42 [Apkil, 1S44. 



truncate; almost invisibly longitudinally wrinkled; dorsum tri-sulcate, inter- 

 mediate groove entire, with the lateral ones curved, and abbreviated before the 

 middle; like the head black, opake: scutel piceous: elytra dark fuscous or 

 blackish, minutely longitudinally wrinkled : abdomen deep black, glossy : feet 

 testaceous. 



This species, or the preceding one, may prove to be the 0. exiguus 

 Erichson. 



4. 0. mcerens. Black ; base of the antenna;, palpi and feet, testaceous; elytra 

 dark reddish-brown-piceous. — 1| — 2 1. long. Pennsylvania. 



Elongate. Antennae longish ; second and third joints subequal in length, 

 joints t — 10 equal in thickness; fuscous, with three basal joints, dull testaceous : 

 head smaller than the thorax, pitchy-black, minutely and longitudinally rugose, 

 and as is usual, profoundly impressed between the eyes and grooved on the 

 vertex; mouth and palpi dull testaceous: thorax contracted behind, with the 

 base and posterior angles obtusely rounded ; sides subrectilinear from before the 

 middle, anteriorly strongly arcuated ; apex truncate, with the anterior angles 

 slightly rounded; dorsum tri-sulcate, intermediate groove entire, well impressed, 

 with the lateral grooves very slightly arcuated, well impressed; pitchy-black, 

 and minutely and longitudinally wrinkled; elytra longer than the thorax, and 

 wider than long, finely and longitudinally wrinkled ; dusky reddish-brown, 

 with the sides and apical edge blackish : abdomen deep black, glossy : feet 

 testaceous. 



This species presents many traits of resemblance with O. Pennsylvanicus, 

 Erichson, but in that species the dorsal grooves are almost obsolete or effaced, 

 whereas in mcerens they are very profound and obvious. 



PIE ST ID. E, Erich.. 



Progxatha, Latr. — Slagonum, Kirby. 



P. americana. Rufo-testaceous; thorax with four faintly impressed punctures, 

 two on each side of the middle. — 2A 1. long. Inhabits Pennsylvania. 



Depressed, rufo-testaceous. Antennae more than half the length of the body, 

 rufo-testaceous; first joint longer and thicker than any of the other joints, sub- 

 cylindric, and truncate at tip; second and third joints obconic, the former one- 

 third shorter than the latter; remaining joints cylindric; two first joints glab- 

 rous: head larger than the thorax, with numerous and very minute punctures; 

 front excaved; vertex depressed; each side between the antennce with a short 

 incurved, acute horn, which converge at their tips; glossy : mandibles exserted, 

 falcate, mutic, acute, and black at tip : thorax at apex wider than the elytra, 

 contracted posteriorly, with the sides slightly rounded, and finely marginated ; 

 base truncate, with the posterior angles almost square; apex truncate, with the 

 anterior angles rounded; punctured as the head ; four small, faintly impressed 

 puntcures, two on each side of the middle, placed quadrangularly ; a fine im- 

 pressed dorsal line, not extending beyond the middle : elytra longer than the 

 thorax, quadrate, with numerous fine longitudinal wrinkles; wings white: ab- 

 domen somewhat darker colored than the elytra, sparsely and coarsely punctured ; 

 penultimate segment as the two preceding ones together; pubescent : feet color 

 of the body. 



