340 



F. W. EDWARDS. 



cross-veins, though variable in position, tend to be more approximated than in 

 C. pipiens, being occasionally almost in one hne. As in C. pipiens, the last two joints 

 of the male palpi have whitish markings beneath, but in this species the pale scales 

 tend to be arranged more in patches, one of which is at the tip of the last joint. 



The larva has been described by Bedford from the Transvaal (U.S. Afr. Dept. 

 Agr., 5th & 6th Repts. Director Vet. Res., 1919, p. 741), his description and 

 figure agreeing in the main with specimens I have examined, though he shows 

 shorter and more numerous tufts on the siphon. The accompanying figures are 

 based on Capt. Barraud's material. The siphon is distinctly longer than that of 

 C. pipiens. index about 5-5-6.* The pecten teeth are 6-9 in number, but rather 

 widely spaced, and reaching beyond a third of the length of the siphon. The 

 first few teeth are quite small, but the last four or five are long, curved, and almost 

 simple, only one or two small basal denticles being present. The antennae are 

 dark at the tip and at the extreme base, pale in the middle, the tuft being placed at 

 about three-fifths. The head is more or less extensively dark basally. The siphon 



T-ERZr ^ 



Fig. 15. Culex tipuliformis, Theo., head of larva. 



is generally all pale, but among the specimens sent by Capt. Barraud from Mesopotamia 

 there are several which have the basal half of the siphon dark or even black ; these 

 specimens also appear to have the siphon a little shorter than usual, but the adults 

 issuing from them do not differ appreciably from normal C. tipuliformis. 



Distribucion.—Atlantic islands ; Mediterranean region generally ; extending 

 through East Africa to the Cape and by way of Persia into north India and Assam ; 



* By the siphonal index I mean the ratio of the diameter of the base of the siphon to the 

 length, the valves not being reckoned into the length. Seguy apparently takes the ratio of 

 the average width to the length. 



