446 REVISION OF THE ELATERIIXE 



One specimen, California, collected by Mr. Child. This species with the following esta- 

 blishes a passage to C. rubidipennis and others above described: the sides of the elytra are 

 however less dilated, so as not to alter the regular outline of the anterior portion; the anten- 

 na are also more compressed, and the third joint is fully as large as the following ones: 

 the last joint is wanting, but is probably not constricted. 



30. C. fall ax, ater, cinereo-sericeus, thorace latitudine sublongiore, antrorsum angustato, late- 

 ribus rotundatis, angulis posticis brevibus divaricatis apice obtusiusculis, confertim punctata, postice 

 subcanaliculato, elytris piceo-testaceis tenuiter striatis, interstitiis confertissime subtiliter punctulatis 

 fasciis duabus subdcnudatis notatis, fortius marginatis, pone medium oblique attenuatis, pedibus tes- 

 taceis femoribus obscurioribus, antennis nigris, articulo 3'° sequente non breviore, parum dilatato. 

 Long. "42. 



Mater fallax Say, Trans. Am. Phil. Soc. 6, 170. 



One specimen, Lake Superior, Dr. Harris has found it in New Hampshire. This species 

 completes the connexion with the species in the first group of the genus: in addition to 

 the obliquely attenuated and broadly margined elytra, the third joint of the antenna? is 

 only half as wide as the fourth: the last joint is not constricted. The bands on the elytra 

 are produced by the hairs being placed in a different direction, so as not to reflect the light 

 when the other portions show a sericeous lustre. 



40. C. divaricatus, fusco-piceus, breviter griseo-pubesccns, fronte paulo concava, thorace pa- 

 rum convexo, latitudine sublongiore antrorsum paulo angustato, lateribus omnino rectis apice subito 

 inflexis, angulis posticis elongatis divaricatis, confertim sat grosse punctata, canaliculato, elytris pone 

 medium oblique attenuatis, plus minusve fusco-testaceis, striis punctatis vix impressis, interstitiis sub- 

 tilius punctatis, antennis articulo 3'° 4 10 asquali, ll mo vix constricto. Long. •37 — - 45. 



Georgia and Carolina, abundant. This species will be easily distinguished by the long 

 divergent posterior angles of the thorax, and the straight sides which are indexed suddenly 

 at the apex, so that the anterior angles become rounded: the apex is transversely impressed 

 and excavated each side as in a few other species. The elytra are usually brownish, but 

 are sometimes as dark as the thorax. 



40. C. appressus, latiusculus, niger, supra glaber, thorace latitudine breviore, antrorsum angus- 

 tato, lateribus late rotundatis, angulis posticis productis subdivergentibus, obsolete carinatis, apice 

 lateribusque postice latioribus Isete rufis, confertim subtiliter punctata, elytris postice suboblique atten- 

 uatis, fortius marginatis, lsete flavis, sutura antice latiore, macula oblonga humerali, lineaque pone 

 medium nigerrimis, striis vix punctatis, interstitiis planis punctulatis, tibiis basi testaceis, antennis 

 nigris, articulo 3'° 4 to sequali, ll" 10 vix constricto. Long. - 4. 



Mater appressus Randall, Lost. Journ. Nat. Hist. 2, 11. 



Corymbites mirificus Le Conte, Agass. Lake Sup. 228. 



One specimen, Lake Superior; Randall found it in Maine. By its shorter thorax and 

 broader form, this species is remarkably different from all the other species here described, 

 in which the third joint of the antennae is dilated; but by the more distinctly margined 

 elytra it shows an affinity to the two preceding species. The under surface is black, with 

 the exception of the indexed margin of the prothorax, which is red, with a lame discoidal 

 black spot; the black line of the elytra is connected with some indistinct black marks 

 about the middle, which in some specimens may form a transverse fascia. 



