A REVISION OF THE GENUS LEPTOCONOPS, SKUSE. 



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few (three pairs) relatively short black hairs ; eyes widely separated above and below, 

 the space between them at the vertex being rather more than one-third the greatest 

 width of the head. Proboscis dark brown. Palpi (fig. 2, e) dark brown, the apical 

 segment yellowish brown, clothed with short dark hairs ; apparently composed of 

 three segments, the two small basal segments being almost fused together ; orifice 

 of the sensory pit in the third segment small, subcircular, situated in the 

 proximal third. Antennae (fig. 5,/) relatively short, dark brown, with short glistening 

 hairs and short, straight or slightly curved spines ; segments 4 to 13 transversely 

 oval to subspherical, the length varying from 0-6 to 0-8 of the breadth, the fourteenth 



Fig. 10. Acaitthoconops spinosifrons , sp. n., 9 : a, front leg (x 85) ; b, first and second tarsal 

 segments of front leg (x 295) ; c, hind leg (x 85) ; d, first and second tarsal segments of hind 

 leg ( X 295) ; e, fifth tarsal segment of hind leg ( x 550). 



segment equal in length to the preceding two and one-half segments together. Thorax 

 and scutellum shining black, the dorsum clothed with short brown hairs ; scutellum 

 bearing two pairs of large, and one or two pairs of small bristles ; pleurae and pectus 

 shining black. Wings glassy, strongly iridescent ; the anterior veins as shown in 

 fig. 8, /, the fifth vein bifurcating almost immediately below the extremity of the 

 third vein. Halteres with white knobs and infuscated stems. Legs (fig. 10) pale 

 brown, the distal two-thirds or three-fourths of the femora, and the distal third of the 

 fore and hind tibiae, black, clothed with brown hairs ; tibiae each with a strong 

 apical spur, fore tibiae incrassate, hind tibiae with five strong, blunt, black spines on 



