of thk iNnr.ii si a n.-;. I |<i 



margined anteriorly, and not quadrate: its real affinities are with the two preceding Bpe- 

 cies, from which it differs by its more convex and coarsely punctured thorax. The elytra 

 arc somewhat obliquely narrowed posteriorly, and more strongly margined than in the 

 two preceding. The first joint of the tarsi is not longer than the second. 



49. ('. angularis, nigro-piceus, valde elongatus, tenuiter pubeacens, thorace latitndine P 

 Besqoi longiore, antice non angastato, parnm convexo, lateribua fere rectis, ; 1 1 » s » - . - Babmarginato, 

 angnlia anticia nifescentibus latius marginatis, angulia poaticia acutia divaric urina 



margini valde approximate, confertim panotato, elytria striia punctulatis, interatitiia rngose-pnnotn- 

 hit is, pedibus piceis, an tmnis nigria, baei piceia, snbaerratis, artioulo : '> ' r non breviore, auboylindrico. 

 Long. .35. 



One specimen, Oregon. Although evidently allied to the others in this division, the 

 third joint of the antenna' is considerably narrower than the following ones: the curious 

 reflexed margin of the anterior thoracic angles will easily distinguish this species: the 

 side- of the thorax are almost straight, slightlj rounded at the apex, and before the basal 

 angles: the first joint of the tarsi is slighth, longer than the second. 



\- \nn;s Kxrby, 



Although but one species of this genus is described by Kirby and another |,\ <,, rmar, I 

 find thai several of our Elaters possess characters which require them to be associated 

 with bis type. They seem to form a natural group approaching mosl nearlj to Coryra- 

 bites, and indeed differing from thai genus only in the structure of the tarsi. The - n ond 

 and third joints of the tarsi are dilated beneath into a short spongj lobe: thefirsl joint is as 

 long as the second and third together, and usually Bpongj at the tip: the fourth joint is 

 small and narrow, received upon the third, and is sometimes also spongj beneath: the fifth 

 joinl i- elongate with simple claw-. 



Our species may be grouped according to the presence or absence ol the basal fissures 

 and carina? of the thorax. The third joinl of the antenna' is more or less dilated and 

 usually but little smaller than the fourth. The first group osculates with Coryrabil 

 the second with Athous and Pedetes. 



A. Thorax fissuris basalibut distindis; angulis poatieu carinatia. 



1. A. hemipodus, crassus, nigro-pici 



10 vaMc conv< -vcrsim anbcoi tnodice ponctato, densitu ad later*, lateribua rotan- 



. angnlia poaticia parvia divergentibns, elytria ad median) latioribus, dein obliqai ;riis 



punctnlatis, interatitiia vage ponctatis, pi libo obaonre mfia. Long '61. 



/ ■-■_.. \ :. I. . I, 254: 'lie, . Am. 1'liil. Boo. 6, IT 1 ''. 



On<' specimen, Maryland, Prof, \dam-: a curious robusl • which exhibits a won- 

 derful resemblance to Corymbites crassuE above described. The transverse wrinkli -i 



the thorax are not mentioned by Say, and are possibl) not constant. The elytra I 

 four broad faint impressions, producing a Blighl elevation about the middle, neari r to the 



.-hie than to the -utnre: the third joint of the antenna' ap|>< n t.. be about I 



as the fourth, and hardly narrowi r. 



