52 U.S. NATIONAL MUSEUM BULLETIN 2 83 



proximad part way along* vein Mi. Halter yellowish brown. Abdomen 

 yellowish brown; tergum I with 7 hairs on each side; posterior terga 

 (fig. 566) with sparse hairs in a row along posterior and side margins. 

 Genitalia (fig. 56c-e) broad; sternum narrow with broad, shallow 

 caudomedian excavation, the ventral membrane spiculate; tergum IX 

 moderately narrowed distally, rounded caudad with small pubescent 

 caudal lobes; basistyle stout, expanded mesad with strong mediangular 

 process; dististyle slender, slightly curved with distal point; aedeagal 

 sclerites bisinuate, slender, oriented nearly in transverse position form- 

 ing a low arch, outer margin at midlength with sharp sclerotized point 

 marking lateral attachment of the well-developed, poorly sclerotized, 

 platelike caudal accessory lobes of aedeagus: parameres each with 

 slender lateral lobe at base, main body narrowed at juncture with 

 basal lobe on proximal half, rather stout distad, apically bifid in 2 

 short points. 



Distribution.— Malaya. 



Type.— Holo type( male, Mt. Brinchang, 5000-6000 ft., Pahang, 

 Malaya, March 1963, H. E. McClure, light trap (USNM 69457). 



Discussion. — We are pleased to dedicate this species to its collector, 

 Dr. H. E. McClure of the U.S. Army Medical Research Unit at 

 Kuala Lumpur, Malaya, to whom we are greatly indebted for exten- 

 sive collections of Malayan Ceratopogonidae. This species is similar 

 to obesa, new species, from Indonesia in its general features, especially 

 the male genitalic structure, but obesa is distinguished by prominent 

 dark brown markings on the thorax and legs, the male aedeagal 

 sclerites are more strongly sinuate, broadly expanded, and oriented 

 more obliquely, and the paramere has the mesal point much lengthened. 



17. Stilobezzia (Neostilobezzia) magnitheca Das Gupta and Wirth, 



new species 



Figures 27, 57 



Female. — Length of wing 1.59 (1.50-1.72, n=6) mm; breadth 

 0.58 mm. 



Head: Eyes (fig. 57a) broadly separated, the separation broader 

 above. Head yellowish brown, narrow bases of antennomeres, lower 

 clypeus, and proximal palpal segments pale. Vertex with III-IV 

 lengths as 17-12-12-12-12-12-13-14-21-21-21-22-28; AR 1.87; 

 III-X elongate, cylindrical to binodose; XI-XV elongate, slightly 

 tapering distad; XV tipped by a stiff hair. Palpal segments (fig. 57c) 

 as 5-15-24-10-18, slender; with an open irregular depression at distal 

 fourth bearing numerous short sensilla. Mandible with 7-8 teeth 

 (av. 7.6, n = 5). 



Thorax: Yellowish brown without ornamentation, scutellum and 

 pleuron slightly paler; scutellum with 9 large bristles. 



