82 THE MOSQUITOES OF EGYPT, THE SUDAN AND ABYSSINIA Genus Uranota;nia, Arribalzaga. Dipt. Argentina, p. 63 (1899) ; Mono. Culicid. II., p. 241 (1901) Uranotcenia balfouri, n. sp.

(Plate VI., Fig. 6) Head with a broad black median band, pale blue on each side. Thorax brown with pale blue pro-thoracic lobes and a pale blue area in front of the roots of the wings. Abdomen brown, unbanded. Legs brown unbanded. Wings with brown scales, except a short row at the base of the fifth long vein.

Female. Head black clothed in the middle with flat black scales forming a broad median area, sides clothed with flat pale blue scales ; viewed in certain lights the back of the dark area of the head reflects deep rich blue colours; four prominent curved black bristles in front which project medianally and some short black ones between; antennae deep brown with paler nodes, basal-joint pale reddish-brown ; clypeus pale reddish-brown; palpi black ; proboscis black, nearly as long as the whole body.

Mesothorax brown with smaU narrow-curved brown scales, a short blue line on each side before the root of the wings; prothoracic lobes clothed with flat pale blue scales; scutellum brown, testaceous along the edge, lateral lobes with small flat black scales (mid lobe rubbed) ; four posterior border-bristles to the mid lobe; metanotum deep brown; pleurae brown, with a small median patch of pale blue scales.

Abdomen deep brown with rich deep brown scales and pale golden borderbristles, on the sides of the last three or four apical segments are traces of basal brown scales ; venter pale ochreous with brown border-bristles ; legs deep brown, bases testaceous, venter of femora pale ; ungues small equal, and simple ; wings with brown scales except at the base of the fifth long vein where there is a row of broad flat white scales ; costa and first long vein with very dark scales, long lanceolate and prominent lateral vein-scales on the second and third veins and a few on the fork of the fourth ; the second long vein lying very close to the first, the upper branch of the small first submarginal cell being particularly closely applied; the stem of the first submarginal cell about two and a half times as long as the cell, that of the first posterior slightly longer; posterior cross-vein twice the length of the mid and about its own length distant from it; mid cross-vein much shorter than the supernumerary; the scales on the fifth (except base) are dark and also on the sixth except at the apex which is nude in the specimen examined; halteres with testaceous stem and black knob.

Length. 2 mm. Habitat. Pibor.

Observations. Described from a nearly perfect female, the scutellum alone being damaged. 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 ordinary mosquito netting.