398 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



Wings hyaline, with indistinct, indefinite and scattered fumose 

 areas; scarcely a trace of faint basal brown. Costa yellow to the 

 stigma; stigma black. Antenodals of front wing 18-19, hind wing 

 12; postnodals of front wing 10; hind wing 11; triangle of front 

 wing free, of hind wing crossed on one side, free on the other; sub- 

 triangle of front wing crossed. 



Vulver lamina a short median thickening of the posterior edge of 

 the sternum, slightly folded into a trough; on either side of the 

 median line at the posterior end of the sternum is a small, rounded, 

 triangular projection about 0.25 mm. long and twice as wide at its 

 base, pale, slightly chitinized. These two projections very narrowly 

 continuous basally in the median line. 



Described from a recently killed specimen taken along the Wabash 

 River, just above the mouth of Six Mile Creek, Blufl^ton, August 1, 

 1909. The spots on segment 8 have faded to black in drying. This 

 type female is in the author's collection. 



