Genus Stegomyia, 



183 



Abdomen deep blackish brown with silvery-white basal bands, 

 except the first segment, which is all deep brown with pallid 

 bristles, large basal white lateral spots to each segment. 



Legs with anterior femora and tibiae black, first and second 

 tarsals with broad basal white bands, last three tarsals black, 

 a trace of a pale basal band on the tibia ; in the mid legs the 

 femora are pale at the base and have a small round white spot 

 towards the apex which is white, remainder as in fore legs ; hind 

 legs with femora white along the basal half, an oval elongate 

 silvery spot towards the apex, the latter snowy white, base of 

 first, second and third tarsals broadly white banded, fourth 

 tarsal all black, fifth pure white. Ungues all equal and 

 simple. 



Wings with the first sub-marginal cell longer and narrower 

 than the second posterior cell, its base nearer the base of the 

 wing than that of the second posterior, its stem about one-third 

 the length of the cell, stem of the second posterior about as long 

 as the cell ; posterior cross-vein about two and a half times its 

 own length distant from the 



mid cross-vein ; the median vein 

 scales on the fifth, where the 



branch arises, in two prominent 



lines. 



Halteres with pallid base and 



dusky scaled knob. 



Length. — 3 • 5 to 4 * 5 mm. 

 £ . Thoracic adornment simi- 

 lar to that of the female. Palpi 



black with a white patch at the 



base of the two apical segments 



on one side only, that at the base 



of the apical one largest and a 



broader white band towards the 



base, and another small one still 



nearer the base ; the two apical 



segments nearly equal, the apical 



one slightly the shorter, both 



and the apex of the antepenultimate with long scattered brown 



hairs, apical segment rounded at the tip. 



Antennae with deep brown plume-hairs and pale internodes. 

 Abdomen as long as in the female ; fore and mid ungues 



unequal, simple, the larger one in the fore pair rather more 



Fig. 52. 



Male genitalia of Stegomyia simpsoni. 



Theobald. 



