264 CURCULIONIDES. 



mon 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. 



Antennae 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 Rhynchites 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. (^Attdahus') Syst. Eleut. 

 APION Herbst. 



1. A. ROSTRUM nob. Jour. Acad. Xat. Sci. 



This may very probably prove to be ^1. n!(jrum Ilerbst. 

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

 dance on the leaves of Robinia pseud-acacia. 

 [This is Apion Sayi Sch. — Lec] 



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

 and tarsi, 



Inliabits 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- 



