68 DRAGON FLIES VS. MOSQUITOES. 



Hungarian, Scandinavian, et al., and whieli have been ab- 

 stracted in papers more accessible to all. 



It is believed that all sqmrate papers or works which 

 have a direct bearing on this general subject, and which 

 are not excluded by the foregoing rules, will be found in 

 the list, if they were published during the last twenty- 

 five years. In selecting papers of an earlier date, greater 

 freedom has been taken in rejecting such as seemed purely 

 introductory and elementary. The combined results of 

 most of these are now found in our standard text books 

 on the classification of insects. Medical works and jour- 

 nals frequently contain many references to insects attack- 

 ing the health of man ; such allusions are not noted, un- 

 less the habits or aj^pearances arc sufiiciently indicated to 

 determine the genus.* 



* The plates and bibliography prepared by INIrs. Aaron, and ac- 

 companyiiig her essay, will be found at the close of the volume. 



