406 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 39. 



penultimate joint nearly two-thirds as long as the apical joint; tho- 

 rax black, shining with more or less distinct punctures and inconspic- 

 uous whitish pubescence, furrow between scutel and dorsulum tra- 

 versed longitudinally by two rather distinct raised lines, notauli 

 indistinct, almost wanting even anteriorly, propodeal spiracles per- 

 fectly round, third lateral area distinctly more than half as wide as 

 long, not longitudinally divided by a carina, legs mostly brownish, 

 the sutures and apical tarsal joints more or less testaceous; wings 

 infuscated, transparent, stigma and most veins blackish, gaster 

 mostly castaneous, base of petiole blackish, the latter with indistinct 

 dorsal carinae, thyridia on second segment indistinct and nearly cir- 

 cular, exserted portion of sheaths of the ovipositor as long as or a 

 little longer than the first segment. 



Type-locality. — Marietta, Ohio. 



Type.— Cat. No. 13346, U.S.N.M. 



Reared from the cocoon of a species of {Hylotoma) Arge on elm, 

 Hopk. U. S. 86356. In describmg this species numerous comparisons 

 were made with the genotype of JEnoplex, namely, Phygadeuon 

 {Mnoplex) hetulaecola Ashmead. 



Genus POLYTRIBAX Foerster. 



PHYGADEUON (POLYTRIBAX) PALLESCENS, new species. 



Male. — Length 10 mm. Shining, mostly pale fulvous, head and 

 thorax beneath, palpi, and coxae and trochanters of fore and mid 

 legs more or less yellowish; antennae 35-jointed, the joints of the 

 flagel subequal, the first flagellar joint the longest and brown, the 

 succeeding joints mostly or entirely black, scapes approximated 

 so as to be facetted on the opposite sides, proportion of scape and 

 pedicel normal; the basal area poorly separated from the areola by a 

 more or less developed welt, the basal areas mostly open at base, just 

 internal to the middle of the base of each first lateral area is a 

 tubercle of about the same size as the tubercles on the anterior edge 

 of the clypeus, tegulee yellowish, wings yellowish transparent, the 

 veins and stigma brownish excepting the costa, which is mostly 

 fulvous. 



Type-locality. — Castle Rock, Pennsylvania, June 6, 1909, H. S. 

 Harbeck, collector. 



Type.— Cat. No. 13347, U.S.N.M. 



A paratype from Montgomery County, Pennsylvania, May 30, 

 1897, C. W. Johnson collector, is but 7 mm. long and wants the welt 

 between the basal area and the areola. 



Since drawing up the above description I have received an addi- 

 tional male of this species reared from what appears to be a chrysalis 



