54 
I )escribed from many male and female specimens reared from cocoons 
of Meteorus. 
Habitat: -District of Columbia. 
U. S. National Museum type No. 3511. 
Bathythrix pimplae new species. 
Female. — Length (3.5 mm; expanse 11 mm. General color black; 
head and thorax opaque; abdomen shining; all legs, including coxa', 
rufous, with the exception of black band at the tip of hind femora and 
at tip of hind tibia'; hind tarsi blackish, except at base Of first joint; 
mandibles dark rufous: palpi nearly white; mesothorax very faintly 
and sparsely punctate; metascutum divided into six areolets; entire 
thorax with sparse line whitish pile; lower face with very close and 
dense whitish pile, particularly marked at edge of clypeus. 
Described from three female specimens, presumably parasitic upon 
Pimpla inquisitor. 
Habitat: District of Columbia. 
I'. S. National .Museum type No. 3512. 
Genus ADIASTOLA. 
Adiastola Foerster. Verh. d. Naturhist. Ver. <1. Preus. Rheinl. u, Westpb. 18(>8. p. ISO. 
Adiastola americana new species. 
Female. — Length 5 mm.; expanse 1) mm. General color black; all 
coxae and femora and joints 2 to 7 of abdomen rufous; hind tibia' and 
all tarsi black; front and middle tibia* rufous; teguhe whitish; mandi- 
bles and palpi black: petiole black, finely longitudinally aciculate; 
ovipositor sheaths nearly black; head and mesonotum very finely and 
very closely granulate, subopaque: mesoscutellum shining; areolets of 
metascutum marked, the hinder median one very concave, showing on 
profile view two sharp prominences; pleura shining, but very delicately 
shagreened. 
Male. — Resembles female except that abdomen is entirely black and 
that second abdominal segment, as well as petiole, is closely longitudi- 
nally aciculate, though not so coarsely as petiole. 
Described from two females and one male reared from cocoon masses 
of Orgyia leueostigma and presumably parasitic upon Pimpla inquisitor. 
Habitat: District of Columbia. 
U. S. National Museum type No. :3510. 
Genus PEZOMACHUS. 
Pezoinachus Gravenborst. Icbneunion. Europ;ea, II, 1829, p. 867. 
Pezomachus insolitus new species. 
Male. — Length 5 mm. ; expanse 10 mm. General color black ; antennae 
dusky; all legs, including coxjc, dark rufous; under side of abdomen, 
especially at base, somewhat rufous; clypeus rufous; mandibles rufous, 
black at tip; palpi dusky, nearly black; teguhe dark; fore wings yel- 
