76 Department of Entomology. 



in the course of the preparation of this work, will appear in the Septem- 

 ber number of the Annals of the Entomological Society of America. 



Professor Slingerland had begun the preparation of a Handbook of 

 Fruit Insects ; this work is now being completed by Assistant Professor 

 Crosby and will probably be ready for publication during the present year. 



Assistant Professor MacGillivray has continued his work on a volume 

 consisting of tables for the identification of the insects of the north- 

 eastern United States. Assistant Professor Riley is still engaged with 

 a text book on Insect Morphology. 



The investigations of Assistant Professor Herrick have been as follows : 



1. A study of the Snow-white Linden Moth in which the life history 

 and habits have been ascertained in detail. Results are now in manu- 

 script form for bulletin. 



2. A study of the Mallophaga infesting domestic fowls. Each species 

 will be carefully illustrated and described and its habits given as far as 

 possible. This work will be completed early in the winter. 



3. A careful and detailed study of the habits and life history of the 

 Cabbage Aphis carried through more than a year, with observations on 

 the number of generations from the stem mothers, etc. In addition, rather 

 extensive dipping experiments of seedlings have been made to determine 

 the best method and materials for freeing from the Aphis young plants 

 that have become infested in the seed bed. Also two acres of badly 

 infested cabbages at Groton were sprayed with gratifying success, in 

 addition to many smaller trials of materials nearer home. 



4. A detailed study of the life history and habits of the Larch Case- 

 bearer has been made and is still under way. 



5. Miscellaneous work in the breeding of various pests : the Elder 

 Borer, Poplar Saw-fly, Linden Beetle, Iris Root-borer, Pickle Worm, 

 Apple Maggot, Borer in Pecans, etc. Also rather extensive spraying 

 experiments for the Onion Thrips on an acre of onions at Elmira, and 

 a trial of three brands of commercial lime-sulfur washes for scale. 



The investigations of Assistant Professor Crosby have been as follows : 



1. A study of the Joint-worms infesting grains and grasses. This is 

 a continuation of the work of previous years and is nearing completion. 



2. A study of the habits and life history of some injurious insects as a 

 basis for their successful control. These include the following: the Red 

 Bugs of the Apple, two species of sucking bugs causing serious injury 

 by stinging the fruit ; the Plum Leaf-Miner, a serious pest of the plum 

 in certain orchards. 



Investigations on the biology of aquatic organisms are being conducted 

 throughout the year at the Biological Field Station chiefly by graduate 



