162 INSECTA. 



be considered as subgenera, according to the relative proportions and 

 forms of the joints of the aritennse*. 



C. marginatus ; Cimex 'marginatus,'L,', Wolf, Cimic, I, iii. 

 20. Length six lines, and of a cinnamon-red ; second and third 

 joint of the antennae russet, the two others blackish ; the two 

 first longest of ail ; a small tooth at the internal base of the first; 

 posterior sides of the thorax raised and rounded ; abdomen di- 

 lated and turned up on the sides, with the middle of its superior 

 surface red. On plants it diffuses a strong odour which resem- 

 bles that of an apple. 

 The antennee of the other Geocorisse of the same subdivision ter- 

 minate by an elongated, cylindrical, or filiform joint. They consti- 

 tute a great portion of the genus Lyg-eus of Fabricius, and comprise 

 besides, that which he calls Alydus. The posterior legs of the males 

 are most frequently remarkable for the thickness of the thighs, and 

 in a great number for the form of their tibiae, which are sometimes 

 compressed and have the edges dilated, as if membranous and winged, 

 or foliaceous, and sometimes curved. Most of them are foreign to 

 Europe. 



To these Lygsei must be referred those species in which the sim- 

 ple eyes are separated from each other by an interval about equal to 

 that which exists between each eye and its neighbour, and in which 

 the thorax is much wider posteriorly than before, or forms a triangle 

 with a truncated apex. The body is generally less narrow than in 

 the opposite division, or that which is composed of the Alydi. 



HoLHYMENiA, Lepel. and Serv. 

 Where the second and third joints of the antennae are shaped like 

 a palette f . 



Pachylis, Lepel. and Serv. 



Where the third only has that form \. 



Anisosceli, Lat. 

 Where the antennae are filiform and not dilated §. 



* GoNOCERUS, The last joint of the antennae shorter than the preceding one, 

 and ovoid or oval; the latter and the second compressed, angular or dilated; 

 the first, or at least the second, longest of all. The C. sidcicornis, iyisidiator, an- 

 tennator, of Fabricius. 



Syromastes. The last joint of the antennae shorter than the preceding one, 

 and bordering on an oval ; the latter, filiform and simple. The C. marginatus, scapha, 

 spihujer, paradoxus, quadratus. Fab., and his Li/gceus sancttts. 



CORKUS. The last joint of the antenna differing but little in length from the pre- 

 ceding one, and almost fusiform ; the latter not compressed. The C. derdutur, hirti- 

 cornis, clacicornis, acrydioides, capitatus, Fab. 



t Encyc. Method., Insect., X, p. 61. Add Lijgceus biclavatus, Fab. 



1 Encyc. Method., lb. p. 62. 



§ Some have the posterior tibiae edged with a membrane: the L.mmehr anaceus, 

 compressipes, phyllopus, (jonayra,foliaceus, dilafatus tragus, &c. Fab. 



The others are destitute of that membrane ; the L. vulgus, grossipes, tenehrosus, 

 fulvicornis, curvipes, profaniis, phasianus, bellicosus, &c. Fab, 



Some species, with smaller antennas, and of the length of the body, form the su'' • 

 genus Nematopus of my Fam. Nat. du R^g. Animal. 



