Fig. 1. — Adults of Culex and Anopheles: a, Culex solUcitans ; 

 I), Anopheles punctipenms. Enlarged (author's Illustra- 

 tion). 



155 



it has been ob- 

 served that when 

 Culex is resting 

 upon a wall it ap- 

 pears more or less 

 humpbacked, that 

 is to say, the head 

 and the beak are 

 not in the same 

 plane with the 

 body and wings, 

 but project at an 

 angle toward the 

 surface of the wall, 

 the body and 

 wings being par- 

 allel with the wall. 

 With Anopheles, 

 however, the head 

 and beak are in 

 practically the 

 same plane with the 

 body, and the body 

 itself is usually 

 placed at an angle 

 with the wall, and 

 especially w h e n 

 resting upon a hor- 

 izontal wall, such 

 as the ceiling of a 

 room, the body of 

 Anopheles is at a 

 very gieat ajigle 

 with the surface. 

 We have in this 

 country three spe- 

 cies of the mala- 

 rial genus Ano- 

 pheles, namely. 

 Anopheles maculi- 

 pennis (illustrated 

 in fig. 2), Ano- 

 pheles punctipen- 

 nis (shown in fig. 

 1, 6), and Ano- 



