76 THE MOSQUITOES OE EGYPT, THE SUDAN AND ABYSSINIA posterior cross-vein about half its length distant from the mid cross-vein; halteres with pale stem and creamy scaled knob.

Length. 5 to 5.5 mm. Habitat. Abyssinia (Isana, through Damot).

Observations. Described from four females. It is a large heavy built Culex, very like a large C. fatigans, Wied., but can at once be told by the dentate ungues. The thoracic ornamentation is marked in some very clearly, in others not so much.

A specimen sent by Dr. Balfour from the Sobat in very damaged condition seemed to be this species.

Culex fatigans, Wiedemann Auss. Zwei. Ins. p. 10 (1828), Wied. Mono. Culicid. II., p. 151 (1901), Theobald. Mono. Culicid. III., p. 225 (1903), Theobald Apparently very abundant along the Nile and its tributaries as elsewhere. Dr. Balfour has taken it on the Baro and Pibor, and reports it as by far the commonest mosquito in Khartoum. I have also seen specimens from Suez, Ismailia, and Cairo.

Culex pusillus, Bigot Dipt. Exot. 4th Supp., p. 9, Mono. Culicid. II., p. 166 (1901) This small thick set Culex has not occurred since Bigot’s specimens were taken. It is evidently distinct, and comes between Culex pipiens and C. fatigans.

Culex pipiens, Linnaeus Fn. Suec. (1758), Linnaeus; Mono. Culicid. II., p. 132 (1901), and III., 224 (1903) Recorded by Dr. Keatinge from Cairo, and from Suez by Col. Giles, late I.M.S. Also from Port Said and Ismailia (Major Ronald Ross, C.B.).

Genus Mansonia, Blanchard Panoplites, Theobald Comp. Rend. Hebd. Soc. d. Biol., No. 37, T. liii., p. 1046 (1901) Mono. Culicid. II, p. 173 (1901) Mansonia uniform,is, Theobald. (Panoplites uni for mis, Theobald. \Panoplites africanus, Theobald. (Plates II., Fig. 3 ; IV., Fig. 1 ; VI., Fig. 5) Mono. Culicid. II, p. 180 (uniform,is), p. 187 (africanus), 1901 ; III, p. 273 (1903) Specimens were taken at the following places:—Middle Sobat, Pibor River, Renk, and Kenissa by Dr. Balfour. Bahr-El-Ghazal (Cummins).

Probably occurs all over Egypt and the Sudan.