376 



THE MOSQUITOES 



disease by biting a nonimmune to yellow fever for a period of twelve days. After 

 this time the mosquito remains infective for its life in one instance fifty-seven days. 



S. sGutdlaris has a single silver stripe down the center of thorax. Mosquitoes 

 of this genus are often called "Tiger mosquitoes." The larvae have short, barrel- 

 shaped siphons. They breed particularly in receptacles about the house. 



S. pseudoscutellaris, which resembles S. scutdlaris, but has white bands only, at 

 the sides of the abdominal segments, is thought to transmit filariasis in Fiji. 



Culex. Male palpi long and acuminate. Head has narrow curved and upright 

 forked scales. Laterally, flat scales. C. fatigans supposed to carry dengue as well 

 as Filaria bancrofti. It also transmits Proteosoma of birds, the life history of which 

 in this mosquito paved the way to the epochal discoveries in connection with malarial 



FIG. 101. Culex pungens, male. (After 

 Howard.) From P. H. Reports. 



FIG. 102. Culex pungens, female. (After 

 Howard.} From P. H. Reports. 



transmission by anophelines. This is a brown mosquito with pale yellow banding 

 of each abdominal segment. The legs are brown except for the coxae and femora. 



Theobaldia. These Culicinae have spotted wings resembling Anophelinae. 

 These spots are due to aggregations of scales, not to dark scales. Male palps are 

 clubbed (like Anopheles). 



Mucidus. This genus has a mouldy look from long twisted gray scales. The 

 legs are densely scaled. 



Mansonia. This genus is characterized by broad flat asymmetrical wing scales. 

 As the wing scales are brown and yellow the wings are mottled. 



Grabhomia. Wings have pepper-and-salt appearance with short fork cells. 



Taniorhynchus. This genus is characterized by dense wing scales, which are 

 broadly elongated with truncated apex. 



Acartomyia, Much like Grabhamia, but scales of head give ragged appearance. 

 Male palpi clubbed. 



A. zammittii was supposed to be concerned in Malta fever, but it is known now 

 that transmission is by medium of milk of infected goats. 



