594 Coleopterological Notices^ VI, 



wanting, the marginal fringe very short dense and posteriorly de- 

 cumbent. Head small, scarcely more than three-fifths as wide as 

 the prothorax, smootlier and finely, sparsel}' punctate toward the 

 middle, the impressions large but feeble ; epistoma rather long, 

 pale, the labrum pale and strongly rounded ; eyes moderately 

 large, strongly convex ; antennae rather slender, feebl}^ serrate, 

 one-fourth longer than the prothorax, pale testaceous, darker 

 toward tip, the last three joints larger and blacker, the penulti- 

 mate joints transverse. Prothorax two-fifths wider than long, 

 widest and rather narrowly rounded just behind the middle, the 

 sides distinct^ convergent and straight or just visibly sinuate to 

 apex and base, the basal angles slightly obtuse but not in the 

 least rounded and apparently somewhat prominent ; apex arcuato- 

 truncate, much narrower than the base, the latter broadly arcu- 

 ate, obliquely sinuate lateralh^ ; disk densely' and finely punctato- 

 rugose, obsoletely and sparsely punctate, the submarginal exca- 

 vated line not extending to the apex. Elytra three-fifths longer 

 than wide, gradually wider to about apical third, where they are 

 nearly twice as wide as the prothorax, the apex thence obtusely' 

 ogival ; lateral edges narrowly- reflexed ; humeri exposed at base 

 and rounded ; disk obliquely and broadly impi'essed near the base, 

 finely and somewhat closely punctate. Under surface albido- 

 pubescent. Length 3.0 mm.; width 1.4 mm. 



Colorado and Arizona. The individual described above is a 

 female, and the fifth ventral is broadly rounded behind. The 

 male is undoubtedly narrower and less dilated behind. The apex 

 of the elytra and the lateral edges to a slight degree posteriorly 

 are rufous or rufescent. 



LEPTOVECTIRA n. gen. 



Although evidentl}- belonging to the well defined Allonyx 

 group of the tribe by reason of thoracic and ungual structure, the 

 single type of this genus ditfers greatly in general appearance 

 from any of the others in its Listrus-like body, with the elytral 

 epipleuraj narrow and gradually disappearing posteriorly in a fine 

 line on the external tlank very near the edge as in Das^'tes. The 

 inner claw has a ver^' large lamelliform appendage, which is ap- 

 parently closely affixed throughout its length, the outer being 

 simply obtusely swollen or subdentate internall}' at base. 



