26 THE ENTOMOLOGIST. 
thorax, B the scutellum, C the metathorax, and D the abdomen. 
The neuration of the wings is of the utmost importance, and 
although the nomenclature varies it is well that great attention 
be given to the accompanying explanation, which is after 
Haliday :— 
AREOL&E. 
(Left fore wing.) 
. Costal. 
. First humeral. 
. Second humeral. 
. Third humeral. 
. Stigma. 
. Radial. 
. First cubital. 
oO fF OO eH 
~~ © 
8. Second cubital (areolet). 
9. Third cubital. 
10. Preediscoidal. 
11. Podiscoidal. 
12. Externomedial. 
13. Anal. 
(Left hind wing.) 
. Costal. 
. Prebrachial. 
. Pobrachial. 
Axillary. 
adial. 
. Cubital. 
. Discoidal. 
. Anal. 
oe Th OD 
io2) 
NERVI. 
(Right fore wing.) 
. Costal. 
. Subcostal. 
. Anterior, or preebrachial. 
. Posterior, or pobrachial. 
. Axillary. 
. Metacarpus. 
. Radius (8 abscisse) 
. Cubitus. 
rt. Anal. 
. Brachial recurrent. 
. Axillary recurrent. 
. Intercubital recurrent. 
. Interior discoidal recurrent. 
. Exterior discoidal recurrent. 
. Posterior discoidal recurrent. 
(Right hind wing.) 
. ‘Transverse anal. 
Of the legs—1, is the coxa; 2, the trochanter; 8, the femur 
4, the tibia (with apical spines); 5, the tarsus (of five joints); 
6, the claws. 
Figs. 3 show the different forms of abdomen :— 
3%, is sessile; 3°, almost sessile ; 3°, subsessile; 3%, subpetiolated ; 
3°, petiolated, a is the petiole, b the post-petiole. Fig. 4 shows 
the abdomen, with the aculeus or ovipositor hardly exserted in 
Ichneumon 4°; and very long in Rhyssa (Pimplide), 4°. 
The terebrant Hymenoptera, which are distinguished by 
having an ovipositor and no sting in the female, are primarily 
divided into two sections: one, in which the three great divisions 
of the body are less distinctly marked than in the higher 
