UNITED STATES AND MEXICAN BOUNDARY. 17 



which commence immediately at the respective angles. It belongs with the other 

 Western species to the division Psilocnemis Burm. 



C. squamulosus, piceo-uiger confertitn punctatus, punctis squatuulis pallidis minutis notatis, thorace 

 lateribus subangulatis, angulis anticis mammillaribus, haud prominulis, fovea magna interna rotundata 

 signatis, angulis postieis parvis rectis sulco circumdatis, dorso subcanaliculato, ad basin depvesso ; mento 

 valde concavo, postice anguste inciso. Long. -40. 



Florida, Baron R. Osfen Sacken. Nearest in appearance toC. canaliculatus, 

 but smaller, with the fovea at the anterior angles of the thorax larger, and the punc- 

 tures smaller. The scales of the punctures both on the thorax and elytra readily 

 distinguish it. The incision of the mentum is narrow. 



Thrincoptge Lee. 



T. alacris, elongato-oblonga, kete viridi-senea nitida, capite grosse rugose punctato, fronte inaurata, 

 thorace latitudine breviore antrorsum latiore, et transversim valde convexo, angulis anticis rotundatis, 

 lateribus subrectis, basi utrinque recta obliqua, angulis postieis obtusis, parce subtiliter punctato, ante 

 basin transversim itnpresso, margine laterali guttisque ad apicem pluribus laste flavis ; eljtris fortiter 

 marginatis, lateribus subsinuatis, postice oblique angustatis, ad apicem truncatis, striato-punctatis, striis 

 postice exaratis, interstitiis Iambus, macula antice transversa in marginem ad humerum extensa, altera 

 majore ad medium, tertiaque postica elongata laete flavis ; coxis postieis macula flava ornatis. Long. *8. 

 Variat elytrorum maculis plus minus deficientibus, antica ssepe divisa. 



One specimen, Arizona, Mr. Schott. Numerous specimens from New Mexico were 

 brought by Capt. Pope. Congeneric with Buprestis ambiens Lee, and having somewhat 

 the form of Agrilus, though apparently related to Ancylochira. Antennas shining, 

 joints 3 — 6 successively wider, 7 — 11 triangular, with pores on the inferior edge. The 

 labrumis small; the antennas distant, inserted in small foveas; the mandibles carinated, 

 acute ; the mentum closely united to the ligula, transverse, truncate, convex, entirely 

 corneous. The sterna are not sulcate, mesosternum divided for only half its length. 

 Legs unarmed, tarsi with broad equal joints, fifth depressed with widely divergent 

 ungues. Scutellum small triangular. The fifth ventral segment of the abdomen is 

 marked with a deep marginal groove around its posterior half; the groove each side 

 ends suddenly in a small yellow spot. I cannot refer these species to any previously 

 described genus. 



Telepborus p 1 a n i c o 1 1 i s, fusco-niger, tenuiter parce pubescens, capite ante oculos pallido, thorace 



pallido, vitta dorsali fusca, latitudine fere duplo breviore, parum convexo, lsevi subiuaequali undique 



anguste marginato, elytris thorace haud latioribus minus subtiliter scabris. Long. -33. 



One specimen, May 29th, Capt. Pope. Belongs to my division a. (Proc. Acad. 5, 



340,) the outer claw of the posterior tarsi being armed with a large tooth : the thorax 



is comparatively less convex than usual, and the discoidal impressions are very vague : 



the reflexed margin is narrow, and equal at the sides, at the apex and the base; the 



2nd joint of the antennas is one third the size of the first or third which are equal. 



The head and thorax are pale beneath, but the legs and trunk are entirely black. 



5 



