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UNITED STATES NATIONAL MUSEUM BULLETIN 224 



patch of long, bristly pile, the posterior portion of the 

 mesopleuron strongly protuberant and convex; hypo- 

 pleuron apilose but with a patch of exceptionally high, 

 conspicuous pubescence posteroventrally. Metanotum 

 exceptionally prominent, long, posterodorsally swollen, 

 with a dense patch of bristly pile laterally. Lateral 

 metasternurn with long, bristly pile throughout its 

 length. Ventral metasterniun chitinized, isolated, and 

 bearing similar bristly pile. Postmetacoxal area nar- 

 nowly chitinized, immediately behind the coxa, with a 

 short triangular plate, followed by a more extensive, 

 longer, wide membranous area. Tegula pubescent only. 

 Legs: The legs are rather elongate and slender 

 throughout, the middle and the hind femora distinctly 

 though slightly thickened subapically. The hind tibia 

 is a little longer than the femur and slender throughout, 

 slightly thickened at the apex. The legs are vitreous, 

 with short, stout, sharp, oblique bristles. In the type of 

 genus the following complement of bristles is present : 

 on the hind femur 6 ventrolateral, 1 dorsolateral sub- 

 apical ; its tibia has 4 slender, dorsomedial, bristly hairs, 

 5 short dorsal bristles, 5 anterior bristles, 4 ventrolateral 

 bristles. Middle femur with 3 posteroventral bristles in 

 the middle and with apical and subapical posterodorsal 

 bristles, likewise with similar corresponding anterior 

 bristles. This femur also has 1 anteroventral at the 

 outer fourth, another basally and 4 short, anteroventral 

 bristles. Middle tibia long and slender, with 7 anterior 

 bristles, 3 short, dorsal bristles at the base, 8 postero- 

 dorsal, 8 posterior, and 5 ventral bristles. Anterior 

 femur with 3 slender, posterodorsal bristles on the outer 

 half, besides 2 or 3 others placed a little lower down, and 

 a dorsolateral and dorsomedial bristle placed apically 

 and 2 ventral bristles in the middle. Anterior tibia with 



1 anterior bristle at the base, 2 at the apex, 5 anterodor- 

 sal, 6 posterodorsal, 7 posterior, and 5 ventral bristles, 

 besides 2 anteroventral distal bristles. Apex of anterior 

 tibia with a long, curved protuberance and spine ap- 

 pressed against a basitarsal flange. Tarsi end in small, 

 slender, sharp claws, well developed pulvilli, and a fine, 

 long, bristlelike empodium. 



Wings : The marginal cell is closed with a short stalk ; 

 3 submarginal cells are present, there being a rectan- 

 gular crossvein at the basal third of the second sub- 

 marginal cell. The second submarginal cell takes ori- 

 gin before the end of the discal cell and all the posterior 

 cells are widely open, except the fourth, which is nar- 

 rowly open or closed in the margin. End veins of the 

 discal cell of equal length; middle vein of the second 

 basal cell long, the anterior crossvein enters the discal 

 cell at the basal third. The anal cell is closed with a 

 long stalk; alula twice as wide as the costal cell, not 

 produced distally ; ambient vein complete. 



Abdomen : The abdomen is slightly wider at the end 

 of the third tergite than at the base and at this point 

 distinctly wider than the mesonotum. It is strongly 

 tapered beyond the third tergite ; 7 tergites present in 

 the female, the eighth and beyond incorporated in the 

 ovipositor. Pile of abdomen scanty, fine and suberect, 

 mostly minute. Sides of first tergite with a few deli- 

 cate, bristly hairs. Ovipositor elongate, strongly flat- 

 tened dorsoventrally, quite attenuate posteriorly and 

 triangular toward the base. The eighth tergite is 

 nearly as long as the previous two, the ninth and tenth 

 shorter but slender. 



Distribution : Neotropical : Pseudorus (Pandrettae 

 Carrera (1949) ; hermanni Carerra (1949) ; piceus 

 Walker (1851). 



