18 U.S. NATIONAL MUSEUM BULLETIN 2 83 



those next to interorbital bridge smallest. Male antenna with dark, 

 well-formed plume; female antenna bicolored, segments strongly 

 cylindrical. Palpal segment III with subapical pit bearing short 

 sensilla. Female mandible with several subequal teeth, smooth on 

 outer margin. Scutellum always very pale with both large and small 

 bristles; scutum with a few dark vittae and pale spots dorsally. 

 Wing unmarked, with faint brownish infuscation, the anterior veins 

 often strongly infuscated and surface microtrichiae well sclerotized; 

 stem M usually slightly longer than r-m; costa with moderately 

 numerous setae, ending well into distal third of wing; R x almost 

 in a line with r-m; M 2 totally visible. Legs with hind tibia dark at 

 both ends and usually also broadly dark in middle, other leg segments 

 also frequently dark at ends; hairs weak; fore femur of both sexes 

 with 2-4 short stout spines midventrally; hind male trochanter 

 without stout spine; hind tibia with 2-5 distal bristles on extensor 

 side distinctly shortened and thickened; tarsomere V with ventral 

 batonnets on all legs in both sexes; male claws similar to those of 

 female. Spermathecae without hyaline perforations. Female genital 

 sclerotization with sternum IX produced in 2 triangular submedian 

 lobes; submedian internal lamellae with capitate, concaved mesal 

 ends. Male genitalia with tergum IX bearing subdivided, setose, 

 submedian lobes caudoventrally; basistyle with a broad, flattened, 

 sclerotized lobe produced caudomesally from inner margin toward 

 base; aedeagal sclerites in form of caudally converging rods, their 

 distal tips often forming a foot-shaped process, a broad platelike 

 expansion present on posterior margin; parameres each with mod- 

 erately long lateral process at base, the connection to main portion 

 of paramere narrowed; main body of paramere long and linear, 

 well sclerotized, with spiculose tip often subapically inflated. 



Species included: Stilobezzia africana (Ingram and Macfie), West 

 Africa; amnigena (Macfie), Brazil; clarifemorata, new species, Malaya 

 and North Borneo; dorsofasciata (Lutz), Brazil; elegantula (Johannsen), 

 North America; joyi (Ingram and Macfie), West Africa; fuscipes, 

 new species, Thailand ; fusciterga, new species, Malaya and Thailand; 

 maculitibia Lane and Forattini, Panama; minuta, new species, Thailand 

 and Malaya; punctifemorata, new species, Malaya, Ceylon, and 

 Thailand; versicolor (Ingram and Macfie), West Africa. 



1. Stilobezzia (Eukraiohelea) clarifemorata Das Gupta and Wirth, new species 



Figures 38, 41 



Female. — Length of wing 1.26 mm; breadth 0.48 mm. 

 Head: Brownish, antenna yellowish on narrow bases of XI-XIV 

 and all except narrow apices of III-X; vertex with 10 hairs. Antenna 



