12 MISC. PUBLICATION 241, U. S. DEPT. OF AGRICULTURE 
typical Perilitus in the somewhat longer scape and in having the 
recurrent vein entering the first cubital cell far from the intercubitus, 
but is not generically distinct. Ashmead and Szepligeti followed 
Foerster in the use of Dinocampus for Perilitus Nees. Both incor- 
rectly applied the name Perilitus to Microctonus Wesmael as this 
genus was limited by Foerster. Actually Perilitus and Microctonus 
do not represent distinct natural groups. The division, on the basis 
of the separation or confluence of the first cubital and first discoidal 
cells, is obviously an artificial one; but since the species arrange 
themselves so conveniently into two groups by this character, it has 
been considered advisable to recognize both names as valid. __ 
The following combination of characters distinguishes Perilitus 
from other euphorine genera: 
Head transverse, completely margined behind; antennae long and slender, not 
geniculate; notauli defined; tibial spurs short; two cubital cells; first cubital 
and first discoidal cells separated; radial cell ending much before apex of wing, 
not longer than stigma; first abscissa of radius distinct; medius straight, well 
defined throughout; recurrent vein entering first cubital cell, or interstitial; 
submediellan cell long, complete; first abdominal segment petiolate, broadening 
on posterior half; spiracles of first tergite well behind middle; ovipositor prom- 
inent, compressed. 
Insofar as their habits are known, the species of Perilitus appear to 
be parasitic in adults of certain Coleoptera. 
The genus is represented in the Nearctic fauna by two described 
species, which may be separated as below: 
Key to the Nearctic Species of Perilitus 
Scape more than twice as long as thick; pedicel definitely longer than thick; 
recurrent vein inserted in first cubital cell far from intercubitus; first cubital 
cell distinctly larger than first discoidal, the latter long-petiolate; lateral 
1OWES OM MESOSCUbUTN ALC oe ean ane nee eee pe (1) coccinellae (Schrank). 
Seape but little longer than thick; pedicel hardly as long as thick; recur- 
rent vein interstitial with first intercubitus, or nearly; first cubital cell 
not larger than first discoidal, the latter short-petiolate; mesonotal lobes 
Jae yp Setanta RA es SE RA a) SE AI Dk BS Oe (2) pyrz (Viereck). 
(1) PERILITUS COCCINELLAE (Schrank), new combination 
(Figs. 1, H,; 2, Cand M) 
Ichneumon coccinellae Schrank, Fauna Boica, v. 2, pt. 2, p. 310, 1802. 
Bracon terminatus Nees, Mag. Gesell. Naturf. Freunde Berlin 5: 26, 1811. 
Perilitus terminatus Nees, Hymenopterorum Jehneumonibus Affinium, Mono- 
oraphier. — anv. eps on leads 
Microctonus terminatus Wesmael, Monographie des Braconides de Belgique, p. 63, 
1835. 
Dinocampus terminatus Foerster, Verhandl. Naturh. Ver. Preuss. Rheinlande 
19 (N. F. 9): 252, 1862. 
Huphorus sculptus Cresson, Canad. Ent. 4: 227, 1872. 
Perilitus americanus Riley, U. 8S. Dept. Agr., Div. Ent., Insect Life 1: 338, 1889. 
Dinocampus coccinellae Cushman, Ent. Soc. Wash. Proc. 24: 242, 1922. 
The following description, together with the foregoimg generic 
characterization, will identify this species: 
Length about 3 to 3.5 mm; face pilose, much broader than long; temples 
narrow; malar space as long as basal width of mandible; antennae usually 21- 
to 23-segmented; scape more than twice as long as thick; pedicel longer than 
thick; all flagellar segments elongate, the basal segment at least four times as 
long as broad, the following gradually shorter; thorax stout, about as broad as 
head; notauli represented by broad rugulose lines; a large subquadrate rugulose 
area at posterior middle of mesoscutum; lateral lobes nearly bare; propodeum 
tugose, its dorsal face short, its posterior face long, abruptly declivous and 
