A. A. GIRAULT. 23 



as in that genus, but intermediate in this respect between 

 the genus mentioned and Lathromeris Foerster ; fore wings 

 with moderately short marginal fringes and dense discal 

 ciliation which is arranged in distinct lines ; a short oblique 

 line of from four to six discal cilia leads back from the stig- 

 ma! vein as in Pentarthron Riley. Caudal wings normal, 

 with three longitudinal lines of discal cilia. Venation of the 

 fore wing distinct, the submarginal vein narrow, straight, the 

 marginal vein straight, shorter, the postmarginal vein absent, 

 the stigma] vein set at an angle of about 65 degrees to the 

 marginal, distinct, nearly sessile. Parapsidal furrows com- 

 plete. 



Tarsi 3-jointed, without claws apparently, the tibial spurs 

 single, weak, the anterior tarsi without antennal combs or 

 strigils, the anterior tibial spur weakest, straight. All tarsal 

 joints moderately short, subequal. Legs normal, the caudal 

 femora slightly thickened. 



Male. — The same ; abdomen not obliquely truncate ven- 

 trad but regularly rounded, somewhat longer ; antennal club 

 slightly less distinctly segmented, somewhat shorter and 

 more compact, less conical in general outline. 



A genus closely resembling Lathromeris Foerster as known 

 through L. cicadae Howard and L. fidiae (Ashmead), espe- 

 cially in the structure of the antennae but the antennal club 

 is shorter and distinctly 3-segmented, the fore wings are 

 shorter and more broadly rounded, the marginal vein is 

 shorter and the body is short and stout, the abdomen equal 

 to or barely longer than the thorax, not long and slender or 

 much longer than broad ; the oblique line of discal cilia lead- 

 ing back from the stigmal vein is present also, absent in 

 Lathromeris. The type species is described herewith. 



1. Uscaua seiiiifuinipeiiuis species nova. 



Normal position. 



Female. — Length, 0.80 mm. Moderately small, visible easily to the 

 naked eye but not casually even to the trained eye. General color tawny 

 yellow, the abdomen usually deep black, in some specimens varying to 

 dusky yellowish, the legs dusky excepting the pallid yellow knees, the 

 tarsi (excepting the very slightly dusky terminal joint) and the cephalic 



TRANS. AM. ENT. SOC, XXXVII. 



