OF Till; lAI'l'ED ST.Vl | ,7 . 



beneath, and all belong to Erichson's first division. Their appearance i- altogether that 

 of Dolopius, excepl thai the elytra arc Blightly cuneate, and the front is distinctly angulated: 

 the angles of the thorax arc not carinated, and the basal 6ssur< - are long. 



1. A. reoticollis, piceus, pubescens, thorace lateribus dilutioribua, antice paulo rotundatis, 

 minus dense punctato, angulia posticis si ;entibus, elytriB ti mtura infuacata, striia pro- 

 fundis pnnctatis, interstitiis parce pnnctatis, antennis pedibusquo rufo-testaci is. Long. •-'. 



Ilia Say, Journ. Acad. Nat. Sc. 8, L68: (inaeitu) Trans. Am. Phil. Soo. 6, 1- 1. 

 A milus Ericbson, Germ. Zeitschr. 8, 120. 



Middle States, not common. The differ* nee betw< i n tin- and the following, excepl in 

 colour, is not obvious: the sides of the thorax, however, appear to be 1< - suddenly rounded 

 in front, and the disc is more convex: the posterior angles appear more elongated and di- 



gent. 



2. A. test a ecus, ruf as, pul>escens, thorace minus dense pnncl ribua re< 

 antice breviter paulo rotundatis, angulis posticis non divergentibns, elytria striia profundis pnnctatis, 

 interstitiis parce pnnctatis. Long. I s . 



Melsheimer, Proc. Acad. 2, 219. 



Pennsylvania and Georgia. The sides of the thorax are entirely straight, except imme- 

 diately at the apex, where they arc rounded. 



Two specimens from the Southern States agree in form with this species, hut are of a 

 fuscous colour, with the antennae and feet testaceous; they can Bcarcely he separated. 



To this genus must belong Elater quietus Say, (Trans. Am. Phil. Soc. 6, 184:) a black 

 cies with yellow antennas and feet, and having the apex of the clypeus more obtuse 

 than in A. recticollis. It i< "2 line, long, and was found in Indiana. 



Here, probably, must he placed Elater inquinatus S "/. (ibid. I ?•">:) but the serration 

 of the ungues is not mentioned: vide remarks under l)ol<>|>ius pauper. 



\ \c hasti s Lee. 

 Frons convexa, antice Bubangulatim marginata: mandibular breves, basi triangulariter extus dila- 

 sii-ut in Dolopio:) labrnm antice rotundatnm: antenna? articnlo I mi I ■■ . | irw 

 articulis . coninnctis non longioribus : prosternnm lobatum, mncrom Bubinflexo, sntura 



laterali concava, antice excavata: mesostcmum non pr tminis intus valde 



dilatatia, margine autem posticovnon emarginato, dente forti interno instrc .ar- 



ticnlo L ma elongate, sequentibns duobua longi 

 jris. 



From Dicrepidius this genus differs by the second joint of the tarsi being simple; from 

 Dicrepidius, Elater, and in fact from all the genera of true Elatcridte, d< -< ribed in this 

 < --iv, it differs 1>\ the very great <\\\ itation of the coxal plates internal!) ; thi ir post* n< t 

 margin is somewhat oblique, though not Binuate as in Dicrepidius and Elater. The pos- 

 tcri< >r angles "I the thorax are acute, Btronslv carinate, and not diverging; there are do 

 basal Bssures. This genus Beems related to Physorhinus. 



1. A. digitatns, fnsco-] . helvo-pnl latitudii 



sum angnstftto, lateribns rcctis ant< me, limn rotund I 



