130 ^' Arsöne Girault: 



practically similar in the form of the antennae, but differs in the 

 absence of the ring-joint, in the short marginal cilia of the fore wing, 

 the more distinct and denser discal ciliation, the shorter marginal 

 and stigmal veins and the longer, more pointed abdomen. Norm.al 

 Position. 



Female: — Head normal, the ocelli normal, rather large, the 

 lateral ocelli rather close to the eye m.argin, the eyes large, the antennae 

 4-jointed — scape, pedicel and a short, rather stout, conic, 2-jointed 

 club, the scape slender, cylindrical, only moderate in lengtli, the pedicel 

 rounded oval, the club somewhat longer than the scape, broadest, its 

 proximal Joint much wider than long, a flat hemisphere, the distal 

 Joint a cone, four or more times longer than the proximal Joint, wrinkled 

 longitudinally and not terminating in a spine-like seta. Parapsidal 

 furrows complete, the mesoscutum longer than wide, its caudal margin 

 emarginate at the meson; mesophragma absent. Abdomen about 

 as long as the head and thorax combined, conic-ovate, pointed caudad, 

 the valves of the ovipositor projecting slightly beyond its tip. Legs 

 as in the type species of üscana, the strigils absent. 



Fore wings as in the type of üscana but the discal ciliation is 

 more distinct and arranged in more regulär line, the oblique line of 

 cilia leading back from the stigmal vein present, curved. The venation 

 differs from that of Üscana in the somewhat shorter stigmal vein 

 which is merely an ovate knob separated from the marginal vein by 

 a constriction (the very short, narrow neck) and appearing nearly as 

 if suspended from the edge of the marginal vein; the latter short, 

 about twice the length of the stigmal vein but not more than three 

 and a half times longer than broad; the uncus as in the other genus. 

 Posterior wings as in üscana as regards discal ciliation^) but broader, 

 shaped nearly as in üscanagrammatella but the marginal cilia are 

 shorter than with the type species of that genus, the longest (caudad) 

 not quite as long as the blade's greatest width, yet about twice the 

 length of the longest marginal cilia of the fore wing. 



Mandibles tridentate, the teeth sm.all, the two outer ones more 

 acute than the inner. 



Male: — The same; this sex differs from the other only in the 

 usual abdominal characters with the exception of coloration; the 

 abdomen is sm.aller, shorter and more blunt caudad, nearly rectangular, 

 the genitalia prominent but exserted. 



Type: Uscanoidea nigriveyitris species nova, described herewith. 



1. Uscanoidea nigriventris species nova. 



Normal position. 



F e m a 1 e: — Length, 0,60 mm, mean. Moderate in size for the 

 subfamily; visible to the naked eye. 



General color dull honey yellow (pale clay yellow) suffused with 

 dusky, the abdomen deep velvety black marked with transverse stripes 



^) But there is apparently a fourtli, less conspieuous line at the caudal edge 

 of the blade, in reality the bases of the marginal cilia. 



