[21 2 



towards the base : front between the eyes very narrow ; elytra striated, at tip 



a little reflected .- thighs no\. obviously emarginated, nor toothed. 

 Length over one tenth of an inch. 

 This the Curculio quercus. Melsh. Catal. 

 Belongs to the subgenus Coptorus, Sch. 



2. Z. o/ierculatus, Nob. (Cryptorhynchus) Journ. Acad. Nat. Sc. 



3. Z. oculatus. Nob. (Cryptocephalus) Journ. Acad. Nat. Sc. 



CENTRlNUS,Schoenh. 



C. scutellum album. Punctured ; with scales ; scutel white. 

 Inhab. U. S. 



Curculio scutellum album. Knock in Melsh. Catal. 



Body black, densely punctured, & with short pale yellowish or whitish sca- 

 les : head minutely punctured : rostrum long, punctured, with a short, impres- 

 sed line at base : antennae piceous ; thorax with dense orbicular punctures cov- 

 ering the whole surface ; the tip of the posterior middle wite at the scutel t 

 scutel white : elytra with deeply impressed striae ; interstitial lines flat, broad, 

 densely punctured : beneath with whitish metallic scales, much more dense 

 than on the superior surface. 



Length three twentieths of an inch. 



Var. A. Over one fifth of an inch, the rostrum is more rectilinear towards the 

 tip. 



Var. C. Elytra with a slight piceous tinge. 



I have taken this insect in Pennsylvania, Indiana & Missouri, The Variety i« 

 from Arkansaw. 



CIONUS, Clairv. 



C. tcrophularia, Auct. My specimen is so much like the European individu- 

 als that it can hardly be considered to vary from them. 



RHYNCHOPHORUS, Herbst. 



1. R.praepotens, Thorax with three black vittae ; elytra each with two. 

 Inhab. Arkansaw. 



Body black, covered with dense, prostrate, cinereous hairs : rostrum shorte? 

 than the head & thorax : thorax with three black vittae, extended behind at 

 the scutel : elytra with double series of punctures ; a black vitta on the middle 

 of each, & a narrower subsutural one. 



Length more than three fifths of an inch. 



This is a fine insect. 



2. R, interstitialis. Thorax nearly as long as the elytra; interstitial lines with 

 a series of punctures. 



Inhab. U. S. 



Body black brown, with large punctures: rostrum linear, a little curved, pun- 

 ctures large at base, smaller at tip; base grooved above ; head punctured, 

 small .• antennae rufous : thorax almost as long as the elytra, with double seriea 

 of punctures ; interstitial lines not rounded and with a series of small punctures: 

 thighs unarmed ; tibiae with hair inside, and mucronate at tip. 



Length less than one fourth of an inch. 



3. R.perlinax, Thorax with three vittae ; elytra regularly striate. 

 Inhab. Florida. 



Calandra pertinax, Olivier. Ins., Schoenh. 



Body black, more or less covered with a dense, dull yellowish crust ; rot- 

 truTH arquated, compressed; with an elongated groove at base, above attenuatvii 



