First report of the Wellcome Research Laboratories at the Gordon Memorial College, Khartoum / by Andrew Balfour.

  • Balfour, Andrew.
Date:
1904
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: First report of the Wellcome Research Laboratories at the Gordon Memorial College, Khartoum / by Andrew Balfour. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    Genus Uranottenia, Arribalzaga. Dipt. Argentina, p. 63 (1899); Mono. Culicid. II., p. 241 (19Ul) Uranotoenia halfouri, 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, unhanded. Legs brown unhanded. Wings with brown scales, except a short roAV at the base of the fifth long vein. Female. Head black clothed in the middle with flat black scales formino; 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; antennaa 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; pleuras browu, with a smaU median patch of pale blue scales. Abdomen deep brown with rich deep brown scales and pale golden border- bristles, 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 broAvn, 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 roAv 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 fi.rst, 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 ceU, .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 scutellmn 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.