454 REVISION OF THE ELATERID.E 



Georgia and Texas; South America, according to Germar. The posterior angles of 

 the thorax are long, acute, and carinated; there are no basal fissures. 



2. C. texanus, obscure castaneus, dense longius helvo-pubescens, thorace confertim punctato, 

 antrorsum angustato, latitudine non longiore, lateribus rectis antice rotundatis, elytris fastigiatis, 

 muticis, striis punctatis, interstitiis confertim punctatis et rugosis, pedibus rufescentibus. Long. •". 



Two specimens collected by Mr. Schott, of the Mexican Boundary Commission, at. 

 Eagle Pass, on the lower Rio Grande. Only differs from the preceding by the thorax- 

 being shorter and distinctly narrowed anteriorly. 



Atractopterus Lee. 



Frons inodice convexa, lateribus oblique marginatis, margine fere ad apicem extendente, fossulis 

 antennarum bene definitis distantibus: labrum subemarginatum: mandibular versus apicem den tatre 

 apice acutfc: antennre serratre, articulo l mo breviusculo, 2 ct 3 subcylindricis, illo breviore, 4 — 10 

 triangularibus, ll m0 apice subacuminato: palpi articulo ultimo parum dilatato apice rotundato: pres- 

 ternum antice breviter lobatum, mucrone postico vix inflexo, sutura laterali non excavata, oblique 

 concava: mesosternum non protuberans: coxre posticre laminis angustis, intus parum dilatatis, dente 

 interno minusculo acuto: tarsi a?qualiter pubescentes, filiformes, articulo l m0 vix longiore, 2 — 4 sen- 

 sim paulo brevioribus, 5 t0 prrecedentibus 3 requali unguiculis maiusculis intcgris. 



Differs from Crigmus by its convex front, and less elongate first tarsal joint ; from Lu- 

 dius by the narrower, less dilated, and less dentate coxal lamina). The form of body is 

 narrow and fusiform, being narrowed each way from the base of the elytra, which are 

 acute at the tip; the posterior angles of the thorax are acute, and carinated; there are 

 no basal fissures. 



1. A. fusiformis, nigro-viridis, cinereo-pubescens, thorace punctato, latitudine longiore, antror- 

 sum angustato, lateribus rectis, angulis posticis elongatis, s.Tpe testaceis, elytris piceo-testaccis, stri- 

 atis, interstitiis paulo convexis sat dense punctatis, apice subacutis, pedibus testaceis, antennarum 

 articulo l m0 rufo. Long. "55. 



Lake Superior, not rare. It is the Pristi/ophiisftsiformis of my catalogue in Agassiz' 

 Lake Superior. 



2. A. viridanus, ferrugineus, supra piceo-rencus, tenuitcr cinereo-pubescens, thorace latitudine 

 longiore, subcylindrico, lateribus rectis, ad apicem rotundatis, parco punctato, margine omni ferrugi- 

 nco, pone medium canaliculato, ante medium utrinque fovea profunda impresso, elytris striis punctatis 

 vix imprcssis, interstitiis planis, parce punctulatis, antennis nigris basi rufis. Long. "35. 



JElater viridanus Say, Ann. Lye. 1, 250. 



Ulater sublucens Randall, Lost. Journ. Nat. Hist. 2, 37. 



Pennsylvania, Dr. Mclsheimer. A small species, looking like a Dolopius, and very re- 

 markable by the two deep fovese before the middle of the thorax; the form is less cuncate 

 than that of the preceding species; the thorax is almost parallel on the sides, and the 

 elytra slightly rounded in their outline. The vertex is marked with a longitudinal fovea, 

 as in Dolopius, from which, however, it differs essentially by its less convex front, and 

 shorter basal joint of the antenna. 



3. A.'incongruus, tenuitcr cinereo-pubescens, capitc thoraccquc olivaccis, opacis, confertim 

 punctatis, thorace latitudine longiore, lateribus postice parallels ante medium late rotundatis, sa:pe 



