io8 



TROPICAL MEDICINE AND HYGIENE 



markings on the thorax are less conspicuous. These 

 mosquitoes are found, as a rule, in the vicinity of rivers 

 and lakes and may be very numerous. The mosquitoes 

 do not, like Cu lex fatigans, remain in the houses all 

 day but enter at dark, and bite most viciously for a few 

 hours after dark, leaving the houses before daybreak. 

 Mansonoides albipes often enters houses at daybreak, 

 and, therefore, though they can carry the worm, do not 

 have the same chances of acquiring the infection. 



FIG. 48. Stegomyia pseudoscutellaris in act of feeding, showing 

 stilettes entering the skin between the labellse of the buckled-up labium. 

 Drawn from life. (P. H. Bahr.) 



These mosquitoes are hardy, and can readily be kept 

 in captivity, but under such circumstances very rarely 

 deposit their eggs. 



The larvae and pupae are found in the sedges and grasses 

 at the edge of lakes and streams, and the adults are only 

 found in large numbers a comparatively short distance, 

 half a mile or so, from the banks. To clear the sedges 



