THE JIOSQUITOES OF EGYPT, THE SUDAN AND ABYSSINIA 78 



Observation!^. 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 s^jecirnens : — " proboscis brownish yellow with a purple or black 

 band or tuft near the labell*. Thorax, ground colour purple. Abdomen 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 ai'e any^vay equal and simple. The differences in 

 color between the areas of the mng are very marked. 



Genus Theobaldia, N^eveu-Lemaire 

 Compt. Rendus. d. Seas. d. la. Soc. d. Biol, 29 Nov. (19(»2). (Xeveu- 

 Lemaire) ; Mono. Culicid. III., p. 148. Theobald (1903). 



Theobaldia spathipalpis, Rondani 

 Culex spatJiipalpis, Rondani 

 (Plate VL, Fig. 1) 

 Dipt. Ital. Prodro. I. (1886), Rondani; Mono. Culicid I., p. 339 (1901), and 

 III., p. 154 (1903), Theobald. 



Adults, larvas and pupaj 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 Aving spots paler than in most 

 specimens, almost absent. 



Genus Culex, Linnaeus 



Linn. Syst. Nat. (173.5) ; Mono. Culicid. I., p. 320 (1901) 



Culex viridis, Theobald 



Mono. Culicid. III., p. 212 (1903) 



This is apparently a widely distril^uted Afi'ican species, being especially 



abundant in Central Afi'ica. I originally described it from Uganda specimens. 



It varies much in size ; some sent by Dr. Balfour being 3.5 min. 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 bro-\vn 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 aU along 

 the side of the segment. It is the only species so far found in Central 

 and West Afi'ica with an unhanded abdomen, othermse it looks much like 

 C. fatigans. The Sudanese specimens do not show so clearly the gi-eenish 

 pleurae seen in Uganda specimens. 



Cidex /xilh'diiffpJidla, n. sp. 



Somewhat like C f align iis liut the lu'ad Avith i-ather dense, pale, narrow-curved 

 scales and numerous dark lir^wn to black upright-forked ones. Palpi and 



