250 WILLIAM J. FOX. 



abdomen sparsely so. Head and thorax sparsely clothed with long, pale pubes- 

 cence. Wings subhyaline, iridescent, apical margins darker, nervures testaceous. 

 Length 6.5 — 7 mm. 



Two specimen.s; Camden County, N. J., Aug. 31, 1890. Maybe 

 tlie niale of either of the two following species. 



22. Tacliytes obductus u. sp. 



9 . — Anterior margin of clypeus subtruncate ; front and ocellar region strongly 

 impressed, especially the latter; third antennal joint in length about equal to 

 the fourth, if anything a little longer, joints 4 and 5 about equal ; space between 

 eyes at top a little greater than the length of antennal joints three and four 

 united ; vertex and dorsulum finely and closely punctured, the l_atter more dis- 

 tinctly so: depression on the dorsulum anteriorly, in the middle, not strong; 

 scutellum not impressed, metanotum very finely and closely punctured, finely 

 granulated laterally, depressed on each side and with a faint, though distinct, 

 medial impressed line ; tibige and tarsi rather strongly spinose. Abdomen very 

 finely and closely punctured above, beneath on segments 3 — 6 with large, scat- 

 tered punctures, black; mandibles in the middle ferruginous; tegulfp, nervures 

 and spines on the legs testaceous ; face, clypeus, cheeks, thorax and legs more or 

 less, the abdomen above, especially on apical margins of the segments with 

 bright silvery pile. Head, thorax and first abdominal segment clothed with 

 sparse, pale pubescence. Wings subhyaline, a darker cloud in the marginal cell. 

 Length 11 mm. 



Tennessee. 



23. Tacliytes niergus n. sp. 



J. — Anterior margin of clypeus armed laterally with a large prong; space 

 between eyes at the top less than the length of joints 2 and 3 of antennae; an- 

 tfunse long, slender; scape unusually long; third antennal joint distinctly lon- 

 ger than the fourth, which is a little longer than the fifth ; mandibles long and 

 slender; dorsulum finely and closely punctured; metanotum also finely punc- 

 tured, with a very strong medial sulcus, which is much widened on apical por- 

 tion. Legs rather strongly spinose ; pygidium triangular, the apex rather acute, 

 black ; base of mandibles yellowish, the remainder rufous; tegulse and nervures 

 testaceous; front, clypeus, cheeks, thorax rather densely, and abdomen more or 

 less, more obvious in certain lights, and the legs with silvery pile. Wings sub- 

 hyaline, the apical margins paler; pygidial area silvery. Length 9 mm. 



Camden County, N. J., July 6, 1890. 



UNIDENTIFIED. 

 Tachytes dives Lep. 



9 . — Head black, its anterior part furnished with golden hair. Autennte 

 black ; prothorax and raesothorax black, furnished with golden pile; metathorax 

 black, shining, its hair gray. Abdomen black, before the posterior border of the 

 segments having a band of glaucous; anus black. Legs ferruginous, the four 

 posterior having the coxje, trochanters and base of femora of a black color. 

 Wings black ; nervures, stigma, costa and tegulse of the same color. Length 7 

 lines (14 mm.). 



Carolina. Museum of M. Serville. 



