MOSQUITOS OF THE PALAEARCTIC REGION. 



321 



name). Fig. 10 illustrates well the difference in vestiture of the first abdominal 

 segment in the two species ; the following segments in both have the hairs longer. 

 (In the case of A. echinus both the skins preserved by Capt. Waterston are much 

 distorted, and careful reconstruction was necessary.) The larva of A. echinus 

 also differs from that of A . geniculatus in the distinctly longer antennae, which are 

 much more extensively pale towards the tip, in the much more numerous pecten 

 teeth, which are in a straighter row, in the somewhat smaller siphon and somewhat 

 larger comb teeth, as well as in some other details, perhaps not constant. 



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TSFIZI —J 



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Fig. 11. Aedes echinus, Edw., end of abdomen of larva.; comb and pecten teeth and mentum 



more highly magnified. 



The pupa differs from that of A . geniculatus in having the paddles more strongly 

 emarginate and the terminal hair placed at some distance outside the tip of the 

 midrib. 



Distribution. — ^Macedonia (Stavros, Waterston ; reared from larvae in hole in 

 plane tree ; many adults of A. geniculatus also found in the same locality) ; Morocco 

 (Fez, Fowler) ; Algeria [Sergent). 



