MALARIA 



211 



suffice as general guides. The female mosquito bites 

 a malarial person and receives the parasites into 

 her stomach. Here they undergo reproduction by a 

 sexual process, and appear in her venomosalivary 

 gland in a condition ready for transmission to the 



FIG. G6 



c d 



Body of Culex (a) when resting is held parallel to wall in a curved 

 position, that of Anopheles (6) stands at an angle of about 45 degrees and is 

 straight ; wings of Culex (c) are generally not spotted; those of Anopheles (d) 

 are spotted. (From Kolle and Hetsch.) 



next person bitten. This gland is connected with the 

 biting apparatus, and some of its secretioli is left under 

 the skin when the mosquito bites and sucks blood. It 

 is probably the secretion from this gland which causes 

 the itching of the ordinary mosquito bite. This repro- 

 duction in the mosquito requires seven to ten days. 

 When a person is bitten the parasites, left under the 



