ii6 



DISEASES DUE TO PROTOZOA 



(3) A pair of slender mandibles expanded and very finely serrated 

 at the tip. (Absent in the males.) 



(4) A similar pair of maxilUe coarsely serrared ar tip. (Absent in 

 the males.) 



Sometimes the mouth parts of the males, which only live on juices, 

 appear to consist solely of the epipharynx and labium 



Photographs of living mosquitoes, C. impellcns. Walk.). Above $ and J in profile ;_in 

 the middle ventral aspects of the same; and beneath J and J dorsal views. About twice 

 natural size. 



Thorax is covered with scales or hairs. 



Scutellum is narrow, not lobed in .Anopheles, and is overlapped by 

 the menatonum, which is bare. 



Abdomen is long, narrow, scales or hairs, nine segments, last 

 bilobed, complicated in the male with a pair of chitinous clasping 

 hooks. 



The wings are as described above; all the veins are clad with scales, 

 lanceolate in shape for Anopheles. 



