AND EASTERN NEW MEXICO. 13 



labrum green ; thorax cribrate punctate, more than twice as wide as broad as long, 

 narrowed in front, very strongly rounded on the sides, narrowed a little towards 

 the posterior angles, which are rectangular and sharp. Elytra with rows of large 

 punctures, and with numerous deep impressed subconfluent spaces, which are 

 opaque, densely punctured and finely pubescent; tip entire. Legs green bronzed, 

 knees, tip of the tibia?, and tarsi steel blue. Tip of the abdomen very slightly 

 truncate in the male, rounded in the female. 



CHAUMOGNATHUS HENTZ. 



C. basalts, elongatus niger, thorace fulvo nitido, subrotundato, marginato, disco plus minus nigro, 

 elytris rugose punctatis, flavo-fulvis macula magna communi triangulari basali, tricnteque postico 

 nigris, abdomine flavo, ssepe nigro annulato, articulo ultimo nigro. Long. -42. 



Abundant near Fort Bridger and in the Black Hills : Dr. Hammond, Mr. Drexler. 

 Varies much in the size of the black spot of the thorax, which is sometimes emar- 

 ginate, and sometimes even divided into four dots. The antennae of the male are 

 as long as the body, of the female two-thirds as long. The thoraxan C. limbicollis 

 and scutellaris is opaque, while in the present it is very smooth and shining. 



NflPTUS BOIELDIEU. 



I. ventricilllis, rufo-piceus, nitidus, pube sordida minus subtili dense vestitus, thorace globoso, 

 grosse punctato, postice valde coarctato, tnberculis parum elevatis quatuor transversira positis, e 

 pilis efformatis ; elytris ovalibus, ventricosis, seriatim punctatis, setis erectis sat dense hispidis. 

 Long. -10. 



Santa Fe: Mr. Fendler. The elytra are twice as wide as the thorax, and about 

 one-half longer than wide ; the punctures are tolerably large and distant, and 

 become smaller on the declivous posterior portion. The second joint of the anten 

 na? is as long as the third. 



TRYPOPITYS REDT. 



T. ptinctatlis, elongatus, fuscus sericeo-pubescens, thorace ad basin utrinque transversim csca- 

 vato, et in medio breviter carinato, elytris striis e punctis digestis vix impressis. Long. -25. 



One specimen : Mr. Fendler. Precisely resembles in appearance T. sericeus, 

 (Xyletinus sericeus Say, Journ. Acad. Nat. Sc. V, 171), but the thorax is less deeply 

 excavated at base, and the striae instead of being deep and cribrate are hardly im 

 pressed, and the interstices are flat. 



PACTOSTOMA LEG. 



P. anastomosis, piceus, pilis sordidis setiformibus parce vestitus, thorace punctato, subcanali- 

 culato, latitudine breviore lateribus rotundatis marginatis, basi subtruncato, angulis posticis 

 obtusis, elytris ovalibus postice subacutis et declivibus, parce punctatis, sutura, rnargine costisque 

 tribus acute elevatis, quarum prima recta, secunda et marginal! (lexis cum prima confluentibus, 

 tertia irregular! utrinque valde abbreviata. Long. -42 5. Tab. II, fig. 11. 



LEG. Journ. Acad. Nat. Sc. 2d Sen IV, 19. 



Microachatia anastomosis LEG. Proc. Acad. Nat. Sc. VI, 446. 



Asida anastomosis SAY, Journ. Acad. Nat. Sc. 3. 



Pelecyphorus anastomosis LEG. Ann. Lye. Nat. Hist. V, 129. 

 anas/omosis LAC. Gen. Col. V, 159. 



