98 INSECTA. 
dots on each ring of the abdomen; legs fulvous; ovipositor as 
long as the body. 
P. manifestator; Ichneumon manifestator, L.; Panz., Ibid., 
xix, 21. Black; scutellum of the same colour; legs fulvous. 
The 
P. ovivora, Bullet. Univers. des Sc., of the Baron Férussac 
destroys the eggs of Spiders(1). 
In others the abdomen almost borders on an oval, and has an elon- 
gated, slender and arcuated pedicle. They form the 
Cryptus, Fab. 
Some species are known in which the females are apterous, and 
which by reason of this character and the form of the thorax, that 
is divided into two parts or knots, might constitute a separate sub- 
genus. They are almost always found on the ground(2). 
There, the ovipositor of the females is concealed or but slightly 
prolonged beyond the anus. 
Sometimes the abdomen is compressed and falciform, or clavate 
and truncated. 
Opuion, Fab. 
Where the antenne are filiform or setaceous, and where the ab- 
domen is falciform and truncated at the extremity. The ovipositor 
is somewhat salient. The second cubital cell is very small or null. 
O. luteus; Ichneumon luteus, L.3; Scheeff., Icon. Insect., I, 10. 
Russet-yellow with green eyes. 
The female deposits her ova on the skin of certain caterpil- 
lars, particularly on that called in France the queue-fourchue— 
Bombyx vinula. They are attached to it by means of a long 
and slender pedicle. There the larve live and grow, with the 
posterior extremity of their body involved in the pellicle of the 
eggs from which they sprung, without preventing the Caterpil- 
lar from spinning its cocoon; but they finally kill it by consum- 
ing its internal substance, when they make their own cocoons, 
which are placed close together, and at length issue forth under 
the form of Ichneumons. 
(1) Fab., Syst. Piez.; and Encyc. Méthod., article Pimple. 
(2) Fab., Ibid. 
