124 U.S. NATIONAL MUSEUM BULLETIN 2 83 



as in subviridis, vestiture and extent of pale area on I similar; I with 

 5-7 hairs on each side. Spermatheca (fig. QOd) 1, elongate oval with 

 base tapering to the slender neck more gradually than in subviridis; 

 measuring 0.105 mm by 0.066 mm. Genital sclerotization as in figure 

 90c. 



Male.— Length of wing 1.39 (1.30-1.48, n=10) mm. 



Similar to the female, including features of abdominal terga (fig. 90h) 

 with the usual sexual differences. Genitalia (fig. 90e, /, i) as in sub- 

 viridis, but with basidorsal process of basistyle and aedeagal sclerites 

 definitely more slender; apex of paramere more strongly bent than in 

 subviridis. 



Distribution. — Malaya; Thailand. 



Types. — Holotype female, Kuala Lumpur, Selangor, Malaya, 

 8 Oct. 1958, R. Traub, light trap (USNM 69482). Allotype male, same 

 data except 8 August. Paratypes, 9 males, 11 females, all taken in 

 light traps. MALAYA: Selangor, same data as types, but dates also 

 July to Oct. 1958, Sept. 1959, March 1960, collectors also A. A. Hubert 

 and H. E. McClure, 9 males, 10 females. THAILAND: Nakhon 

 Prathom, 18 Dec. 1958, Manop R., 1 female. 



Discussion. — The slight but distinct and well-correlated structural 

 differences noted above lead us to believe that this is not a mere 

 teneral form of subviridis Macfie. Its restricted geographic distribu- 

 tion is also indicative. 



The following 3 species, congestiterga, crassistyla, and lasioterga, 

 new species, belong to a special section of the Subviridis Group in 

 which the anterior terga of the abdomen have strong modifications 

 of the pubescence. The male genitalia suggest that they are closely 

 related to subviridis Macfie despite such a special area of modified 

 pubescence. No females of these species are known, but they should 

 readily be distinguished by features of the leg coloration as well as 

 the special nature of the tergal spinosity. 



49. Stilobezzia (Stilobezzia) congestiterga Das Gupta and Wirth, new species 



Figure 91 



Female. — Unknown. 



Male. — As in subviridis Macfie, with the following distinctive 

 characters: Length of wing 1.3 mm. Thorax dark brown. Legs with 

 fore coxa, trochanter, and femur pale brown; mid femur and tibia 

 brown, concolorous with fore tibia; mid tibia paler on distal fourth 

 hind femur and tibia intensely dark brown throughout (fig. 91a) 

 TR 2.27; hind tibial comb with 5-8 spines. Wing as in figure 91c 

 halter brownish; CR 0.72. Abdomen dark brown with greenish 

 tinge, with large darker brown area on proximal terga (fig. 916) due 

 to specially modified pubescence, consisting of sharp appressed spinules 



