46 MATERIALS TOWARDS A HISTORY 



*ASTYNOMUS. 



An uncharacterized genus of Dejean, including ^Edilis, but which I restrict to the 

 species here cited; assuming the remarkable enlargement at the extremity of the third 

 articulation of the antennae in the male as the generic characteristic. 



121. A. nodosus, Fabr. Syst. El. ii. 289. Oliv., pi. 14, fig. 103. Encyc, v. 291. 

 This rare species has been found in Pennsylvania and Maryland. 



AMNISCUS, Dejean. 



122. A. PERPLEXUS. 



Dull, obscure brown ; pronotum with two tubercles; elytra with an indistinct, submarginal costa, and rather 

 regular series of impressed punctures. 5s"' long; (elytra 4|,) 2| wide. 



A. perplexus, Dej. Cab. Le Conte. Front convex, medial line impressed, particularly between the antennae; 

 labrum fulvous, mandibles shining black; antennae obscurely annulate: prothorax with small, impressed punctures, 

 largest posteriorly, and wanting upon the obtuse lateral tubercle, pleura margined anteriorly and posteriorly with 

 large ones, of which there is but a single row posteriorly; a small, longitudinal tubercle along the dorsal line pos- 

 teriorly, and a small, circular, shining one each side of it anteriorly: scutel longitudinally impressed: elytra entire 

 at tip, an indistinct, cinereous spot behind the middle, and at the basal angle, and a row of black points along the 

 suture posteriorly: feet and under parts with numerous small spots: elytra cinereous, hairy, mottled with dark- 

 brown. 



123. A. COLLARIS. 



Dull reddish-brown, with darker spots; five tubercles arranged around the posterior margin of the prothorax. 

 4|'" long; (elytra 3|,) 2 wide. 



Front uniformly dull cinereous; medial line strongly impressed, eyes dark-brown, with a golden reflexion; 

 antennae and feet annulate: prothorax thickly punctured, a large tubercle in the middle posteriorly, and another 

 each side between it and the lateral tubercle ; elytra punctate, basal angles glabrous black, whence a dark-brown, 

 irregular band extends backwards to the middle, and then narrows towards the suture; one or two black spots 

 near the suture posteriorly; suture with a row of dark points; apex sub-entire: metasternum with yellowish hair, 

 indistinctly dotted with brown: ground-colour dull testaceous. 



124. A. ALBESCENS. 



Grayish-white, antenna; spotted and annulate with brown; elytra scabrous, with numerous elevations, posterior 

 third and epipleura brown. 10 j mm. long; (elytra 8) 4 wide. Boston Collection, No. 545? 



Ground-colour blackish-brown, covered with close, short hair: head concave between the antennae, medial line 

 wanting; eyes and mandibles black; mouth yellowish-brown; antennae with a dark-brown annulation at the apex 

 of every articulation, conlluent with a paler and more indistinct one at the base of each succeeding one; third and 

 fourth articulation thickly maculate with brown, five or six terminal articulations without spots: pronotum with 

 five tubercles around the posterior margin, central one in the dorsal line, conspicuous and polished, lateral ones 

 clothed like the general surface; an obtuse elevation each side anteriorly, medial line but slightly marked: elytra 

 with a sutural and three lateral eosUc, marked with elevated points; a small brown macula near the suture behind 

 the middle; suture with a row of black points; epipleura with a dark-brown spot extending to the middle of the 

 elytra, where it rises in a point, forming a triangle; apex dark-brown, slightly marked with cinereous, somewhat 

 truncate within; tarsi blackish-brown, extremity of the tibia; and an annulation near the base of the same colour: 

 under parts with a tinge of reddish, slightly clothed with hair; sternum more thickly clothed, and irrorate with 

 brown. 



Var. A. asperatus, Dej. Elytra, with the posterior black spot wanting, and having a short, curved ridge at 

 the base, extending from the scutel to the suture; scutel brown. 3.j lines long. 



