264 CURCULIONIDES. 



inon indentation : with striae of transverse, large punctures : be- 

 neath blackish-blue. 



Length nearly one-tenth of an inch. 



This is the smallest North American species yet known. 



I have found it on the oak in June. 



Genus PTEROCOLUS Sch. 



Antennse 11-jointed, not geniculate; basal joint not much 

 elongated; eighth joint transverse linear; ninth and tenth trans- 

 verse subquadrate, dilated, and with the ultimate semioval one 

 remote, perfoliated, forming an oblong oval club ; rostrum di- 

 lated at tip : head rather long behind the eyes, neck not con- 

 tracted ; scutel transverse subquadrate : elytra somewhat abbre- 

 viated ; each rounded at tip, depressed above : podex and part of 

 the back, naked : feet robust : thighs unarmed, dilated ; tibiae un- 

 armed, ciliate densely on the exterior edge with very short spines, 

 and with small spines around the edge of the tip : body rounded. 



This genus differs from Rhyncliites by the rounded form of 

 the body; the shorter and depressed elytra, more divaricate [6] 

 at their tips; the rostrum is shorter and more contracted in the 

 middle, and the origin of the antennae is nearer the middle or 

 rather the base of the rostrum ; the tibiae are ciliated with short 

 spines, &c. 



P. ovatus Fabr. (Attelabus) Syst. Eleut. 



APION Herbst. 



1. A. rostrum nob. Jour. Acad. Nat. Sci. 



This may very probably prove to be A. nigrum Herbst. 

 Dr. J. F. Melsheimer informed me that it is found in abun- 

 dance on the leaves of Robinia pseud-acacia. 

 [This is Ajjion Sayi Sch.— Lec] 



2. A. segnipes. — Black; feet rufous, with black incisures 

 and tarsi. 



Inhabits Indiana. 



Body black, punctured with prostrate white hairs ; rostrum 

 rather long, and very slightly angulated, slightly tapering, punc- 

 tured at base : antennae with three or four basal joints, rufous : 

 thorax with dense large punctures : elytra with punctured pro- 

 foundly impressed striae; feet rufous; thighs at base, coxae, tro- 



