7* INSECTA. 



those in which the thorax is destitute of a horn, some are ap- 

 terous *. 

 The two last tribes of this family, and of the section of the Hete- 

 romera present certain common cliaracters, such as mandibles termi- 

 nating in a simple point; the palpi filiform, or merely slightly 

 thickened towards the extremity, but never ending in the securiform 

 club ; the abdomen soft ; the elytra flexible, and in most of them 

 epispastic; all the joints of the tarsi, some few excepted, entire, and 

 their hooks generally bifid. In a perfect state they are all herbivor- 

 ous, but several, in their first state, or that of larvse, are parasitical. 



The HoRiALES, composing the fifth tribe, differ from those which 

 constitute the sixth, or the CANXHARioiiE, in their hooks, which are 

 indented and accompanied (each) by a serrated appendage. These 

 Insects have filiform antennae, as long, at most, as the thorax, a 

 small labrum, strong and salient mandibles, filiform palpi, square 

 thorax, and very robust posterior legs, at least in one of the sexes. 



The metamorphoses of the Spotted Horia, an Insect inhabiting the 

 Antilles and South America, are described in the fourteenth volume 

 of the " Transactions of the Linnsean Society of London ;" its larva 

 destroys that of a species of Xylocopa — Teredo; X. morio,F3.h. — 

 which perforates the dead trunks of trees, and deposits its ova there 

 in the manner of other Xylocopse, The author of the Memoir 

 alluded to, suspects that the larva of this coleopterous Insect lives on 

 the provisions destined for the other, which consequently is starved 

 to death. 



This tribe is composed of the genus 



Horia, Fab. 

 These Insects inhabit the intra-tropical coimtries of South America 

 and of the East Indies. One of these species, from the latter, is re- 

 moved from all others by its head, which is narroAver tlian the tho- 

 rax, and by its posterior thighs which are strongly inflated, a cha- 

 racter which perhaps only belongs to one of the sexes. It is the 

 type of my genus Cissites f . 



The sixth and last tribe, that of the Canthakidl'E, is distinguished 

 from the preceding one by the hooks of the tarsi, which are deeply 

 cleft, and seem to be double. The head is usually large, wider, and 

 doubled posteriorly. The thorax is commonly narrowed behind, and 

 approaches the form of a truncated heart; in others it is almost 



* See Oliv., Col., and Encyc, Metliod ; SchcEnh., Ibid. The Odacantha tripus- 

 tulata of Fabriciiis is :i Notoxus. 



t See Lat., Geuer. Crust, et Insect., II, p. 211 ; Fabriciiis, Schcenher, Olivier, 

 and tlie Transactions of the Linnsean Society, already quoted. 



