HYMENOPTERA. 107 
over the back. ‘The wings are doubled, and the superior ones pre- 
sent a radial cell. 
Levucosris, Fab. 
L. dorsigera, Fab., the female; Z. dispar, the male; Panz., 
Faun. Insect. Germ., LVIII, 15, the male. Bhack; abdomen 
almost twice the length of the thorax, with three yellow bands 
and two little spots of the same colour. The female deposits 
her eggs in the nest of the 4beilles Maconnes of Reaumur. 
That of another species—JZ. gigas—lays in Wasp’s nests(1). 
The others, in several of which the antenne consist of but from 
five to nine joints, have the posterior thighs oblong, and their tibiz 
straight. 
OF those in which the antennz, always simple in both sexes, are 
composed of from nine to twelve joints, we will first distinguish 
Evcnaris, Lat. Fab.—Chalcis, Jur. 
The only ones of this tribe in which those organs are straight or 
non-geniculate. The abdomen is pediculated. I could find no ves- 
tiges of palpi in several individuals submitted to my inspection(2). 
THORACANTA, Lat. 
These Insects, collected in Brazil by M. de Saint-Hilaire, by the 
prolongation of their scutellum, which covers the wings, represent 
in Europe those Hemiptera called Scutellera by M. Delamarck. 
The other subgenera with antennz still consisting of at least nine 
simple joints, but which are geniculate; and in which the wings are 
not covered by the scutellum, may be divided into those where these 
_antennz are inserted near the middle of the anterior face of the 
head, or considerably distant from the mouth, and into those where 
they are inserted close to it. 
In those where they are removed from it, some have almost 
an ovoidal abdomen, compressed on the sides, or higher than it is 
wide, and a usually salient and ascending ovipositor. Such are 
those which form the 
EE 
(1) See the same works and the Monograph of this genus by Kliig, in the 
Mem. Nat. Cur. of Berlin. Swammerdam appears to have known one of these 
species. 
(2) Lat., Gener. Crust. et Insect., IV, 20. 
