458 REVISION OF THE ELATERIDjE 



Lake Superior, not rare. This species connects this with the last division of the genus: 

 the second and third joints of the antennas are hardly smaller than the fourth, and the 

 laminae of the posterior coxte are distinctly wider internally: the tooth is, however, not so 

 prominent as in the following species, and the clypeus is decidedly truncate at the tip, and 

 considerably elevated above the labrum: the lateral margin of the thorax is well marked 

 for its whole length, and is not deflexed so as to belong to the under surface, as in the pre- 

 ceding species. 



11. D. pauper, ater, pubescens, clypeo truncato, thorace latitudine vix longiore, lateribus pa- 

 rallelis, ad apicem rotundatis, apice et angulis posticis testaceis, confertim punctato, postice canalicu- 

 lato, elytris striis acutis punctulatis, intcrstitiis planis confertim rugose punctulatis, vitta rufo-picea 

 a hutnero ad apicem plus minusve distincta, antennis fuscis, basi pedibusque rufo-testaceis. Long. 

 •22— -29. 



Abundant throughout the Atlantic parts of North America. A specimen was sent me by 

 Dr. Harris as Elater inquinatus Say, which, however, being said (Trans. Am. Phil. Soc. 6, 

 175) to have the fourth tarsal joint lobed, and the thorax with an elongate basal fissure 

 each side, cannot belong to this genus. From the manner in which Say distributed types 

 of his species in Europe, I fear that he was not very careful in naming his duplicates, 

 probably trusting to his usually excellent descriptions, for the identification of those de- 

 scribed by him. I am inclined to believe that E. inquinatus Say must be referred to 

 Adrastus, and that the serration of the ungues was probably overlooked. 



Two specimens from Lake Superior are much larger, ("34 unc.) and have the striae of 

 the elytra less distinctly marked. They do not seem, however, to constitute a separate 

 species. 



12. D. subustus, fusco-niger, pubescens, thorace rufo-testaceo, rnargiuibus dilutioribus, dense 

 punctato, latitudine vix longiore, lateribus parallelis antice vix rotundatis, elytris rufo-testaceis, basi, 

 sutura margineque leviter infuscatis, striis punctatis intcrstitiis planis, confertim rugose punctatis, 

 antennis nigro-piceis, pedibus runs. Long. -27. 



Two specimens found at San Francisco, California. Somewhat more slender than D. 

 pauper, which, except in colour, it very much resembles: the lateral oblique lines of the 

 front are indistinctly connected anteriorly, and the vertex is not marked with the usual 

 oblong fovea. 



13. D. bigeminatus, subcylindricus, ater, pubescens, thorace latitudine fere sesqui longiore 

 lateribus parallelis, antice vix rotundatis, confertim punctato, elytris macula utrinque elongata pone 

 basin, alteraque pone medium rotundata, lrete rufo-testaceis, striis punctatis, intcrstitiis sat dense ru- 

 gose punctatis, pedibus testaceis, antennis vel fuscis vel testaceis. Long. '21. 



Elater biyeminatus Randall, Bost. Journ. Nat. Hist. 2, 37. 



Lake Superior, Massachusetts and Pennsylvania, rare. This species has the commis- 

 sure of the oblique frontal lines quite distinct, as in Adrastus, but the ungues are abso- 

 lutely without teeth: the vertex, as in the preceding species, is not foveate. 



Adrastus Esc//. 

 The species below mentioned have the third and fourth joints of the tarsi slightly lobed 



