HYMENOPTERA. 113 
Teteas, Lat. 
Where the antenne are composed of twelve joints(1). 
ScEexion, Lat. 
Where those organs consist of but ten joints(2).° 
In the last subgenus, or 
PLATYGASTER, Lat. 
The radial cell disappears. The antenne of both sexes have but 
ten joints, of which the first and third are much elongated. The 
palpi are very short. The abdomen is flattened and in the form of 
a spatula. 
To this subgenus I refer the Pstle de Bosc of Jurine, a singu- 
lar Insect in which the first ring of the abdomen gives origin to 
a solid horn which curves forwards to above the head, and 
which, according to the observations of an able naturalist, M. 
Leclerc de Laval, is the sheath of the ovipositor. This species 
is very small and entirely black(3). 
In the sixth tribe, or the Curystipes, Lat., the inferior 
wings, as in the three preceding tribes, are not veined; but 
their ovipositor is formed by the last rings of the abdomen in 
the manner of the tubes of a spy-glass, and terminates ina 
little sting. “The abdomen, which in the females appears to 
consist of but three or four rings, is concave or flat beneath, 
and can be flexed on the pectus, in which state the Insect is 
globular. 
This tribe comprises the genus 
Curysis, Lin. 
The lustre and richness of the colours which decorate these Insects 
may challenge a comparison with those of the Humming-birds, and 
(1) Lat., Ibid., 32. 
(2) Lat., Ibid., 32. 
(3) Lat. Gener. Crust. et Insect. IV, 32. 
Vout. I1V.—P 
