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U.S. NATIONAL MUSEUM BULLETIN 2 83 



45. Stilobezzia (Stilobezzia) nudisthmostheca Das Gupta and Wirth, 



new species 



Figures 18, 87 



Female. — Length of wing 1.41 (1.32-1.58, n=5) mm; breadth 

 0.50 mm. 



As in subviridis Macfie with the following differences: Antenna 

 (fig. 18) with lengths of III-XV as 16-9-9-9-9-9-9-11-22-23-24- 

 25-40; AR 1.65; palpal segments as 4-13-24-13-22; mandible with 

 6-8 teeth. Legs colored as in subviridis, but mid tibia dark brown on 

 proximal two-thirds, yellowish distally (fig. 87a) ; hind leg with lengths 

 from femur to V as 95-85-44-21-6-5-14; TR 2.1; hind tibial comb 

 with 8-9 spines. Wing (fig. 97c) with CR 0.76; r-m to stem M lengths 

 as 1:3. Halter knob intensely brownish. Abdomen (fig. 876) with 



Figure 87. — Stilobezzia nudisthmostheca, new species (?). a, femora-tibiae of mid and 

 hind legs; b, abdominal terga I-IV; c, wing; d, spermathecae; e, ? genitalia. 



terga intensely dark brown; I with central pale area extending nearly 

 to sides; II-IV with bristly hairs scanty, absent from anterolateral 

 corners of segments. Spermatheca (fig. 87c?) 1, ovoid without sclero- 

 tized neck, measuring 0.900 mm by 0.063 mm. Genital sclerotization 

 as in figure 87e. 



Male. — Unknown. 



Distribution. — Ceylon; Japan, Philippines. 



Types. — Holotype female, Colombo, Kalutaluwewa, Ceylon, 19 Feb. 

 1958, Med. Res. Inst, light trap (USNM 69480). Paratypes, 3 

 females. CEYLON": Same data as type, 1 female. JAPAN: Tokyo, 

 Thaxter collector, 1 female. PHILIPPINES: Mindanao, Agusan, 

 Esperanza, 4-11 Nov. 1959, C. Yoshimoto, light trap, 1 female. 



Discussion. — Such scattered distribution on the basis of so few 

 specimens is strange, but there is such good agreement on the dis- 

 tinctive characters given above that we are fairly confident of the 



