156 I'ROCEEDINGS OF THE NATIO NAJ. MU8EUM. vol.63. 



'^;,^,^^[^o^^^a^e~^,2^^d^^ antennal furrows corn- 



plate; ocellar basin' triangular in outline, well defined, the lower 

 wall distinct; postocellar furrow straight; postocellar area convex, 

 about two and one-quarter times as wide as long; postocellar line 

 subequal with the ocellocular line; antennae slightly tapering api- 

 cally, the fourth joint distinctly longer than the third; stigma nar- 

 row, subangulate at base, tapering to the transverse radius, then 

 ffentlv oblique: anal cell of the hind wings with a long petiole; sheath 

 broad, straight above, gradually rounding to base. Black; posterior 

 mar-in of the pronotum, tegulae, and legs, except the brownish 

 femora and coxae and the infuscate apical joints of the posterior 

 tarsi, yellowish; the narrow apical margins and apical tergites fer- 

 rucrinous; wings hyaline, venation, including costa and stigma, black. 

 Type-locality.-Chavter Oak, Pennsylvania, described from one 

 female recorded under Bureau of Entomology No. Hopk. V. b. lUb6 

 Material collected by T. E. Snyder and reared May 7, 1914, by Wil- 

 liam Middleton. The larvae of this species feed on Quercus alba, 

 and it may be that the larva recorded under the name alUcolUs from 

 Quercus alia should properly be referred to this species. There 

 are no specimens in the Dyar collection of alhicollis which were 

 reared from larvae on Quercus alba. All the reared specimens came 

 from larvae feeding on Quercus finetorki. 

 Type.--C'dt No. 19043, U.S.N.M. 



PERICLISTA XANTHOGNATHA. new ipecies. 



In the general shape of the sheath and the pale mandibles this 

 species resembles ocddentalis Rohwer, from which it may be sepa- 

 rated by the distinctly emarginate cylpeus. 



/^emaZe.~Length,6mm. Robust. Labrum long, obstusely rounded 

 apically; clypeus shining, flat, the apical margin distmctly arcu- 

 ately emarginate, the lobes broad, rounded; supraclypeal area trape- 

 zoidal in outline, gently convex; supreclypeal foveae deep, piincti- 

 form, not connected with the antennal foveae; middle fovea repre- 

 sented by a shallow depressed area; ocellar basin sharply dehned 

 above, open below; postocellar furrow straight; postocellar area 

 convex, a little more than twice as wide as long, the lateral margin 

 rounded; postocellar line distinctly longer than the ocellocular line; 

 head shining, almost unpunctate except the frontal area between the 

 ocelli and the base of the antennae; antennae filliform, fourth joint 

 very slightly longer than the fifth; thorax shining; stigma straight 

 below, sharply oblique beyond the transverse radius; anal cell in 

 the hind wings sessile; sheath straight above, the apex narrow, 

 truncate, and very slightly upturned, from this projecting apex 

 gradually rounded to base. Black; clypeus, labrum, spot on the 

 mandibles, posterior margin of the pronotum, tegulae, legs, abdomen 



