44 U.S. NATIONAL MUSEUM BULLETIN 2 83 



proximal section before IRC; tarsal claws equal, sharp tips not bifid; 

 ventral spines on tarsomeres I— III of fore leg as 0-0-1, 0-0-1, 0-0-1. 

 Genitalia (fig. 5lh-j) well sclerotized, brownish, profile nearly cir- 

 cular in ventral view; sternum IX without caudal emargination or 

 spicules on ventral membrane; tergum IX short, narrowed on distal 

 portion, and bearing numerous long bristles on dorsal surface; basi- 

 style broadest at mediangular process, the latter small, a low ventral 

 lobe arising at mesal margin at this point; dististyle long, curved, 

 slenderer in midportion; aedeagal sclerites heavily sclerotized, bisinu- 

 ate, slender at both ends, the caudomedian end abruptly bent caudad 

 in a slender point; parameres each with large, detached anterolateral 

 plate; main body stout at base, slightly narrowed in midportion, 

 distally flattened and expanded in a platelike tip produced 

 caudoventrad. 



Distribution. — Philippines. 



Types. — Holotype male, Clark Air Base, Angeles, Pampanga 

 Prov., Luzon, Philippines, 22 Apr. 1957, I. Balatbat, light trap 

 (USNM 69452). Allotype female, 1 female paratype, same data 17 

 Sept. 1957; 1 female paratype, same data as holotype. 



Discussion. — Stilobezzia brandti Tokunaga from New Guinea is 

 similar, but is much larger (wing 1.4-1.74 mm long); the hind claw 

 of the female has the shorter ungue nearly as long as the longer; 

 tergum I bears a tuft of 8-16 hairs on each side, and the male dististyle 

 has a stouter tip. $. thyridofera Tokunaga from New Guinea has a 

 setose radius in the female exactly as in conslans and similar male 

 genitalia, but also is a much larger species with a stouter tip to the 

 male dististyle. 



12. Stilobezzia {JSeostilobezzia) crassivenosa Das Gupta and Wirth, 



new species 



Figures 29, 52 



Female. — Length of wing 1.16 (1.06-1.28, n=10) mm; breadth 

 0.47 mm. 



Head: Reddish brown; palpi and antennae brownish, narrow bases 

 of antennomeres III-X paler. Eyes narrowly separated, the inter- 

 orbital space (fig. 52a) broader caudad. Antenna (fig. 29) short, 

 III-XV with lengths as 10-6-6-6-6-6-7-8-10-10-11-12-18; AR 1.11; 

 III-X somewhat elliptical, IX-X with preapical collar, XI-XV 

 cylindrical, XV with apical seta. Palpal segments (fig. 52e) with 

 lengths in proportion of 4-12-16-10-18, III slender with a shallow 

 subapical pit with short sensilla. Mandible with 8 teeth. 



Thorax: Yellowish brown; scutellum with 4 large bristles. 



Legs: Uniformly yellowish; femora and tibiae with hairs moderately 

 strong, hind tibia with 5-6 strong extensor bristles; claws (fig. 52c) 



