64 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



Without examining the genitalia the species might be mistaken 

 for the more common einaris, but is separable by having much more 

 uniform ciliation of the hind tibiae, and especially by the presence 

 of numerous bristles in the male along the middle line of the venter, 

 which are absent in males of einaris. 



PHOROCERA INDIVISA, new species. 



Female only. — Front 0.35 of the head width (average of three 

 0.34, 0.34, 0.36), the pollen yellowish at vertex, whitish silvery the 

 rest of the way to the mouth; frontal bristles 6 to 8, the two upper- 

 most reclinate, the lowest attaining the level of the base of the third 

 joint, hardly meeting the strong bristles of the facial ridges; an- 

 tennae wholly black, slender, third joint almost reaching the vibris- 

 sae, second joint almost half the third; palpi yellow, the base slightly 

 inf uscated ; bucca one-sixth the eye height. Thorax as in claripennis, 

 but the scutellar hairs upright and stout, and the apical scutellars 

 erect and strongly decussate; dorsocentrals 4, sternopleurals 3. Ab- 

 domen almost wholly shining black ; a narrow undivided silvery band 

 at base of second, third, and fourth segments; no discals except on 

 fourth segment. Legs black, mid tibae with two or three bristles 

 on outer front side, hind tibiae with uneven bristles on outer side. 

 Wing subhyaline, fourth vein with square, angular bend and dis- 

 tinct fold beyond; fourth vein endihg farther before the apex than 

 usual ; costal spine distinct ; third vein at base with six to eight setules 

 reaching nearly to cross vein. 



Length 5 to 6 mm. 



Three females, College Station, Texas, September 20 and October 

 1, 1921 (H. J. Keinhard). 



Type.— Female, Cat. No. 25708, U.S.N.M. 



PHOROCERA COCCYX, new species. 



Male. — Front 0.29 of the head width, the sides with yellow pollen, 

 the parafacials also yellow, paler below; the frontal bristles con- 

 siderably overlapping the large bristles of the facial ridges. Anten- 

 nae black, third joint very large and wide, gradually wider toward 

 the tip, fully four times as long as the third ; arista long and slender, 

 the basal third slightly thickened; palpi yellow; proboscis small. 

 Thorax with yellowish gray pollen ; the dorsum with the usual dark 

 stripes; four dorsocentrals, three sternopleurals; pteropleura with 

 one small bristle. Abdomen slightly elongated, without discals ; the 

 hairs depressed on the second and third segments; the basal half or 

 more of each of the last three segments with white pollen, the apical 

 parts subshining, or in an oblique light, brown pollinose. Genital 

 segments blackish, the united inner forceps forming a slender curved 

 beak which is suddenly widened toward the base so that the basal 



