56 U.S. NATIONAL MUSEUM BULLETIN 2 83 



neck, measuring 0.058 mm by 0.049 mm and 0.051 mm by 0.042 mm. 

 Genital sclerotization as in figure 58g; peculiarly formed, with a deep 

 mesal cleft on sternum IX, genital opening flanked by a pair of small 

 sclerotized lips. 



Male. — Length of wing 0.80 mm. 



Similar to the female with the usual sexual differences; antennal 

 plumes dark brown. Genitalia (fig. 58h-j) with tergum IX elongate, 

 slightly bilobate caudad with long pubescent submedian lobes; sternum 

 IX with shallow caudomedian excavation, the ventral membrane 

 finely spiculate; basis tyles apparently without any distinguishable 

 mediangular process or connecting mesal band; dististyle elongate, 

 slightly curved, the distal portion not tapered, with blunt tip; aedeagal 

 sclerites bisinuate in typical Stilobezzia conformation, each sclerite 

 nearly straight proximally, with abrupt swelling on outer margin at 

 midlength, the caudomedian tip with sharp point directed caudo- 

 mesad; parameres each with detached L-shaped lateral sclerite at base, 

 main body with slender base, slightly swollen and crooked in mid- 

 portion, distally narrowed into sharp hyaline point directed caudad. 



Distribution. — Malaya. 



Types. — Holotype female, Bukit Besi, Dungun, Trengganu, 

 Malaya, 6 Aug. 1958, R. Traub, light trap (USNM 69459). Allotype 

 male, same data except collected 26-28 Feb. 1961 by A. A. Hubert. 

 Paratype, 1 female with data same as holotype. 



Discussion. — This species is readily distinguished by its uniform 

 yellowish brown color, dusky halteres, faint radial venation, long 

 antenna, short palpus, weak abdominal setation, peculiar female 

 genital sclerotization, and colorless spermathecae. The male genitalia 

 are similar to those of jasciscutata, new species, but differ specifically 

 in each part. 



19. Stilobezzia (Neostilobezzia) obesa Das Gupta and Wirth, new species 



Figure 59 



Female. — Unknown. 



Male. — Length of wing 1.21 mm. A bright yellowish species with 

 dark brown markings on scutum and apices of femora. 



Head: Brownish, antennae and palpi dark; distal antennomere 

 without terminal seta; palpal segment III longest, slender with a 

 definite pit. 



Thorax: Yellowish brown, dark brown spot on pleuron above 

 fore coxa; scutum darker on disc and on marks along side margins; 

 postscutellum brownish; scutellum with 4 large bristles. 



Legs: Pale yellowish, coxae and trochanters brownish; knee spots 

 dark brown, with brown area extending proximad slightly on hind 

 femur, fore and hind tibia with narrow apices brownish; hairs on 



