AND EASTERN NEW MEXICO. 19 



DEROBRACHVS SERVILLE. 



D. CHiili:if u*, piceus, nitidus, thoracc valde transverse, antice non angustato, parce punctulato, 

 latcribus quadrispinoso, spina antica minore, elytris fere liuvigatis, inarginc angustiore reflcxo. 

 Long. 2-9. Tab. II, fig. 12 (femina). 



Mas minor (long. T5 2 25), an tennis longioribus crassioribus (fig. 12 a), pedibus anticis punctis 

 elevatis exaspcratis. 



LEC. Proc. Acad. Nat. Sc. VI, 223. 



New Mexico and Texas. The only female yet obtained was collected at Albu 

 querque, by Dr. T. C. Henry; several males were afterwards found by Messrs. 

 Schott and Clark, of the Boundary Commission, at various places in Texas. 



PRIONirS GEOFFROY. 



P. cnrratiiK. piceus, thorace subtiliter parce punctulato, spina anteriore tenui valde acuta, media 

 hamata, angulis posticis subrectis prominulis, elytris subtiliter parce punctulatis et rugosis, spina 

 suturali distincta ; oculis magnis, antennis 12-articulatis. Long. 2 06. 



One female from near Santa Fe. Resembles nearly P. californicus Motsch. 

 (crassicornis Lee.), but the anterior spine of the thorax is more slender, and the 

 middle one is curved backwards ; the elytra are somewhat less punctured and 

 rugose, but this is not a good character, as judging from a large series of P. cali 

 fornicus, it seems subject to variation. 



P. fissicornis, nigro-piceus, nitidus, thorace subtiliter parce punctato, lateribus obtuse tridentato, 

 elytris thorace latioribus parce sat grossc punctatis, obsolete costatis. Long. TO TG. Tab. I, 

 fig. 14 (mas). 



Mas antennis crassissimis valde imbricatis 27 30-articulatis, articulis subtus valde incisis (a). 



Femina antennis tenuibus imbricatis, 25-articulatis, articulis subtus sinuatis (b). 



HALDEMAN, Proc. Acad. Nat. Sc. Ill, 125; LEC. Journ. Acad. Nat. Sc. 2d ser. II, 108. 



Platte river, New Mexico, and Texas, not rare. 



P. ciiiargiiintus, piceus, nitidus, thorace punctatissimo, flavo-piloso, antrorsum angustato, 

 lateribus ante medium unispinoso, angulis posticis rectis, elytris grosse parcius punctatis ; antennis 

 14-articulatis. Long. -15. Tab. II, fig. 13 (mas). 



Mas antennis crassis valde imbricatis, articulis 3 1 3 ad apiccm subtus valde emarginatis. Femina latet. 



SAY, Journ. Acad. Nat. Sc. Ill, 327 ; LEC. ibid. 2nd ser. II, 107. 



Kansas and New Mexico, near the Rocky Mountains. 



CRIOCEPHAL.US MULS. 



C. asperatllS, piceus tenuiter pubescens, thorace subtransverso, lateribus obtuse angulatis, dorso 

 piano ad latera granulis parcis exasperate, utrinque profunde lunatim excavate, medio subcanali- 

 culato, ad basin fovea mainscula impresso, elytris thorace parum latioribus, subtiliter rugosis, 

 lineis utrinque duabus elevatis; oculis modice prominulis, genis subacutis ; antennis corporis 

 dimidio vix longioribus, versus basin crassiusculis, articulis ultirais quatuor subito brevioribus. 

 Long. -96. 



Kansas and New Mexico. Differs from C. ayrcstis by the more flattened thorax, 

 with more numerous elevated granules, and distinctly angulated sides. The 

 antennae are also heavier, and do not differ remarkably in length in the two sexes, 



