222 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



almost without sculpture; second tergite about twice as wide as its 

 median length, the basal portion with rather rough granulation, the 

 apical portion almost impunctate; the third and following segments 

 shining, almost impunctate. Black; clypeus, mandibles except 

 apices, scape and pedicel beneath and legs fulvous; trochanters 

 pallid; posterior tibiae and tarsi brownish; base of the posterior tibiae, 

 the four anterior tarsi whitish; tegulae white; wings hyaline, irides- 

 cent; venation dark brown. 



Falls Church, Virginia. Described from two males recorded under 

 Bureau of Entomology No. Hopk. U. S. 10165, which refers to a 

 note stating that this species is parasitic on the species of Eriocam- 

 2)oides which feeds on Quercus rubra. Material collected and reared 

 June 19, 1913, by WiUiam Middleton. 



Ti/^e.— Cat. No. 18520, U.S.N.M. 



Genus EXENTERUS Hartig. 



EXENTERUS DIPRIONI, new species. 



This species is closely related to Exenterus lophyri Viereck but the 

 propodeum and the first and second tergite are more rugose. 



Female. — Length, 9 mm. Face with distmct, close, almost con- 

 fluent punctures; frontal carina poorly defined; occiput with the 

 punctures distinct, close; posterior orbits with the punctures smaller, 

 similar to the occiput; third antennal joint but little shorter than the 

 fourth and fifth; pronotum, mesoscutum, mesepisternum with close, 

 distinct, rather small punctures, in the middle of the mesepisternum 

 and the mesoscutum the punctures become somewhat larger; scutel- 

 lum with fine, close punctures; lateral median area with distinct 

 rather large punctures; metanotum with a few scattered punctures; 

 propodeum with distinct rather fine punctures; the median basal 

 area is coarsely rugose; first tergite with two longitudinal median 

 carinae which converge posteriorly but do not unite, bending just 

 before the yellow band; sides of the first tergite with a sharply de- 

 fined carina which is arched inwardly at the basal third; surface of 

 the tergite is coarsely reticulate, with a granular or finely punctured 

 surface; second tergite finely punctured, its basal median area with 

 coarse reticulations; third and following tergites with uniform close, 

 well-defined punctures. Black; clypeus, labrum, mandibles except 

 piceous apices, palpi, front to the top of the eyes except two black 

 lines to the base of the antennae, posterior orbits to near the top 

 of the eyes (narrower dorsally), scape, first three joints of the flagel- 

 lum, the anterior margin of the pronotum, two lateral spots on the 

 pronotum, two spots anteriorly on the mesoscutum, tegulae, spot 

 anteriorly on the mesepisternum, scutellum, metanotum, two spots 

 on the propodeum and narrow uniform bands on all the tergites, 

 yellow; legs yellow; the apices of the posterior coxae, most of thepos- 



