73 THE MOSQUITOES OF EGYPT, THE SUDAN AND ABYSSINIA Observations. Described from a single perfect female. Dr. Balfour sends the following notes regarding it which show that differences of colour exist between fresh and dried specimens“ proboscis brownish yellow with a purple or black band or tuft near the labels. Thorax, ground colour purple, xlbdomen purple with median line of pale scales and two yellowish lateral patches on the last segment.” There may be a minute tooth on each fore unguis, but I do not think so; the mid and hind are anyway equal and simple. The differences in color between the areas of the wing are very marked.

Genus Theobaldia, Neveu-Lemaire Compt. Rendus. d. Seas. d. la. Soc. d. Biol., 29 Nov. (1902). (Neveu-Lemaire) ; Mono. Culicid. HI., p. 148. Theobald (1903).

Theobaldia spathipalpis, Rondani Culex spathipalpis, Rondani (Plate VI., Fig. 1) Dipt. Ital. Prodro. I. (1886), Rondani; Mono. Culicid I., p. 339 (1901), and III., p. 154 (1903), Theobald.

Adults, larvffi and pupa3 of this species, have been sent me by Dr. Balfour from Khartoum North. Both male and female are somewhat pallid, but the thoracic ornamentation is very marked, the wing spots paler than in most specimens, almost absent.

Genus Culex, Linnaeus Linn. Syst. Nat. (1735) ; Mono. Culicid. I., p. 326 (1901) Culex viridis, Theobald Mono. Culicid. III., p. 212 (1903) This is apparently a widely distributed African species, being especially abundant in Central Africa. I originally described it from Uganda specimens. It varies much in size ; some sent by Dr. Balfour being 3.5 mm. only, others 4.5 mm. Dr. Balfour collected it from the Sobat, Baro, Pibor, Lado. The specimens show considerable variation in regards to the length of the fork-cells, position of the cross-veins and size.

Dr. Balfour mentions in regard to one specimen that the “ legs were rich reddish-brown.” They are dull brown in the dried specimens.

The lateral abdominal spots also vary, usually basal, but some are found to be central and others apical, yet others where the -spot spreads all along the side of the segment. It is the only species so far found in Central and West Africa with an unbanded abdomen, otherwise it looks much like C. fatigans. The Sudanese specimens do not show so clearly the greenisli pleuras seen in Uganda specimens.

Culex pallidocepliala, n. sp.

Somewhat like C. fatigans but the head with rather dense, pale, narrow-curved scales and numerous dark brown to black upright-forked ones. Palpi and