488 REVISION OF THE ELATERIDvE 



tion. The lobe of the prosternum is short, and hardly dcflexed, and not well denned from 

 the rest of the sternum. This species seems to have been confounded by Dr. Melsheimer 

 with the preceding: in fact his description agrees entirely with the preceding, except in 

 the description of the spots of the elytra. I have, however, retained Dr. Melsheimer's 

 name, as this specimen was placed as the type in his collection. It is quite possibly 

 identical with C. 4-pustuIatus, a European species, and may have become erro- 

 neously labelled as American. The state of the specimen, however, is very unsatisfactory. 



9. C- striatulus, ater, minus convexus opacus, tenuiter cinereo-pubescens, thorace latitudine 

 non longiore, antrorsum angustato, lateribus regulariter sat rotundatis, confertissime punctulato, linea 

 dorsali lsevi, elytris distincte striatis, interstitiis planiusculis dense rugose punctulatis, antennis pedi- 

 busque piceis, tibiis tarsisque subtestaceis. Long. - 14. 



Two specimens, Lake Superior. The lobe of the prosternum is short, broad, and well 

 defined by a deep transverse impression: the last joint of the palpi is rounded at the ex- 

 tremity as in C . p u 1 c h e 1 1 u s . 



10. C. pectoralis, piceus flavo-pubescens, thorace rufescente minus convexo, antice posticeque 

 angustato, lateribus rotundato, punctulato, linea dorsali lrevi, elytris vix obsoletissime striatis, confer- 

 tim punctulatis, plaga utrinque a medio fere ad basin extensa, alteraque apicali flavo-testaceis, an- 

 tennis pedibusque flavis. Long. -12. 



Mater pectoralis Say, Trans. Am. Phil. Soc. 6, 173. 



Middle States and Lake Superior, not rare. The lobe of the sternum is short, broad, 

 and tolerably deflexed: the posterior angles of the thorax as in the following species are 

 small, but the carina is distinct. Independently of colour, this species diners from the fol- 

 lowing by the thorax being much less convex, and by the traces of stria? visible on the 

 elytra. When the spots of the elytra are large, the latter appear yellow, with the margin, 

 suture and posterior fascia, blackish. Specimens occur in which the thorax is black, and 

 the spots of the elytra obsolete. 



11. C. obliquatulus, nigro-piceus, punctulatis, cinereo-pubescens, thorace convexo, antice pos- 

 ticeque angustato, lateribus magis rotundatis, elytris versus apicem testaceis, macula utrinque obliqua 

 ad medium alba signatis, antennis pedibusque flavis. Long. - 10 — '11. 



Melsheimer, Proc. Acad. Nat. Sc. 2, 214. 



Pennsylvania. Messrs. Melsheimer and Zeigler. 



12. C. f u t ilis, longiusculus pallide flavo-testaceus, albo-pubescens, capite picco, thorace quad- 

 rate-, antice posticeque vix angustato, lateribus late rotundatis, confertim rugose punctulato, linea dor- 

 sali hevi, elytris punctulatis, macula subscutellari, fasciaque pone medium infuscatis. Long. -08. 



San Diego, California, in wet sand. This is the smallest species I have seen. The 

 thorax is broadly rounded on the sides, and not very convex: the posterior angles are 

 very minute, but the carina is distinct: the lobe of the prosternum is short, and defined 

 by a transverse impression. 



13. C. i n o p s, piceus, cinereo-pubescens, thorace latitudine paulo breviore, convexo, antice postice- 

 que subangustato, lateribus rotundatis, rugose punctulato, linea tenui dorsali Iaevi, macula magna dor- 

 Bali testacea, elytris punctulatis, testaceis macula magna communi scutellari, fascia pone medium, 

 suturaque late nigro-piceis, antennis pedibusque llavis. Long. -08 — '09. 



