442 REVISION OF THE ELATERIDjE 



23. C. furtivus, elongatus, linearis, reneo-piceus, cinereo-pubescens, thorace latitudine longiorc, 

 antrorsura vix angustato, lateribus rotundatis, punctato, postice profunde canaliculato, elytris striis 

 punctulatis, intcrstitiis fere plania, sat dense punctulatis, pedibus piceis. Long. "45. 



One male specimen, Oregon. This species exactly resembles C. appressifrons in ap- 

 pearance; the third joint of the antenna 1 , however, is not dilated, and the elytra arc 

 slightly obliquely attenuated behind the middle; the front is almost flat, and the declivity 

 commences along a straight line, which gives a quadrate appearance to the front, and in- 

 dicates an osculation with Limonius. 



24. 0. a tropurpureus, elongatus, linearis, cupreo-piceus, cinereo-pubescens, thorace latitudine 

 longiore, convexo antice angustato, lateribus postice subrectis, antice rotundatis, sat dense punctato, 

 canaliculato, elytris striis vix punctulatis, interstitiis planiusculis parce punctulatis, epipleuris pedi- 

 busque rufis, antennis piceis. Long. "44. 



Melsheimer, Proc. Acad. Nat. Sc. 2, 215. 



I have only seen the typical female specimen in Dr. Melsheimer's collection; it was 

 found in Pennsylvania. The antennas are hardly as long as the thorax, and the third joint 

 is not at all dilated. The front is as in the preceding species. 



A.— 4. 



25. C. appressifrons, piceus, obsolete amescens, cinereo-pubescens, cylindricus, postice obtusus, 

 thorace latitudine longiore, antice non angustato, lateribus fere rectis, angulis posticis acutis divaii- 

 catis, sat punctato, postice canaliculato, elytris striis acutis, punctulatis, interstitiis fere planis punc- 

 tatis, epipleuris pedibusque rufo-piceis. 



Mas, thorace latitudine fere sesqui longiore, niodice convexo: antennis thorace longioribus. Long. 

 •45— -5. 



Mater appressifrons Say, Ann. Lye. 1, 267; Harris, Insects Injurious to Vegetation, 1st, 49; 2d, 48. 



Corymbetes cylindriformis % Germ. Zeitschr. 4, 64. 



Femina, thorace latitudine paulo longiore, magis convexo: angulis posticis minus productis; anten- 

 nis thorace brevioribus. Long. -6 — -72. 



Elater brevicornis Say, Ann. Lye. 1, 265. 



Corymbetes parallelopipedus Germ. Zeitschr. 4, C)G. 



Middle States, abundant. We are indebted to Dr. Harris for the discovery of the in- 

 teresting difference in form, in the sexes of this species. 



For the reasons upon which I refuse to adopt Germar's opinion, that this is the Elater 

 cylindriformis Herbst, see the remarks under Limonius cylindriformis. 



A.— 5. 



26. C. obscurus, ater, subtilitcr nigro-pubescens, subparallelus, fronte concava thorace latitudine 

 non longiore, antrorsum vix angustato, lateribus late rotundatis angulis posticis brcviusculis, parum 

 convexo, confertim punctato, linea dorsali vix conspicua lffivi, elytris pone medium subattenuatis, 

 striis tcnuibus, interstitiis fere planis confertim punctulatis. Long. "46. 



One specimen, California, Mr. Pease. ' Body moderately elongated, not dilated on the 

 sides, black, not very shining, finely pubescent with grayish black hair; head broadly 

 concave, punctured; thorax not longer than wide, slightly convex, densely punctured, 



