AND EASTERN NEW MEXICO. 19 



DEROBRACHUS SERVILLE. 



D. geminatus, piceus, nitidus, thorace valde transverse, antice non angustato, parce punctulato, 

 lateribus quadrispinoso, spina antica minore, elytris fere Itevigatis, margine augustiore reflexo. 

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



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

 elevatis exasperatis. 



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. 



PRIONCS GEOFFROY. 



P. Clirvatlis, 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 grosse punctatis, obsolete costatis. Long. TO 1'6. Tab. I, 

 fig. 14 (mas). 



Mas antennis crassissimis valde imbricatis 2 1 ? 30-articulatis, articulis subtus valde incisis (a). 



Femina antennis tenuibus imbricatis, 25-articulatis, articulis subtus sinuatis (6). 



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



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



P. emarginatus, piceug, nitidus, thorace pnnctatissimo, flavo-piloso, antrorsura angustato, 

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

 14-articulatis. Long. -75. Tab. II, fig. 13 (mas). 



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



SAY, Journ. Acad. Nat. Sc. Ill, 327 ; LEC. ibid. 2nd ser. II, 10T. 



Kansas and New Mexico, near the Rocky Mountains. 



CRIOCEPHALUS MULS. 



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

 piano ad latera granulis parcis exasperato, utrinqne profunde lunatim excavato, medio subcanali- 

 culato, ad basin fovea maiuscula 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 ultimis quatuor subito brevioribus. 

 Long. -96. 



Kansas and New Mexico. Differs from C. agrestis 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, 



