PARASITIC WASPS OF BRACONID SUBFAMILY EUPHORINAE 11 
The original spelling, Ropalophorus, represents an obvious error 
in transcription. Blanchard’s emendation, however, is preoccupied 
in the Coleoptera by Rhopalophorus Serville, 1834. Accordingly, 
Eustalocerus Foerster, which was proposed to replace Westwood’s 
name, has been generally adopted. 
The genus is known only from the genotypic species, clavicornis 
(Wesm.), which is Kuropean. An examination of Wesmael’s type 
shows this species to agree with Perilitus in most important respects, 
but the structure of the antennae is strikingly different. These are 
very short, 10-segmented, geniculate at the pedicel, and clavate, with 
the scape and first segment of the flagellum much lengthened, flagellar 
segments 2 to 7 scarcely as long as thick, and the apical segment 
nearly as long as the three preceding segments combined. The 
face is apparently more densely hairy than in Perihtus and the pos- 
terior face of the propodeum is more strongly excavated medially. 
Eustalocerus clavicornis has been recorded by several Kuropean 
authors as a parasite of [ps typographus (I). 
Four North American species were described in this genus by Pro- 
vancher, but none of them belongs here. One, tauricornis, has been 
transferred to Meteorus (13, p. 27), while the three remaining species, 
none of them belonging in the Huphorinae, are discussed in this 
publication (p. 35). 
The Genus PERILITUS Nees 
Perilitus Nees, Nov. Act. Acad. Nat. Curios 9: 302, 1818; Haliday (Sectio A), 
Ent. Mag. 3: 34, 1835; Westwood, An Introduction to the Modern Classi- 
fication of Insects, v. 2, Gen. Syn., p. 61, 1840; Reinhard (Sectio 2), Berlin 
Ent. Ztschr. 6: 326, 1862; Marshall (in part), Ent. Soc. London Trans. 
1887: 71; Thomson (Sectio 1), Opuscula Entomologica, fasc. 16, p. 1740, 
1892. (Genotype, Bracon rutilis Nees.) 
Microctonus Wesmael (in part), Monographie des Braconides de Belgique, p. 54, 
1835. 
Dinocampus Foerster, Verhandl. Naturh. Ver. Preuss. Rheinlande 19 (N. F. 9): 
252, 1862; Ashmead, U. S. Natl. Mus. Proc. 23: 116, 1900; Szepligeti, 
Hymenoptera, Fam. Braconidae, in Wytsman, Genera Insectorum, fase. 
22, p. 174, 1904. (Genotype, Perilitus terminatus Nees.) 
In the course of the dismemberment of the group originally given 
this name, the true identity of the restricted genus Perilitus has 
become more or less obscured. Nees proposed the name for two 
species which he had previously described in Bracon, namely, Bracon 
rutilis and B. ictericus. He did not consider of generic importance 
the fact that the former had 2, and the latter 3, cubital cells. In 
1835 Haliday divided Perilitus into two groups, retaining Perilitus 
for those forms with 2 cubital cells and proposing Meteorus for those 
with 3. In the same year Wesmael likewise divided Perilitus into 
two groups distinguished by the number of cubital cells, but he 
applied the name Perilitus to those species having 3 cubital cells, 
and proposed Microctonus for those with only 2. In 1840 Westwood 
clarified this situation by designating Bracon rutilis Nees, a species 
that has only 2 cubital cells, as type of Perilitus, and Ichnewmon 
pendulator Latreille, having 3 cubital cells, as type of Meteorus, thus 
supporting Haliday’s division of the group. Foerster (1862) appar- 
ently overlooked these type designations, for he used Perilitus in 
the Wesmaelian sense. At the same time he divided the forms with 
2 cubital cells into several genera, restricting Microctonus Wesmael 
as shown below in the treatment of that genus, and proposing Dino- 
campus for Perilitus terminatus Nees. This species differs from 
