ARTHROPOD A 



or it may be a few ounces in an upturned tomato can; it must, however, 

 be still or the female cannot light upon its surface to deposit her 

 eggs, hence rapid streams do not breed mosquitoes. The eggs hatch, 

 depending on the species and upon the conditions, as soon as 16 hours 

 after being laid, perhaps even sooner. The larvae, Fig. 66 and 67, 



FIG. 64. Yellow-fever mosquito, Stegomyia calopus (faciata). 

 Insects and Diseases, by Neivstead.) 



(After Doane, 



work out of the lower side of the eggs and begin their life as wrigglers, 

 coming to the surface at frequent intervals to breathe through the air- 

 tube near the end of the tail; this larval life may last from one to three 

 or more weeks, during which time the insect molts several times until 



