The Entomological Division. 



The life-history of the bud moth (Tmetocera ocellana) has 

 been completed and published in Bulletin No. 12, together with 

 methods for its destruction. In the same bulletin were also 

 published, with illlustrations, the life-histories of spittle insects, 

 the squash bug, the pea weevil, the bean weevil, the May beetle, 

 the plum curculio, the onion maggot, the cabbage butterfly, 

 the apple-tree tent caterpillar, the forest tent caterpillar, the 

 stalk-borer, the pyramidal grape-vine caterpillar, the grape- 

 vine moth, the codling moth, the cabbage-leaf miner and the 

 gartered plume moth. 



The studies on cranberry insects have been continued during 

 the summer at the insectary, and also on the bogs of Barnstable 

 and Plymouth counties during the months of July and August. 

 The work has not been completed, but a preliminary bulletin 

 on the subject wnll soon be issued. Experiments were per- 

 formed with Paris green and London purple on cranberry vines, 

 to determine how large an amount may be used without injury 

 to the vines, and also how small an amount will prove 

 destructive to the vine worm, the results of which will appear 

 in the preliminary bulletin. 



A series of experiments was performed with Paris green on 

 ay)ple-trees, to ascertain what conditions of weather cause the 

 Paris green to aflect the foliage the most unfavorably. 



Experiments w^ere made with kerosene emulsion on red 

 spiders and plant lice on rose bushes. 



A series of experiments was made to ascertain the smallest 

 proportion of Paris green in water that would kill apple-tree 

 tent caterpillars in their different molts, and also what propor- 

 tion would prove the most successful in destroying them. 



Six Barnard moth traps were kept in the garden and orchard 

 during the season. From these the insects were taken each 

 day and determined, in order to ascertain whether the beneficial 

 efi'ect of the traps in collecting injurious insects was ofiset by 

 the number of useful insects destroyed. 



The work on the card catalogue of insects and also on the 

 biological 'collection for the insectary has been continued as 

 time and circumstances permitted. 



Much time has been given to the scientific supervision of the 

 work of destroying the gypsy moth in the eastern part of the 



