HYMENOPTERA. 97 
illary palpi are much elongated, their last joints, in form and pro- 
portion, differing evidently from the preceding ones. The ovipo- 
sitor is not covered at base by a large lamina in the form of a 
vomer. ie 
Here, this ovipositor is extremely salient. 
Some species are distinguished from the others by their almost 
globular head, their mandibles terminated in an entire or but slightly 
emarginated point, and by the elongation of their metathorax. The 
second cubital cell is frequently wanting. Such are those which 
form the 
Srepuanus, Jur.—Pimpla, Bracon, Fab. 
Where the thorax is much thinned anteriorly, and on a level at 
its posterior extremity with the origin of the abdomen, so that this 
part of the body appears almost sessile and inserted in the posterior 
and superior extremity of the thorax as inthe Evaniz. The poste- 
rior thighs are inflated, and several little tubercles are observable 
on the vertex(1). 
Xorrwes, Lat.—Pimpla, Cryptus, Fab. 
Where the metathorax is convex and rounded at its descent, so 
that the abdomen is inserted, as usual, at its inferior extremity, and 
presents a very distinct pedicle(2). 
Of those species in which the head is transverse, and the mandi- 
bles are very distinctly bifid or well emarginated at the point, some, 
such as form the 
- 
Pimpta, Fab., 
Have a cylindrical and very briefly pediculated abdomen. We 
will cite the 
P. persuasoria; Ichneumon 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 
(1) Lat., Gener. Crust. et Insect., IX, 3; Bracon serrator, Fab.;—Pimpla coro- 
nator, Fab., and some other undescribed species from America. 
(2) Lat., Gener. Crust. et Insect., IX, 4. The Pimpla mediator, necator and 
~ meliorator, Fab., are probably Xorides; his Cryptus ruspator should apparently 
form a separate subgenus, allied to the preceding one. 
Vout. [LV.—N 
