450 REVISION OF THE ELATEU1 D.l. 



2. A. memnonius, atro-fuscus, fusco-pubescens, thorace non transycrso, antiee vix angustato 

 dense punctato, linea Icevi dorsali vix distincta postice impress;!, angulis posticis pan is non divergen- 

 tibus, elytris confertim punctatis, striis distincte punctatis, antennis pedibusque piceo-rufis. Long. 

 •63— -82. 



Mater nemnonius (err. typ.) Ilcrbst, Kafer, 10, 29, tab. 1G0, fig. 10: Say, Trans. Am. Phil. Soc. 

 6, 176. 



Pedetes (AsapJies) ruficomis Kirby, Fauna Bor. Am. 146. 



Maine, Ohio, Pennsylvania, Alabama. The thorax of the female is more convex than 

 the male, and more rounded on the sides. The interstices of the elytra are usually slightly 

 convex, but one individual from Mr. Guex has them entirely flat. The carina) of the pos- 

 terior angles of the thorax are parallel with the margin and very strongly marked. 



3. A. baridius, nigro-fuscus, fusco-pubescens, thorace subtransverso, antiee angustato, lateribus 

 ante medium valde rotundatis, dense punctato, linea dorsali postice subimprcssa, angulis posticis non 

 divaricatis, elytris striis punctatis, interstitiis subconvexis confertim punctatis, antennis pedibuscpie 

 rufo-piceis. Long. - 90. 



Elater baridius Say, Trans. Am. Phil. Soc. 6, 176. 

 Hemicrcpidius Thomasi Germ. Zeitschr. 1, 213. 



Maine to Georgia. I was at first inclined to believe this merely a variety of the pre- 

 ceding, but as the difference in the form of the thorax cannot be altogether sexual, they 

 must be considered as distinct: the carina of the posterior angles of the thorax, as in the 

 preceding, are very strong and parallel with the margin. 



4. A. morio, niger, nitidus, parce pubescens, thorace latitudine non longiore parce punctato, pos- 

 tice canaliculato, angulis posticis non divergentibus, carina divergente, elytris striis profundis punc- 

 tatis, interstitiis subconvexis, minus dense punctulatis. Long. *70. 



One female, Oregon, Col. M'Call: the sides of the thorax are broadly rounded before 

 the middle. This species has the robust form of A. memnonius, but the thorax is 

 quite finely and thinly punctured at the middle, and more coarsely and densely at the sides: 

 the carina) of the posterior angles of the thorax are not parallel with the sides. The stria) 

 of the elytra are more strongly punctured before the middle, and the outer stria) are deeper 

 than those towards the suture: the interstices are moderately convex, finely not densely 

 punctulatc; from each puncture proceeds a short blackish hair, forming an indistinct pu- 

 bescence. 



5. A. aereus, elongatus, nigro-piceus, renescens, cinereo-pubescens, frontc paulo concava, thorace 

 subtilius punctato, densius et subtilius versus latera, latitudine longiore, angulis posticis subdivari- 

 catis, elytris striis punctatis, interstitiis subconvexis, punctatis, pedibus runs vel piceis, antennis nigro- 

 piceis, articulo 3'° modice dilatato. Long. "43 — - 4f>. 



Atlious sereus Melsheiuier, Proc. Acad. Nat. Sc. 2, 156. ( 9 ) 

 Athous ocneolus Melsheiuier, Proc. Acad. Nat. Sc. 2, 156. ( | ) 



Middle and Southern States. The male resembles very much in appearance Corym- 

 bitcs apprcssifrons: the sides of the thorax are very slightly rounded, and the third joint 

 of the antenna), though narrower, is as long as the fourth. The female has the thorax nar- 

 rowed and rounded before the middle, and the third joint of the antenna) about two-thirds 



