HEMIPTERA. 161 
The female of the P. grisea—Cimexr griscus, L.—protects 
and leads her young ones just as a hen does her chickens *. 
We have thought it requisite to establish a new generic section, 
Hereroscenis, for a Pentatoma peculiar to Cayenne, in which the 
head is cylindrical and the anterior tibize form a semi-cval pallette. 
Sometimes the antenne have but four joints, and the body is gene- 
rally oblong. 
Here the antenne are filiform or clavate. 
Certain species foreign to Europe approach the preceding in the 
general form of their body, which is rather ovoid than oblong, and 
are distinguished from all the following ones, either because it is 
much flattened, membranous, and with a strongly dilated, slashed 
and angular margin, or because their thorax is prolonged posteriorly 
in the manner of a truneated lobe, and their sternum is horned— 
these latter form the subgenus 
_ TESSERATOMA, 
Established by MM. Lepeletier and Serville—Encyc. Méthod.— 
with the Edessa papillosa of Fabricius, and his E. amethystina. 
Some other Edesse of the same naturalist—the obscura, mactans, 
viduala—resembling ordinary Pentatome, without any posterior 
thoracic prolongation, but with quadriarticulated antenne, might also 
form another subgenus—Drinivor. 
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 antericr extremity forms a 
sort of clypeus truncated before, cleft in the middle, unidentated 
on each side behind, and concealing antenne, geniculate near 
their middle, and seemingly formed of but three juints, because 
the first is very short, is the type of the subgenus 
Puta, Lepel. and Serv. ¢ 
All the following Geocorisze are generally oblong, besides which 
they present none of the other characters peculiar to the preceding 
subgenera. 
Here the antennz 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 crigin 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. 
Where the body is partly oval, the last joint of the antenne 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 Fabricius, genera ut sup. 
+ Encye. Méthod. 
