HEMIPTERA. 161 



The female of the P. grisea — Cimcx griscas^ L. — protects 

 and leads her young' ones just as a hen does her cl'.ickcns *. 



We liavR thought it requisite to establish a new g-eneric section, 

 Heterosgelis, for a Pentatoma peculiar to Cayenne, in which the 

 head is cylindrical and the anterior libise form a semi-Lval pallette. 



Sometimes the antennjc have bat four joints, and the body is gene- 

 rally oblong. 



Here the antennse are filiform or clavate. 



Certain species foreign to Europe approach the preceding in the 

 general form of their body, which is rather oVuid than oblong, and 

 are distinguished from all the following onrs, either because it is 

 much flattened, membranous, and with a strongly dilated, slashed 

 and angular margin, or because theii' thorax is prolonged posteriorly 

 in the manner of a truncated lobe, and their sternum is horned — 

 these latter form the subgenus 



Tesseratoma, 



Established by MM. Lepeletier and Serville — Encyc. Method. — 

 with the Edessa papilloma of F>.bricius, and his E. ame hysiina. 



Some other Edes^ae of the same naturalist — the obscura, mactans, 

 viduala — resembling ordinary Pentatomae, without any posterior 

 thoracic prolongation, but with quadriarticulated antennae, might also 

 form another subgenus — Dixidor. 



A species from Brazil, analogous by its flattened form to the 

 Aradus of that naturalist, in which the edges of the body are 

 dilated, slashed, and angular, and its anterior extremity forms a 

 sort of clypeus truncated before, cleft in the middle, unidentated 

 on each side behind, and concealing antennae, geniculate near 

 their middle, and seemingly formed of but three joints, because 

 the first is very short, is the type of the subgenus 



Phl.^a, Lepel. and Serv. f 



All the following Geocorisee are generally oblong, besides which 

 they present none of the other characters peculiar to the preceding 

 subgenera. 



Here the antennae are inserted near the lateral and superior bor- 

 ders of the head, above an imaginary line drawn from the middle of 

 the eyes to the origin of the labrum. The simple eyes are either ap- 

 proximated or separated by an interval about equal to that which is 

 between each of them and the neighbouring eye. 



Next come those in which the body is more or less oblong, without 

 being filiform or linear. 



CoREUs, Fab. 



Wliere the body is partly oval, the last joint of the antennae ovoid 

 or fusiform, frequently thicker than the preceding one, and usually 

 shorter, and of equal length at most, in the others. 



They could be separated into several sections, which might even 



* See Fabvicius, genera ut sup. 

 t Encyc. Method. 



