CCLICID FAUNA OF THE ADEN HINTERLAND. 633 



The feeding brushes are placed laterally. This larva is exceedingly charac- 

 teristic. It suspends itself in the water like a culex larva. From the head up 

 to the 2nd segment are submerged. 



The egg was not found. 



Habitat and Observations. — This species was only found in one spring, the 

 Aziriki spring, near D'thala, where it was breeding in the pools with Anopheles 

 tibani. It is a wild species. Mr. Theobald agreed with me that it was closely 

 related to A . turklandi Liston. The main differences are as follows : — The costa 

 has five white scaled portions, the 3rd long vein has black spots and the wing 

 fringe has no light areas, but is dark throughout. There is no long branched 

 hair at the end of the antennse which is well marked in the larva of 

 A. turklandi. 



I came across this species quite by accident, when studying A. tibani 

 a large number of larvae were collected and examined, this larva was found 

 among them. It is difficult to find if scarce, as it lies up, among green weeds, etc., 

 and seems to have the capacity of remaining a longer time below the surface than 

 the larvse of the other four species. It is easily frightened. Many attempts 

 were made to procure its eggs, but all failed. 



Culex arabiensis n. sp. 



Thorax straw coloured with brown curved scales, with a dark line down the 

 centre and two at the sides. Abdomen brown with apical black bands. Tarsi 

 banded at all the joints, fore ungues unequal and uniserrated. 



Female. — Head brown covered with brown upright forked scales, some darker 

 than others, with many narrow brown curved scales ; along the eyes there are 

 black bristles projecting forward and two marked tufts spreading over the 

 clypeus. Antennas pale in centre and darker at all joints. Palpi dark brown 

 with a small apical white spot, proboscis and clypeus are both dark brown. 



Thorax, prothoracic lobes simple with a few dark bristles. Dorsum of 

 thorax is straw coloured, covered with brown curved scales. There are black 

 bristles at the sides ; scutellum is dark with a few Darrow curved scales on each 

 lobe. 



There are from 7 to 9 bristles on the mid-lobe and four on each lateral lobe ; 

 metanotum is brown. 



Abdomen apical black bands consisting of brown broad tile-like scales. Each 

 segment has a large number of brown bristles at the sides and on the dorsum. 

 There are cream coloured tile-like scales on the central surface. 



Legs coxae brown, femora brown but not densely scaled, pale at the tibio- 

 femoral joint. Tibia? brown with well marked pale band at the tibio-metatarsal 

 joint. Metatarsi densely scaled with a band at both ends. Tarsi are 

 densely scaled with pale bands at all the joints. Fore ungues unequal and 

 uniserrated. 



Wing. — Veins have brown scales. Costal, sub-costal and 1st longitudinal are 

 darker than the remainder. 1st sub-marginal cell is nearly twice as long as the 

 2nd posterior cell. 



