NATURAL REMEDIES. 117 



diurnal ; that the mosquito nestles in tall grass, seeks the 

 protection of trees and shrubs, and is practically hidden 

 in the edges of copses and woods. 



Under these circumstances the dragon fly will not find 

 its prey. Great numbers will escape ; only those en- 

 countered in its busy flight through the air will be cap- 

 tured, for the dragon fly does not hunt for its booty nor 

 scour the forbidden shadows of woods and forests, and at 

 nightfall the mosquito will elude his pursuer and rise to 

 his murderous intent. 



Besides, as I pointed out in the Discussion of the 

 Problem, the remedy should be complete and unassail- 

 able and fit the widest variety of conditions. The dragon 

 fly may in some genial locations suit the elements of the 

 question and be of practicable service ; it may, indeed, be 

 more widely beneficial than we suspect, as the references 

 above made would seem to show ; but the preliminary ex- 

 perimental stage of rearing dragon flies and studying their 

 jjrcparatory stages must be first successfully examined. 



For this purpose I have given in Appendix B a biblio- 

 graphical catalogue of all the known transformations of 

 the Odonata of the world, and have also inserted in the 

 same place a short sketch of the mode of oviposition and 

 description of the egg of Libellula, Plathemis, and Di- 

 plax. I have also, for the convenience of collectors, 

 added a list of species of Odonata found in New York 

 State, with special reference to those found in the vicinity 

 of New York City. 



Fish and Water Fowl. 



I consider, in the second place in natural remedies, the 

 importance of fish and water fowl for the subjection of 



