REPORT OF THE SOCIETY 13 



Moreover, the selection was no easy task on account of the existence of 

 a very large number of publications of first-class merit. Most of these, 

 however, were ruled out, after careful consideration, on the ground of in- 

 completeness. For example, Comstock's published works on scale insects 

 and wireworms are most valuable, as they laid a solid foundation for future 

 investigations. They cannot, however, claim monographic completeness of 

 treatment. Howard and Marlatt's San Jose Scale is most thorough in so far 

 as it goes, but the last word was not said. Much has been added to our 

 knowledge of the insect since its publication. Osborn's "Insects affecting 

 Domestic Animals" is an admirable compendium of information, but it must 

 be confessed that much investigation requires to be done before our knowl- 

 edge of these insects is complete. 



Perhaps no insect has received more attention than the Codling Moth, 

 yet it is difficult to choose a single publication dealing with this insect that 

 can be called monographic. The bulletins of Slingerland, Simpson, Ham- 

 mar, Jenne and Sanderson are comprehensive and deal very fully with the 

 life-history stages and their variations due to climatic changes. The three 

 bulletins on "Life-history Studies on the Codling Moth in Michigan" and 

 "Life-history of the Codling Moth in N.W. Pennsylvania" by A. G. Ham- 

 mar, and "The Codling Moth in the Ozarks" by E. L. Jenne are undoubtedly 

 the most complete that have yet appeared, but they are more or less localized 

 in their observations. We are still awaiting a monographic report of this 

 insect, one that will gather together all the scattered fragments of regional 

 observations and discuss comprehensively the anatomy, embryology, para- 

 sitism, hibernation, climatic and other ecological factors, and modes of 

 control. 



Within recent years excellent bulletins have appeared, but most of 

 them might properly be called "reports of progress," as they do not pre- 

 sume to deal exhaustively with all phases. Some of the most suggestive 

 of these have come from the Illinois State Experiment Station, under the 

 direction of Professor Forbes. These are: — 



Bui. 134. "Insect Pests of Clover and Alfalfa," by Folsom. 

 Buls. 130-1. "Corn Root Aphis and Corn Root Ant," by Forbes. 

 Buls. 116. 186-7. "May Beetles and White Grubs," by Forbes. 



The House Fly has claimed much attention of late years, and very full 

 information has been gathered regarding its anatomy, breeding habits, 

 feeding habits, and its relation to disease in Howard's and Hewitt's works. 

 Many data, however, are required with regard to hibernation, climatic con- 

 trol and habits before it can be said to be exhaustively treated. 



