214 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.57. 



below, broadest at about the middle, its length about two and one- 

 sixth times as great as greatest width; third cubital one-fifth wider 

 apically; the second recurrent received one-half the length of the 

 second intercubitus from the apex of the cell; sheath straight above, 

 rounded apically, tapering to a broader base. Black; labrmn, angles 

 of the pronotum, tegulae, whitish; abdomen beyond the basal plates 

 rufous; sheath black; legs rufo-ferruginous; the bases of all the tibiae, 

 and the four anterior basitarsis whitish; apices, hind femora, apical 

 tvro-thirds of hind tibiae, and all of the hind tarsi black; wmgs hya- 

 line, iridescent, venation brown. 



Male. — ^Length 5 mm. The structural characters of the head 

 agree very well with those of the female; third antennal joint is 

 distmctly shorter than the fourth; stigma as in the female; thii'd 

 cubital cell but little longer than its apical width; hypopygidium 

 sub truncate apically, the sides oblique; procentia projecting by 

 nearly its apical width, truncate. Black; labrum, angles of the 

 pronotum, and tegulae whitish; legs rufo-ferruginous; apices of all 

 the tibiae whitish; the extreme apex of the posterior femora, apical 

 tv.o-thu'ds of the posterior tibiae, and all of the posterior tarsi, 

 blackish; wings hyaline, venation brov\^n. 



Type locality. — ^^^ebb Pond, Maine. Described from eleven females 

 (one, ty|3e) and two males (one, allotype) reared from larvae collected 

 September 5, 1894, feeding on Alder. Material collected and reared 

 by H. G. Dyar and recorded under his No. 4Q. 



Type.— Csit. No. 21794, U.S.N.M. 



PTERONIDEA MENDICANA, new species. 



This species is closely allied to mendicus, hut is readily separated 

 by the large size and the different conformation of the head. 



Female. — ^Length 6 mm.; length of the antennae 4.5 mm.; robust. 

 Clypeus deeply, subsquarely emarginate, the width of the emargi- 

 nation much less than the lobes; lobes broadly rounded; supraclypeal 

 foveae punctiform, not confluent with the antennal foveae; supra- 

 clypeal area convex, broadly triangular in outline; middle fovea 

 elongate, deeper below, and givmg the appearance of being 

 circular; frontal crest indistinctly broken; ocellar basin poorly 

 defined, pentagonal in outline; postocellar area not arched, sharply 

 defined on all sides, straight antcriorl}"; postocellar line subequal 

 with the ocellocular line; antennae slender, tapering, the thu'd and 

 fourth joints subequal; head and thorax shining; stigma broader at 

 base, sharply tapering to the apex, the greatest width two and one- 

 third times the length; third cubital distinctly longer than its apical 

 width; second recurrent one-half the length of the second intercu- 

 bitus from the end of the cell; sheath straight above, broad, obliquely 

 truncate apically, gradually tapering below. Yellowish-ferruginous; 



