18 MISC. PUBLICATION 241, U. S. DEPT. OF AGRICULTURE 
The National collection contains 6 specimens from the District of. 
Columbia and points nearby in Maryland and Virginia, also 2 speci- 
mens without locality data. In addition to these specimens and the 
type, the writer has seen 3 specimens at the Bureau of Entomology 
and Plant Quarantine Laboratory, Melrose Highlands, Mass., which 
were taken at North Saugus, Mass., and one in the collection of the 
Academy of Sciences of Philadelphia, which is from Georgia. The 
host is unknown. 
(4) MICROCTONUS ELEODIS (Viereck), new combination 
Perilitus eleodis Viereck, U. S. Natl. Mus. Proc. 44: 561, 1913. 
Type.—In the United States National Museum. 
Similar to gastrophysae (Ashmead), but differing from the foregoing 
description of that species as follows: 
Face smooth or very weakly punctate; malar space shorter than basal width 
of mandible; cheeks and temples not so wide as eyes in female; antennae of 
female 22- to 23-segmented, rarely 21-segmented; those of male with 25 to 27 
segments; occipital carina a little more broadly interrupted medially; propodeum 
closely regulose, exareolate; metapleurum closely rugoluse punctate; radial cell 
not more than half as long as stigma; first abscissa of radius usually not oblique; 
nervellus not inclivous; petiole of first abdominal tergite smooth basally; suture 
between second and third tergites not distinct; ovipositor sheaths varying from 
as long as posterior femur to longer than posterior tibia. Color of thorax vary- 
ing from testaceous, with dorsum more or less piceous, to entirely piceous black; 
abdomen varying from mostly brownish yellow to piceous; wings clear hyaline; 
stigma and veins brown; no discolored spot beyond apex of first brachial cell. 
The collection in the National Museum contains nearly 200 speci- 
mens of this species, showing the following range in distribution: 
Kansas, Nebraska, Colorado, New Mexico, Idaho, and Washington. 
This material consists almost entirely of reared specimens, the hosts 
being adults of the following Tenebrionidae: Eleodes suturalis (Say), 
E. opaca (Say), EH. obsoleta (Say), E. hispilabris (Say), E. extricata 
(Say), E. tricostata (Say), EL. vandykei Blaisdell, Embaphion muri- 
catum Say, and EL. planum Horn. 
(5) MICROCTONUS NIGRITUS (Provancher), new combination 
Perilitus nigritus Provancher, Additions et Corrections au Volume II de la 
Faune Entomologique du Canada, traitant des Hyménoptéres, 1888, p. 379. 
Type.—tIn the Provincial Museum, Quebec, Canada. 
Agrees very closely with eleodis (Viereck), but the definitely longer 
radial cell and very weakly curved second abscissa of radius will 
distinguish it from that species. Instead of being 0.22 inch in 
length, as stated by Provancher, the type is about 2.2 mm long. 
Known only from the type, which is from St. Gertrude, Quebec, 
and a single specimen in the United States National Museum, from 
Agricultural College, Mich. 
(6) MICROCTONUS EPITRICIS (Viereck), new combination 
Perilitis epitricis Viereck, U. S. Natl. Mus. Proc. 42: 625, 1912. 
Type.—In the United States National Museum. 
The female agrees with the description of vittatae, except as follows: 
Temples and cheeks definitely narrower than eyes; face smooth and shining; 
antennae 20- or 2l-segmented; lateral ocelli on a line with posterior margins of 
eyes; middle lobe of mesoscutum smooth and polished, with only a few scattered 
hairs anteriorly; mesopleurum with a very short punctate or foveolate groove 
