magis 

 elevata et abbreviata rugis transversis undulatis elevatis connexis, epipleuris 

 sublaevibus. Long. -90. 



One specimen. Cape San Lucas. In general appearance resembles in an 

 extraordinary manner P. morbillosus Lee. (Pr. Ac. 1858, 74), but, besides 

 minor differences, the humeri are not toothed but rounded. 



P. bifurcus, ater, subnitidus, thorace punctato valde convexo, lateribus 

 rotundatis, basi sinuato, angulis omnibus acutis, margine anguste reflexo, dorso 

 profunde canaliculato ; elytris postice sensim latioribus, basi subemarginatis, 

 angulo humerali distincto obtuse, parce punctatis, margine elevato pone trien- 

 tem duplici. Long. -73. 



One specimen. Cape San Lucas. The elevated lateral margin of the elytra 

 bifurcates at the anterior third, the portions then diverge, neither reaching the 

 tip; the inner is a little more elevated, but also a little shorter than the outer 

 portion. 



P. sexcostatus. sordide niger, parce pubescens, thorace latitudine paulo 

 breviore planiusculo, lateribus late rotundatis anguste reflexis, angulis acutis, 

 haud dense punctato ; elytris elongato-ovalibus, parce punctatis, margine later- 

 ali serrulato costisque dorsalibus duabus, (interna integra, altera utrinque 

 abbreviata) acute elevatis. Long. -50. 



One specimen. Cape San Lucas. In form somewhat resembles P. paral- 

 lel u s Lee, but the sides of the thorax and elytra are more rounded. 



Centrioptera Mann. 



C. spiculifera, nigra, subnitida, thorace latitudine breviore, postice au- 

 gustato lateribus valde rotundatis, postice breviter paulo sinuatis, angulis pos- 

 ticis rectis ; elytris elongato-ovalibus, thorace parum latioribus, seriatim punc- 

 tatis, interstitiis internis planis parce uniseriatim punctatis, ad apicera et ex- 

 ternis tuberculis valde acutis ornatis, femoribus posticis intus tuberculis exas- 

 peratis. Long. 1-08. 



Larger and stouter than C. m u r i c a t a Lee, with the tubercles more acute 

 and more elevated, so as to become towards the apex actual short spines ; the 

 sides of the thorax are also not strongly punctured. 



Cryptoglossa Sol. 

 C. seriata, nigra subnitida, thorace latitudine breviore, parum convexo, 

 postice modice angustato, lateribus rotundatis postice subsiuuatis, angulis pos- 

 ticis rectis, elytris subovatis, postice subacutis, seriatim punctatis, interstitiis 

 parce uniseriatim punctatis, externis postice tuberculis parum elevatis exaspe- 

 ratis. Long. -75 -86. 



Cape San Lucas. Has very much the form of Centrioptera, but the hiad 

 thighs are not at all serrate. 



Cerenopus Lee. 



C. cribratus, niger, subnitidus, thorace ovato, convexo, latitudine longi- 

 ore, basi late subemarginato, elytris seriatim cribratis, ad apicem utrinque 

 tuberculo magno obtuso, alteroque parvo suturali armatis. Long. -55 -71. 



Mas tibiis antfeis introrsum sinuatis, et serratis, femoribus posticis dente 

 magno acuto armatis. 



Femina tibiis anticis crassioribus haud serratis femoribus posticis simplici- 

 bus. 



Cape San Lucas. Of the same general form asC. coacolor Lee. 



1861.] 



