444 revision or the elaterid.e 



Middle States, not rare. The tarsi are somewhat more densely pubescent than usual, 

 but by no means brush-like beneath, as in the large species with prominent mesosternum, 

 placed by Germar in the same genus with this species, but which I have removed under 

 the name Melanactes. 



31. C. maurus, ater, minus nitidus, tenuissime fusco-pubescens, subparallolus, fronte concava, 

 tlioracc latitudine longiore, lateribua postice parallelis antice rotundatis, angulis posticis acutis diver- 

 gentibus, leviter canaliculato, dense, lateribus confluenter punctato, elytris striis punctatis, interstitiis 

 fere planis sat dense punctatis et rugosis, antennarum articulo 3 10 subdilatato, 4'° non breviore. Long. 

 •63. 



Oregon, Col. M'Call. Sufficiently distinct from any other species herein described, and 

 apparently more nearly related to C. rethiops; the third joint of the antenna is triangular, 

 as long, but only half as wide as the following, which are acutely triangular, but not pro- 

 duced at the angle; the eleventh joint is not longer than the tenth, not acuminate, but 

 still distinctly constricted. 



A.— (3*.— a. 



32. C. vernalis, ater, tenuiter fusco-pubescens, thorace latitudine longiore, antrorsum angus- 

 tato, lateribus rotundatis, subtiliter punctato, angulis posticis divergentibus, elytris Icete flavis, macula 

 scutellari, alterisque utrinque duabus subrotundatis nigris, striis punctatis, interstitiis subtilissime 

 punctulatis, fere planis, antennre maxime serratis, articulo 3'° sequenti non minore. Long. "28. 



Germar, Zeitsclir. 4, 56. 



Mater vernalis Hentz, J. Ac. Nat. Sc. 5, 374; tab. 13, fig. 2: Say, Tr. Am. Phil. Soc. 6, 172. 



Middle, Southern, and Western States, rare. The third joint of the antennae is not 

 smaller than the fourth, but its outer angle is not produced. 



33. C. K end alii, nigro-cupreus, tenuiter cinereo-pubescens, thorace latitudine vix longiore, an- 

 trorsum angustato, lateribus rotundato, angulis posticis acutis divergentibus, convexo, profunde et late 

 canaliculato, punctato densius ad latera, elytris luteo-testaceis, striis punctulatis, interstitiis fere pla- 

 nis, subtilius punctatis, plaga elongata versus apicem suturaque purpurascentibus, antennis articulo 3'° 

 sequenti non minore. Long. - 6. 



Germar, Zeitsclir. 4, 57. 



Ctenicerus Kendalli Kirby, Fauna Bor. Amer. 149; tab. 2, fig. 7, (1837.) 



Elator anclwrago Randall, Bost. Journ. Nat. Hist. 2, 5, (1838.) 



One specimen, found on the north shore of Lake Superior. Mr. Randall found it in Maine: 

 Kirby's specimen was found in lat. 65°. The thorax is so deeply and broadly channelled 

 that the disc appears longitudinally elevated each side: the antenna) of the male are pec- 

 tinate. 



34. C. cuprascens, reneo-cupreus, requaliter cinereo-pubescens, thorace latitudine sublongiore, 

 antrorsum angustato, lateribus rotundato, angulis posticis elongatis, divergentibus, canaliculato, punc- 

 tato, densius ad latera, elytris striis punctulatis, interstitiis planis confertim subtilius punctulatis, pe- 

 dibus rufis, antennis piceis, basi rufesccntibus, articulo 3'" sequenti paulo minore, 11'"° non constricto. 

 Long. *63. 



6 



One specimen, Saratoga, Mr. James Thomson. Very similar to the next, but is more 

 robust than the female of that species: the principal differences arc that the antenna? have 



