‘ 
486 MODERN CLASSIFICATION OF INSECTS. 
senting the thoracic spiracles, and 0 the orifices for the emission of 
the volatile fluid, which produces the scent for which these insects are 
so well known: fig. 8. the fore tarsus and part of the tibia (slightly 
emarginate) of Pentatoma. 
These insects are very varied in their colours, and amongst the 
exotic species are to be found many which equal the most splendid of 
the Coleoptera. They are found upon trees and plants, upon the 
juices of which they subsist, introducing their rostrum into the leaves. 
They will, however, attack other insects when opportunities offer, 
Latreille stating that several are occasionally to be seen surrounding 
and sucking a caterpillar; and Kuhn (in Der Naturforscher, st. 6., 
quoted by Fallen, Hemipt. Suec. p. 142.) states that six or eight spe- 
cimens of Pentatoma bidens, shut up in a room swarming with the 
bed-bug for several weeks, completely extirpated the latter. 
The eggs of these insects are varied in form, but generally of an oval 
shape, attached by one end to the leaves by a glutinous secretion, the 
other end being furnished with a cap* (De Geer, tom. iii. t. 13. f. 
19—22., and my fig. 122. 9.), which the insect detaches on bursting 
forth: the young larve are of a rounded or oval form, with thick 
antenne, a broad head, and the abdomen short (/fig.122. 10., and De 
Geer, Mém. tom. iii. t. 14. fig. 1. 10. 16.). De Geer (tom. iii. p. 262.) 
has made an interesting observation relative to the care with which the 
females ofa species of this family ( Acanthosoma grisea), found on the 
birch, defend their young. In the month of July he observed many 
females accompanied by their respective broods, each consisting of from 
twenty to forty young, which they attended with as much care as a hen 
does her brood of chickens. £%g.122. 11. represents the pupa of Penta- 
toma rufipes, which, although much more nearly resembling the imago, 
still differs from it in possessing only four joints to the antenne, two 
joints to the tarsi (fig. 122. 12.), and wanting ocelli; the scales of the 
fore wings are attached to the scutellum, and it will be seen that the ru- 
dimental hind wings only appear at the inner margin of the fore wings : 
each of the three middle segments of the abdomen are furnished with 
a pair of tubercles, having the appearance of spiracles; they have 
* Kirby and Spence (Jntrod. vol. ili. p. 104. and pl. 20. f. 15.) describe the egg 
of a Pentatoma furnished, not only with a convex lid, but with a lever of a horny tex- 
ture, and in the form of a cross-bow, for opening it, the handle being fixed to the 
lower part of the egg by a membrane, and the bow-part to the lid. See also Vallot 
on the eggs of this genus, in Bull. Sez, Nat. de Ferussac, Sept. 1830. 
