244 
trochanters, annulus at base of hind tibiae, tibial spurs and annuli at base of hind 
tarsal joints, white; tip of hind femora, their tibiae and tarsi, except already noted, 
fuscous; flagelluin brown; base of second abdominal segment and apical margins of 
second and following segments narrowly red. 
Head transverse, a little wider than the thorax, the clypeus only separated at 
sides, truncate anteriorly ; antenna 21-jointed, the first and second flagellar joints 
about equal, the following gradually becoming shorter ; thorax subovoid, the sides of 
collar rugulose, the mesonotum as broad as long, with the parapsidal furrows indi- 
cated by depressions only anteriorly but not sharply defined ; mesopleura highly 
polished, separated from the mesopectus by a longitudinal crenate furrow and from 
the metapleura by a row of coarse punctures ; metanotum short, rugulose, rather 
abruptly truncate behind and distinctly areolated; wings hyaline, the stigma and 
venation, except a spot at base of stigma and the veins toward base of wings which 
are white, brownish-black; the radial cell terminates half way between the stigma 
and tip of wing, while the areolet is large, pentagonal in position, but with the outer 
nervure wanting ; abdomen a little longer than the head and thorax united, black, 
punctate, with the base of second segment and the apical margins of all the seg- 
ments, except the first, narrowly red; petiole, or first segment, 1| times as long as the 
second, shining, but with coarse although shallow punctures on the dilated portion, 
smoother toward base; body of abdomen sparsely pubescent, the venter ferruginous 
with two longitudinal folds. 
Habitat. — Utica, Miss. 
Described from 1 $ specimen, bred August 7, 1893, from the cocoon 
of Chrysopa oculata Say. 
Otacustes atriceps sp. n. 
Female. — Length 3 mm . ; ovipositor 0.8 mm. Brownish yellow; the head, antennas, 
from third joint, and ovipositor, black; clypeus, mandibles, and base of antenna 1 , fer- 
ruginous; hind tibia? outwardly toward tips and their tarsi, slightly obscured or 
dusky. 
Head transverse, a little wider than thorax, opaque, finely closely punctulate, the 
cheeks very narrow, polished, the face finely sericeous; clypeus transverse, entirely 
separated; antennae 25-jointed, the first three joints of flagellum nearly of an equal 
length, the following gradually shortening; thorax subovoid, about twice as long 
as wide, the prothorax at sides rugulose; mesonotum a little wider than long, 
punctulate, opaque, the parapsidal furrows only slightly indicated by depressions 
anteriorly; scutellum triangular, smooth, carinate at sides by the extension of the 
mesothoracic ridges; mesopleura smooth on disk and separated from the meso- 
sternum by an indistinct longitudinal depressed furrow below its middle, the portion 
below the furrows slightly aciculated; metathorax short, obliquely truncate poste- 
riorly and distinctly areolated, the surface of the areas more or less distinctly rugulose; 
wings hyaline, the tegulae, a spot at base of stigma and veins toward base of wings, 
whitish, the stigma and veins otherwise dark fuscous; the radial cell terminates 
half way between the stigma and tip of wing, the areolet being large and pentagonal, 
but with the outer nervure wanting; abdomen ovate, petiolate, very little longer 
than the head and thorax united, the petiole polished with some punctures toward 
the sides of the dilated apex, segments two and three finely punctate, the follow- 
ing smooth, impunctate. 
Habitat. — Utica, Miss. Described from 1 2 specimen, bred August 
17, 1893, from the cocoon of Chrysopa oculata Say. 
The family Chalcididse is without doubt the most extensive in the 
order Hymenoptera, and the species composing it are of incalculable 
value to the farmer and fruit-grower in destroying the more injurious 
