HYMENOPTERA. 221 
In those, the abdomen is connected with the thorax by the greater 
portion of its transversal diameter, is almost sessile, nearly cylindri- 
eal, and simply widened or thickened towards its posterior extre- 
mity. Such are the 
Pe.tastes, [ddiqg—Metorvius, Panz., 
Where there is a circular elevation under the antenne, and the 
lateral edges of the scutellum are turned up and sharp *. 
In the second and last division of those species in which the max- 
illary palpi are composed of five joints and the labials of four, we ob- 
serve a profoundly emarginated or alinost bifid hgula, and maxillary 
palpi, the joints of which differ but slightly, or change their figure 
very gradually. The ovipositor projects and is covered at base by a 
large lamina formed like a vomer. ‘The posterior thighs are thick. 
The head in several projects in the manner of a snout. 
Acanitvs, Lat., 
When the head presents no anterior projection in the form of a 
rostrum f. : 
Acatuis, Lat., 
Where it terminates inferiorly in that manner. These Insects ap- 
proach the following subgenera by their wings f. 
Our second division of the Ichneumons only differs from the first 
with respect to the number of joints in the palpi, inasmuch as there is 
one less in the labials, which present but three. As in most of the 
species of the following division, the second cubital cell is most fre- 
quently as large as the first, and nearly square. The ovipositor pro- 
jects. The point of the mandibles is emarginated or bifid. 
Some present a remarkable hiatus between the mandibles and the 
clypeus. The maxille are prolonged inferiorly beneath the mandi- 
bles. The second cubital cell is square and tolerably large. The 
ovipositor is long. They form the genus 
Bracon, Fab. Jur., 
From which we might separate, as was formerly done by me, under 
the generic denomination of Virion, those species in which the an- 
tenn are short and filiform; in which the maxille are proportionally 
longer, and with the labium form a sort of rostrum ; and where the 
maxillary palpi are hardly longer than the labials. 
The species with setaceous antenne, at least as long as the body, 
in which the maxillary palpi are much longer than the labials, and 
where the maxillz and labium form that sort of rostrum under the 
mandibles, would alone be Bracones §. 
The others present no hiatus between the mandibles and clypeus. 
* Ichneumon necatorius, Fab.; Panz.,Faun. Insect. Germ., XLVII, 21 ;—Ich. 
migratorius, Fab. ;— Ich. amictorius Panz., Ibid.,LXXXV, 14 ;—Ich. dissectorius 
Panz., Ibid., XCVIII, 14. See Encyc. Méthod., article Peltaste. 
+ Lat., Gen. Crust. et Insect., IV, 9; Encyc. Méthod., Hist. Nat. Insect., 
2. BYE 
{ Lat., Ibid., 9; Encye. Méthod., Ibid, 38. 
§ See Lat., Gen. Crust. et Insect,, IV, 9; and Encye. Méthod., Hist. Nat. In- 
Sect, 8, P. 30° 
