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 ^^2+3 > 

 -^4+5 before the r-m crossvein elongate, about three times the 

 length of this crossvein ; basal deflection of M^-\-2 about equal 

 to r-m; petiole of cell M^ very short, not more than one-half 

 the length of the basal deflection of Mi+.-J basal deflection of 

 Cii^ 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, $ , Manila, Philippine Islands. 



Type in the collection of Mr. Banks. 



This curious fly difl^ers from 0. alpigena Mik in the small 

 size and especially in the wing-venation, the elongate basal sec- 

 tion of vein i?4-|-g, the short petiole of cell M^ and, especially, 

 the great recession of the basal deflection of Cmj, 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, 5 mm. ; wing, 4.5 mm. Rostrum dull yel- 

 low ; palpi brown. Antennae brownish yellow, the flagellar seg- 

 ments tight brown, the scapal segments more shiny. Head light 

 yellow. Thorax dull yellow, the prsescutal 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, 



