BY THOMAS G. SLOANE. 375 



character. Dr. G. H. Horn, in his definition of the Bembidiini, 

 makes "the mai'gin interrupted posteriorly and with a distinct 

 internal plica "* an important feature of the tribe. 



Pyrrotachys constrictipes, n.sp. 



Elongate, parallel, depressed. Mandibles long, decussating ; 

 labrum deeply emarginate; antennas with all the joints pubescent; 

 prothorax transverse, narrowed to base; elytra pubescent, finely 

 striate. Ferruginous ; head reddish, eyes and adjacent parts 

 black; elytra more obscurely coloured than prothorax, fuscous 

 along suture and towards apex; legs testaceous; under parts of 

 head and prothorax reddish, of body fuscous; antennae testaceous 

 at base, infuscate towards apex. 



Head strongly bi-impressed; vertex convex, finely punctulate; 

 impressions curved, diverging anteriorly and posteriorly, extend- 

 ing to sides of head behind eyes ; front depressed between 

 impressions; spaces between impressions and eyes convex, pro- 

 jecting sharply at base beyond sides of head; eyes prominent. 

 Labrum lai'ge, deeply emarginate, a transverse linear impression 

 a little before base. Prothorax depressed, transverse, widest at 

 anterior marginal puncture, lightly narrowed to base, evidently 

 wider at apex than base ; sides very lightly rounded, shortly 

 sinuate before posterior angles: anterior margin truncate; anterior 

 angles obtuse; base truncate, a little oblique on each side behind 

 posterior angles ; these prominent, obtusely dentiform ; a short 

 depressed space along base, the impression defining this space 

 curved forward in middle; median line well marked, not reaching 

 either margin. Elytra narrow, a little wider than prothorax 

 (1-7x1 mm.), depressed, parallel on sides, truncate at base, widely 

 and evenly rounded (without sinuosities) at apex; whole upper 

 surface covered with a short pubescence ; striae very fine, not 

 perceptible after the fourth; marginal channel hardly impressed 

 along sides, marked and punctate near shoulders; interstices flat; 



Vide Trans. Am. Ent. Soc. 1S8!, ix. p. 1.S3. 



