HYMENOPTERA. 137 
small, petiolate, and receiving the two recurrent nervures, a charac- 
ter which approximates the subgenus to Nysson(1). 
7. The last division of the Fossores, that of the CraBRoniTEs, 
only differs from the preceding one, inasmuch as these Insects, 
which usually have a very large head, almost square, when viewed 
from above, and their antenne frequently largest at the extremity or 
clavate, have an abdomen either oval or elliptical, and widest in the 
middle, or narrowed at base into an clongated pedicle, and as if ter- 
minated by a club. 
In some, the antenne are inserted below the middle of the ante- 
rior face of the head; the clypeus is short and wide.. 
Sometimes the eyes are emarginated. 
Trypoxyton, Lat. Fab.—Apius, Jur.— Sphez, Lin. 
Where the mandibles are arcuated and dentated. The superior 
wings have but two closed cubital cells, each receiving a recurrent 
nervure, the second cell is small and less distinctly marked, as well 
as a third, that which is incomplete and almost reachés the tip of 
the wing. The abdomen is narrowed at base into a long pedicle. 
T. figulus; Sphex figulus, L.; Jur., Hymenop., IX, 6—8. 
Black and glossy; the clypeus covered with a silvery, silken 
down. The female takes advantage of the holes excavated in 
old wood by other Insects, and deposits her eggs there, along 
with the little spiders destined to nourish her larve. This 
done, she closes the orifice with moist earth(2). 
Sometimes the eyes are entire. 
Here, the mandibles are narrow and merely dentated at the extre- 
mity, or terminate in a simple point, with a single tooth beneath or 
on the inner side. The antenne are approximated at base. 
Goryres, Lat.—.rpactus, Jur.—Mellinus, Oxybelus, Fab. 
Where there are three complete, sessile and almost equal cubital 
cells, of which the second receives the two recurrent nervures. The 
mandibles are moderate and unidentated on the inner side; the an- 
tennz are rather thickest near the extremity. The metathorax pre- 
(1) Lat., Ibid., 75, genus Tachybulus; and 387, genus Pison of Spinola, and 
not of Jurine. 
(2) Lat., Gen. Crust. et Insect., IV, 75. 
Vou. IV.—S 
