COLEOPTERA. 497 



t 



Rh^bus, Fisch. 



Is distinguished from Bruchus by the flexible elytra and bifid hooks 

 of the tarsi(l). The 



Xylophii.us, Bonnelli, 

 Is removed from it by the palpi, which are clavate(2). 



The others have no apparent labrum; the palpi are extremely 

 small, hardly perceptible to the naked eye, and conical; the anterior 

 prolongation of their head resembles a rostrum or proboscis. 



Sometimes the antennae are at once straight, inserted on the ros- 

 trum, and consist of nine or ten joints. 



Those, in which the three or four last joints are united into a club, 

 form the genus 



Attelabus, Lin., and more particularly of Fab. — BecmareSy 



Geoff. 



They attack the leaves or most tender parts of plants. Most of the 

 females roll up these leaves into a tube or cornet, in which they de- 

 posit their eggs, thus preparing a domicil for their young ones, which 

 also furnishes them with food. 



The proportions of the rostrum, the manner in which it termi- 

 nates, as well as the tibiae and form of the abdomen, have given rise 

 to the four following subgenera: Apoderus, Attelabus, Rhyn- 

 CHITES, and ApI0^f. The first is the most distinct. The head of 

 these Insects is narrowed posteriorly, or presents a sort of neck, and 

 is united to the thorax by a kind of rotula. Their snout is short, 

 thick, and widened at the end, a character common to Attelabus, 

 properly so called, but where the head, as in the two other subge- 

 nera, is recived into the thorax up to the eyes. Here the snout is 

 elongated into the form of a proboscis. In Rhynchites, it is some- 

 what widened at the end, and the abdomen is almost square. 



R. Bacchus. Herbst.; Oliv., Col. V, 81, ii, 27. Cupreous-red 

 and pubescent; antennae and extremity of the proboscis black. 



The larva of this species lives in the rolled leaves, of the 



the latter, so common in the vicinity of Paris on various species of Reseda, forms 

 the genus Urodon of Schoenherr. The antennae terminate in three thicker joints 

 forming a club. , 



(1) Rhxbus Gebleri, ¥'isch..,Entomog. Imp; Russ., II, 178, xlvii, 1. 



(2) The .Snfhiciis populneus, ocululus, pygntxus, of Gyllenh;il. 



Vol. III.— 3 N 



