HYMENOPTERA. 219 
thighs are inflated, and several little tubercles are observable on the 
vertex *. 
XoriveEs, Lat.—Pirera, Cryprus, Fab., 
Where the methorax is convex and rounded at its descent, so that the 
abdomen is inserted, as usual, at its inferior extremity, and pr esents a 
very distinct pedicle ai 
Of those species in which the head is transverse, and the mandibles 
are very distinctly bifid or well emarginated at the point, some, such 
as form the 
Pimpeia, Fab., 
Have a cylindrical and very briefly pediculated abdomen. We will 
cite the ; 
P. persuasoria; Ichneuwmon persuasorius, L.; Panz., Faun. 
Insect. Germ., xix, 18. One of the largest species in Europe; 
black ; spots on the thorax and the scutellum white; two white 
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 {. 
In others, the abdomen almost borders on an oval, and has an elon- 
gated, slender, and arcuated pedicle. They form the 
Crrerus, 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 subgenus, 
They are almost always found on the ground §. 
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 antennz are filiform or setaceous, and where the abdo- 
men is falciform and truncated at the extremity. The ovipositor is 
somewhat salient. ‘The second cubical cell is very small or null. 
O. luteus ;. Ichneumon luteus, L.; 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— 
* Lat., Gener. Crust. et Insect., IX, 3; Bracon serrator, Fab. ;—Pimpla coro- 
nator, Fab., and some other undescribed species from America. 
+ Lat., Gener. Crust. et Insect., IX, 4. The Pimpla mediator, necator, and 
meliorator, Fab., are probably Xorides ; his Cryptus ruspator should apparently form 
a seperate subgenus, allied to the preceding one. 
+ Fab., Syst. Picz.; and Encyc, Méthod., article Pimple. 
§ Fab., Ibid. 
c Q 2 
