12 DESCRIPTIONS OF NEW SPECIES. 



37. P. protensus. Elongatus, niger nitidus, thorace fere trapezoideo, 

 latitudine paulo longiore, postice angustato, lateribus late rotundatis, 

 fortiter marginatis, angulis posticis obtusis et rotundatis baud carinatis, 

 linea dorsali tenui, impressionibus transversis profundis, basi utrinque 

 late foveato et parce punctulato, elytris striis valde profundis, intersti- 

 tiis angustis convexis, stria 2nda postice bipunctata, humeris haud den- 

 tatis. Long. '68. 



Pennsylvania ; Mr. Ulke. Belongs to the same group with P. 

 stygicus, coradnus, &c., but differs by the hind angles of the thorax 

 not being carinated ; the basal impressions are consequently single 

 as in P. moestus, which, however, is a broader insect with less deep 

 elytral striae, and four dorsal punctures. 



I>K VEJLl S Bos. 



38. D. turbulentus. Elongatus, niger opacus, thorace latitudine 

 breviore, lateribus postice fere parallelis, antice rotundatis, margine late 

 sensim reflexo, basi medio late emarginato, utrinque oblique impresso, 

 elytris thorace parum latioribus, interstitiis convexis, 7nao ultra trientem 

 carinato. Long. '85 1-0. 



Missouri ; Prof. Agassiz. Larger than D. reflexus, with the 

 sides of the thorax quite as much reflexed, but very different by 

 the body being entirely without lustre. 



ANOMOGLOSSUS CHAUD. 



39. A. amoeims. 



Baron Chaudoir has retained this species in Chiasmus, but it 

 seems to me more naturally placed in the present genus. The 

 mentum tooth is not absolutely wanting as in the other two spe- 

 cies, but is very small, and not prominent and emarginate as in 

 the other species of Chlaenius ; the labrum is quite distinctly 

 emarginate, though less so than in A. emarginatus. 



CHLAENIUS BON. 



40. C. sparsus. Supra nigro-cyaneus, griseo-pubescens, capite tho- 

 raceque viridi-tinctis, occipite frontisque lateribus punctatis ; thorace 

 subquadrato, latitudine vix breviore, lateribus late rotundatis, angulis 

 anticis deflexis, posticis subrectis, parce grosse punctato, basi utrinque 

 vage impresso, linea dorsali tenui, elytris ovalibus thorace latioribus, 

 striis tenuibus punctulatis, interstitiis parce punctulatis ; subtus fusco- 

 niger, antennis pedibusque ferrugineis, genubus tarsisque infuscatis. 

 Long. -53 -58. 



