ART. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 67 
PSILOCEPHALA FESTINA Coquillett. 
Plate 7, fig. 68; and plate 8, figs. 82 and 106. 
1893. Psilocephala festina CoquituETT, Can. Ent., vol. 25, p. 225. 
This is a rather slender species, 5.5 to 7 mm. in length. 
Type locality.—F lorida. 
Types.—In C. W. Johnson’s collection. 
Distribution.—The distribution according to three males and six 
females examined is: 
Florida: Daytona, April 8 (C. W. Johnson), [Cole]; Bradentown, 
March (M. C. Van Duzee), [Van Duzee]. 
Arizona: Safford, July 14 (EK. G. Holt), [Biol. Surv.]. 
Mexico: Dos Arroyos in Guerrero, Vera Cruz, September (H. H. 
Smith), [Amer. Mus.]. 
PSILOCEPHALA AURANTIACA Coguillett. 
Plate 6, fig. 52; plate 7, fig. 70; and plate 8, figs. 91 and 104. 
1904. Psilocephala aurantiaca CoquiLuErt, Proc. Wash. Ent. Soc., vol. 6, p. 177. 
Male—Length 7 mm. Head black, the proboscis, palpi, and 
first two antennal joints yellowish, apex of third antennal joint 
brown, the style short. Very few bristles on the short antennae, the 
third joint a little longer and broader than the first. (Fig. 91.) 
Pile of occiput and cheeks white, the bristles of the former black. 
Thorax, scutellum, pleura, and coxae black, the color more or less 
obscured by dense gray pollen. A few short reclinate yellowish 
hairs on the dorsum of thorax and scutellum, two apical converging 
bristles on the latter. There are faint suggestions of thoracic mark- 
ings, a median double stripe and two elongate side spots. Pleura 
almost bare of pile, there being only a few hairs on the metapleura. 
Halteres yellow. 
Abdomen almost an orange yellow on first four segments, darker 
on fourth, and above on first, the remaining segments black, including 
the genitalia. Posterior margins of first four segments narrowly white, 
with reclinate silver pile. All the rest of the abdominal pile black, 
reclinate, sparse on the first four and more dense on the apical segments; 
sides of first three segments silvery pollinose along posterior margins, 
also the narrow posterior rims of the fifth and sixth segments. 
Genitalia quite large, the hypandrium projecting some distance beyond 
the upper portion. (Fig. 104.) Legs blackish brown, the knees and 
extreme apices of hindfemora yellowish. Wings faintly infuscated, 
darker along some of the veins and outer part of cell first M-2; 
anal cell closed near the margin of the wing; cell M-3 wide open 
(fig. 70); stigma pale brown. 
Female.—Length 8 mm. Very near the male in general appear- 
ance. Frons rather narrow, not much wider than the ocellar tuber- 
60466—23—Proc.N.M.vol.62——18 
