ENTOMOLOGY. 



I. Federal Experiment Station Work. 



The study of insect enemies of timothy, which we begun last year, 

 has been actively prosecuted this year. Most of the time has been 

 spent in studying the joint-worms which infest wheat, timothy and 

 other grasses. The life-history of the joint-worm of timothy has 

 been well worked out. Much has been done on the parasites which 

 infest these joint- worms, and some very interesting facts have been 

 ascertained regarding the inter-relation of these parasites and their 

 hosts. Excursions have been made into different parts of the State 

 to collect the host plants of these insects, and extensive breeding 

 experiments have been performed, which have resulted in much 

 valuable information. 



Some observations have been made on other insect enemies of 

 timothy, and considerable progress has been made towards a mono- 

 graphic study of the literature of timothy insects. 



Another interesting piece of work, which is being done under the 

 auspices of the Federal Fund of this station, is a study of a new 

 insect which we have found to be very common in the seeds of many 

 kinds of apples. No apple-seed-infesting insect seems to have been 

 heretofore observed in this country. The adult insect has been 

 reared and found to belong to a group, the members of which have 

 been supposed to be parasitic on other insects. Another season's 

 observations and breeding experiments are necessary to complete 

 our knowledge of this interesting new apple pest. 



II. Extension Experiment Work. 



Under the auspices of the State funds, considerable work has 

 been done by this division of the station along the line of co-opera- 

 tive experiments with farmers, and also the study of some minor 

 insect pests. 



We are studying an interesting insect, which mines the leaves of 

 the Sour Gum or Pepperidge tree. Good pictures of the work and 

 early stages have been secured, but we have thus far failed to 

 breed the adult insect. The life-history of the Tingid bug, which is 

 often injurious to rhododendrons, has been worked out and a prac- 

 ticable remedy found. Two other insects, whose caterpillars mine 

 the leaves of arbor vitac and hemlock, have also been under super- 

 vision, but another season's work is required to clear up some 

 points in their life-histories. 



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