Packard.] 
22 
[May 5, 
P. Troilus (Mark) and P. Tnrnns (P. S. Sprague) ; also from P. 
Ajax and P. Marcellus, West Virginia (Norton), and Mr. Scudder 
states in a note describing a living specimen, “Body and legs 
deep salmon red ; antennal joints 1-2 black above, 3 red, 
remainder brownish fuscous ; below of a dusky tint like the body. 
One $ from P. Ajax and a $ from P. Marcellus is brownish on 
the sides of the thorax (not the propodeon) while a $ flom P. 
Ajax does not vary from the usual form and color of the species.” 
GeIstus Ichneumon’. 
Body long and narrow. Head not so broad as the body; in 
outline seen from above subtrapezoidal, the sides converging pos- 
teriorly, vertex rather high, convex ; clypeus flattened, not very 
distinct from the epicranium. Antennae filiform, often curled up, 
joints often nodose beneath in $ . Thorax oblong, scutellum sub- 
trapezoidal in form ; polished and often brightly colored. Pro- 
podeum squarish, moderately long, well rounded posteriorly, and 
with the usual longitudinal and transverse ridges. Wings with 
the second subcostal cell (areole) quite regularly pentagonal in 
form. Legs long and slender. Abdomen pedicellate, lanceolate 
oval, convex above; ovipositor often short, sometimes scarcely 
projecting beyond the tip of the abdomen, sometimes nearly as 
long as the hind tarsi. 
From Cryptus, with which the species of Ichneumon is liable 
to be confounded, the genus differs in the rather smaller eyes, the 
flat front, that of Cryptus being often knobbed, the rather small 
propodeum, the narrower pedicel (at tips) and the much smaller 
ovipositor, which in Cryptus is often as long as the body of the 
abdomen. Moreover the species of Ichneumon are usually the 
largest in the family except those of Anomalon and Trogon. 
The female differs from the male not only as do nearly all 
Hymenoptera in having one less segment, but the sculpturing 
on the propodeum is much less distinct, and the head is shorter, 
less oblong (in a transverse sense) and the antennal joints are 
shorter in the females than in the males. 
Ichneumon hunterae n. sp. 
One £, one ?. Allied to I. rufiventris Brulle. Head, tho- 
rax and basal ring (pedicel) of abdomen black, body of abdomen 
