38 Mosquitoes 



and never leave much irritation if driven away. >S. 

 calopus is not noticed at the time of attack, but the 

 spot becomes extremely painful afterward and shows 

 a white lump. 



Hibernation. — The places in which the adult mos- 

 quitoes pass the winter are various. It seems that 

 only the females hibernate, as a rule, and that these 

 are impregnated in the fall. Usually not until after 

 the first biting in the spring are the eggs deposited. 

 The insects seek safe hiding-places in cellars, hollow 

 trees, under loose bark on dead trees, under weather- 

 boarding— any situation where they are protected, 

 are in the dark and will not desiccate. Dryness is ex- 

 tremely fatal to them. If the breeding cages or jars 

 are dry, or if one attempts to transport them for any 

 distance in a dry tube plugged with dry cotton, they 

 will die. But if there is water in the cage, or if the 

 cotton plug is damp, they will live for days, even in a 

 tube, providing that it is not in the sun or in a warm 

 place. They are truly not the children of light. Dr. 

 Berkeley mentions their fondness for hanging on cob- 

 webs in dark corners of clothes closets, and their re- 

 sorting to greenhouses, during the winter. 



The author has found them, especially AnopJieles, 

 multiplying in winter in the tanks and water barrels 

 in the Botanical Gardens of Washington, D. C. As 

 an odd instance of tenacity the following is an 

 example : 



Having read the descriptions of W. smitkii, it did 

 not seem logical for that species to have but two 

 anal gills, when all other mosquito larvse had four or 

 the rudiments of them. Having examined alcoholic 



