122 U.S. NATIONAL MUSEUM BULLETIN 283 



by 0.068 mm), oval in shape, and tapering to a moderately long 

 slender neck, no hyaline perforations. Genital sclerotization as in 

 figure 89g. 



Male.— Length of wing 1.41 (1.22-1.45, n=21) mm. 



Similar to the female with the usual sexual differences; tergum 

 (fig. 89h) as in the female; antennal plumes dark brown; tarsomere V 

 without batonnets; claws small, equal, with bifid tips. Genitalia 

 (fig. 89fc-m) with tergum IX short, rounded caudad, with small 

 caudomedian cleft, the pubescent caudal lobes well developed; 

 sternum IX with shallow caudomedian excavation, the membrane 

 spiculate a short way; basis tyle slender distally but stout at base 

 with stout, hooklike basidorsal process; dististyle stout and curved; 

 aedeagal sclerites slender arcuate blades with clavate caudomedian 

 tips and distinct basal knob; parameres each with small, caudally 

 projecting basal processes, main body intensely sclerotized, moderately 

 stout, sinuate, with distal ends curving mesally and ventrally to end 

 in bluntly pointed tip. 



Distribution. — -Sumatra, Java, Japan, Malaya, North Borneo, 

 Sarawak, Thailand, Viet Nam. 



Material examined. — 408 specimens. 



INDONESIA: West Java, Djakarta (Rees). 



JAPAN: Honshu, Kyoto Pref., Midoro Pond (Arnaud). 



MALAYA: Pahang, Kuala Singgora (Wharton); Perak, Pulau Pangkor 

 (Traub) ; Selangor, Kuala Lumpur (Hubert, McClure, Traub) ; Selangor, Subang 

 Forest Res. (McClure); Singapore (Colless). 



NORTH BORNEO: Tambunan (Colless); Tawau (Colless). 



SARAWAK: Kampong Pueh, Lundu Dist. 700-1500 m (collector ?) ; Kuching, 

 Santubong, 800-1500 m (Quate). 



THAILAND: Ayudhaya (Manop R.) ; Bangkok, Thonglo (Scanlon) ; Chiang 

 Mai (Gressitt, Notananda, Scanlon); Cholburi, Bangphra (Scanlon); Khon Kaen 

 (Manop R.) ; Loei (Manop R.) ; Minburi (Manop R.) ; Nakhon Prathom (Manop 

 R.) ; Nakhon Ratchisrima (Manop R.) ; Nong Kai (Manop R.) ; Pechaburi 

 (Manop R.); Ratchaburi, Banpong (Manop R.) ; Samuthprakan (Manop R.); 

 Thonburi (Manop R.). 



VIET NAM: Pleiku (Quate). 



Discussion. — The intensely dark hind femur without distal pale 

 markings, the uniform numerous scattered long setae on the proximal 

 abdominal terga, absence of special shagreenlike lateral pubescence 

 in this area, and the intensely dark halter will distinguish subviridis 

 from other members of the group. Females from Thailand often have 

 the mid femur paler on most of the proximal portion, but typical 

 specimens have it entirely dark. We have not been able to identify 

 any species in this group corresponding to the one female Macfie men- 

 tioned as an exception as "In one female the tibiae are entirely dark 

 brown. This specimen is darker than the others but otherwise ap- 

 parently indistinguishable from them." We note in Tokunaga and 



