40 



U.S. NATIONAL MUSEUM BULLETIN 2 83 



Figure 49. — Stilobezzia venifica, new species (9 )• a, frontovertex; b, fermora -tibiae; c, 

 wing; d, abdominal terga I-IV; e, 9 genitalia; /, spermathecae. 



Legs (fig. 496): Dark brown; femora with broad pale bands at 

 midportions, especially on mid leg, and narrow subapical pale rings; 

 tibiae with narrow subbasal pale rings, and obscure pale bands midway 

 on fore and mid legs; tarsomeres I— III pale. Legs rather stout, with 

 rather stout extensor bristles on mid and hind tibiae; stout ventral 

 spines on I-III as: fore leg 1-3-1, 0-0-0, 0-0-2; mid leg 1-4-2, 0-0-2, 

 0-0-2; hind leg 1-0-1, 0-0-2, 0-0-2; basal spine on hind basitarsus 

 about as long as segment thickness. Hind leg with lengths of femur 

 to V as 103-102-50-24-10-8-17; TR 2.1; hind tibial comb with 7-10 

 spines (av. 8.1, n=8). 



Wing (fig. 49c) : Grayish brown with veins darker brown and 3 

 intense brown areas anteriorly, across Ri to r-m, at end of R 4+ 5, and 

 at distal margin of cell R 5 ; radius with 5 scattered setae proximally; a 

 hyaline dot on Ri at 1 RC and 2 at distal thickening and bend of vein 

 R 4+5 ; CR 0.79; r-m to stem M lengths as 13:9; IRC large; macrotrichia 

 present at wing margin between end of costa and tip of vein M 2 . 

 Halter dark brown. 



Abdomen (fig. 49d) : Intensely dark brown, concolorous with thorax; 

 tergum I with cluster of 20 hairs on each side; posterior terga lightly 

 setose in 1-2 irregular rows on each. Spermathecae (fig. 49/) sub- 

 spherical, slightly tapering to the short slender neck, measuring 

 0.091 mm by 0.074 mm and 0.074 mm by 0.067 mm. Genital scleroti- 

 zation as in figure 49e. 



