226 INSECTA. 



C. annulata, Fab. Found in the nests of the Vespa nidulans 



of South America, and mistaken by Reaumur — Insect., VI, xx, 



2, and xxi, 3, 4 — for the female of that Wasp. It is black ; point 



of the abdomen elongated; a white dot at the extremity of the 



posterior thighs; tibite white, picked in with white *. 



There the abdomon seems as if applied to the posterior extremity 



of the metathorax, or as if sessile ; it is rounded or very obtuse at the 



end, and compressed laterally. The ovipositor curves over the 



back. The wings are doubled, and the superior ones present a radial 



cell. 



Leucospis, Fab. 

 L. dorsigera, Fa.h., the female; L. dispar, the male; Panz., 

 Faun. Insect. Germ., LVIII, 15, the male. Black; abdomen 

 almost twice the length of tlie thorax, with three yellow bands 

 and two little spots of the same colour. The female deposits her 

 eggs in the nest of the AbeiUes 3Ia^onnes of Reaumur. 



That of another species — L. gigas — lays in Wasps' nests f . 

 The others, in several of which tlie antennie consists of but from 

 five to nine joints, have the posterior thighs oblong, and their tibias 

 straight. 



Of those in wliich the antennae, always simple in both sexes, are 

 composed of from nine to twelve joints, we will first distinguish 

 EucHARis, Lat. Fab. — Chalsis, Jiir. 

 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 ;}:. 



Thoracanta, Lat. 



These Insects, collected in Brazil by M. de Saint-Hilaire, by the 

 prolongation of their scutelium, which covers the wings, represent 

 in Europe those Hemiptera called Scutellera by M. Delamarck. 



The other subgenera with antennie still consisting of at least nine 

 simple joints, but which are geniculate, and in Avhich the wings are 

 not covered by the scutelium, may be divided into those where these 

 antennae 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 



Agaon, Dalm. 



They are very remarkable for the magnitude and length of their 

 head, and for their antennae, of which the first joint is very large, and 



* See Lat., Geu. Crust, et Insect, IV, p. 25; Fab. Syst. Piez. ; Oliv., Encyc. 

 Method., article Chalcis. 



f See the same works and the Monograph of this genus by Kliig, in the Mem. 

 Nat. Cur. of Berlin. Swammerdani appears to have known one_of these species. 

 X Lat. Gener. Crust et Insect., IV, 20. 



