190 REVISION OF THE ELATERID.E 



Adelocera Lair. 



1. Antennas nrticulo 3 10 secundo longiore. 

 a. Sulci antennarum integri. 



1. A. irnpressicollis, fusco-brunnea, opaca, pilis depressis luteis minus dense vestita, thorace 

 oblongo, obsolete canaliculato, disco postice utrinque subfoveato, sat dense punctato, angulis posticis 

 planis subdivergentibus, elytris dense subseriatim punctatis, sulcis tarsalibus obsoletis. Long. -36 — *47. 



Mater irnpressicollis Say, Ann. Lye. 1, 260; Tr. Am. Phil. Soc. 6, 182. 

 Mater lepturus\\Sa.j, Trans. Am. Phil. Soc. 6, 182 (var. obscurior.) 

 Adelocera se7tilis Germ. Zeitschrift fur Entom. 2, 259. 



Middle, Western, and Southern States. Between the descriptions given by Say, I can 

 find no characters for considering his El. lepturm as distinct: the name itself was preoc- 

 cupied by Herbst. The antenna) of this species are longer than in the next, and the 

 joints are hardly transverse. 



2. A. pennata, nigra, opaca, thorace oblongo, canaliculato, postice utrinque foveato, punctato, 

 lateribus late, capiteque fulvo-squamosis, squamis angustis, elytris confertim punctatis, sulcis tarsorum 

 plus minusve distinctis. Long. - 33 — - 43. 



Germar, Zeitschr. 2, 258. 



Elater pennatus Fabr. Syst. El. 2, 239; Herbst, Kafer, 10, 52, tab. 162, fig. 9. 

 Mater discoideus Weber, Obs. Ent. 77; Say, Trans. Am. Phil. Soc. 6, 181. 

 Mater cruentus Oliv. Ent. 31, tab. 4, fig. 42. 



Middle and Southern States, not rare. The date of Weber's name is equal to that of 

 Fabricius', hut the latter is generally adopted. 



3. A. aurorata, nigra, opaca, squamis subaureis conspersa, thorace oblongo, confertim punctato, 

 profunde canaliculato, angulis posticis planis divergentibus, elytris confertim punctatis, parcius squa- 

 mosis, subtus cinereo-pubescens, tarsis rufis, sulcis tarsorum modice profundis. Long. '54. 



Mater auroratus Say, Trans. Am. Phil. Soc. 6, 181. 



The typical specimen from New Hampshire was kindly loaned me by Dr. Harris. This 

 species resembles, in form and general characters, the next, but is abundantly distinct. 



4. A. m arm or at a, nigra, subopaca, squamis luteis angustis irregulariter maculata, thorace ob- 

 longo, profunde canaliculato, confertim punctato, angulis posticis planis subdivergentibus, elytris 

 dense subseriatim punctatis, sulcis tarsorum anticorum profundis. Long. "6 — *7. 



Germ. Zeitschr. 2, 258. 



Elater marmoratus Fabr. Syst. El. 2, 227; Herbst, Kafer, 10, 124; Say, Tr. Am. Phil. Soc. 6, 180. 



Southern States, not rare. 



/'. Sulci antenna ru m postice abbreviati. 



5. A. obtecta, nigra, squamis pallidis ellipticis irregulariter vestita, thorace oblongo, punctato, 

 fortiter canaliculato, versus latera depresso, angulis posticis valde divergentibus, elytris disperse punc- 

 tatis, vix obsolctissime striatis, costa utrinque obsoleta usque ad medium extensa: sulcis tarsorum 

 nullis. Long. •(>. 



Mater obtectus Say, Trans. Am. Phil. Soc. 6, 181. 



Maine and Vermont. The antennas are moderately long, the second joint is much 

 smaller than the third, and the following air transverse, as is usual in this genus. The 

 pectoral grooves end suddenly near the anterior coxa 1 . 



