Genus Uranotaenia. 563 



Legs deep brown with bronzy sheen (ungues absent). 



Wings with brown scales very similar to those of the female, 

 and with a row of flat white scales at the base of the fifth long 

 vein ; the upper branch of the first fork-cell not as close to the 

 first longitudinal vein as in the female ; the stem of the second 

 posterior about one and a half times the length of the second 

 fork-cell, the mid cross-vein longer than the others. 



Length. — 2 mm. 



Habitat— White Nile and Pibor (Dr. Balfour). 



Observations. — Described from a nearly perfect male and 

 female, but with somewhat rubbed body. Two other females are 

 just as in the type. The male wing venation cannot well be 

 made out, as only one wing was left on the specimen, and that 

 was crumpled, but the general appearance is that of the female. 

 Dr. Balfour states that it is very common on the Pibor, and 

 very annoying in the evening. It is a very small species that 

 may easily get through mosquito netting. 



It is closely related to Uranotaenia caeruleocephala^ Theobald 

 (Mono. Culicid., Vol. II., p. 256), but can be told at once by the 

 head having a broad area in the middle of flat black scales, and 

 by the thoracic markings being blue instead of white. 



Uranotaenia atra. Theobald (1905). 

 Ann. Mus. Nat. Hung., III., p. 114 (1905). 



Head black with dull brownish violet scales. Thorax black 

 with brown scales, and a grey scaled line over the roots of the 

 wings. Abdomen black. Legs uniformly dark brown. 



9 . Head black with flat dusky scales, the lateral areas 

 showing dull brownish violet, scattered over the whole surface a 

 few large deep brown upright forked scales. Palpi, antennae 

 and proboscis deep brown. 



Thorax black with bronzy narrow-curved scales, except for a 

 line of grey ones over the roots of the wings, and black bristles 

 over the roots of the wings ; scutellum black with flat black 

 scales; metanotum nude, black ; pleurae black (denuded). 



Abdomen black, unhanded ; venter black. 



Legs brown, the swollen mid femora testaceous below, the 

 others at the base ; ungues small, equal and simple. 



Wings with the first sub-marginal half the size of the second, 

 its stem three times as long as the cell. Stem of the second 

 posterior one and a half times as long as the cell ; posterior cross- 



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