INSECUTOR INSCITI^ MENSTRUUS 7 
Thorax brown, the pruinosity lacking or destroyed. Halt- 
eres brown. Legs yellowish brown, the tarsi darker, wings 
whitish opalescent; veins dark brown; stigma narrow, quite 
indistinct. Venation : crossvein r weak, inserted on i?2+3 '> 
7?44-5 before the r-m crossvein elongate, about three times the 
length of this crossvein; basal deflection of M1+2 about equal 
to r-m; petiole of cell M^ very short, not more than one-half 
the length of the basal deflection of Mj+oJ basal deflection of 
Cu^ far before the fork of M, this distance equal to about one 
and one-half the length of the deflection. Anal angle of the 
wing prominent. 
Abdomen brown. Hypopygiun with the pleurites elongate, 
the appendages about half the length of the pleurites. 
Holotype, S , Manila, Philippine Islands. 
Type in the collection of Mr. Banks. 
This curious fly differs from O. alpigena Mik in the small 
size and especially in the wing-venation, the elongate basal sec- 
tion of vein R^-^-^, the short petiole of cell M^ and, especially, 
the great recession of the basal deflection of Cwj, in which 
character it is very like Orimarga. The milky white wings and 
the prominent anal angle are characters of Antocha. I believe 
Orimargula should be considered a valid genus. 
Tribe ERIOPTERINI 
Genus ERIOPTERA Meigen 
Erioptera (Erioptera) luzonica, new species. 
Coloration light yellow ; wing strongly suffused with yellow- 
ish, the veins darker. 
Female. — Length, .") mm. ; wing, 4.5 mm. Rostrum dull yel- 
low ; palpi brown. Antennae brownish yellow, the flagellar seg- 
ments light brown, the scapal segments more shiny. Head light 
yellow. Thorax dull yellow, the praescutal stripes rather in- 
distinct, the median stripe broad, dull orange, with a row of 
about eight stout bristles on either side. Pleura yellow with a 
sparse grayish white bloom. Halteres dull brownish yellow, 
brightest at the base, the knob dark brown. Legs dull yel- 
low, the tarsi darkened. Wings narrow for this genus of flies. 
