dciys and were entirely free of lice. Cockerels appeared not to dust them- 

 selves and had to be treated by hand- A single dust box appeared to be 

 adequate for a pen of 30 to 50 birds. 



J. G. CONKLIN, R. L. BlICKLE, W. J. AIORSE 



New Records of Insects in New Hampshire 



Studies of the Tricoptera of Xew Hampshire, begun in 1946, have 

 yielded to date approximately 225 species, some of which are apparently 

 new to science. Collections have been made chiefly through the use of 

 light traps. 



Studies on the Tabanidae of Xew Hampshire, begun in 1952, have 

 raised the number of species known to occur in the State to 76. 



The European earwig was found in Xew Hampshire for the first 

 time in 1952, and appears to be well established in at least two localities 

 in the coastal region. 



The box elder bug was found for the first time in the State at Man- 

 chester in the spring of 1953. 



J. G. CONKLIN, R. L. BlICKLE, W. J. ^NIORSE 



OTHER ACTIVE PROJECTS 



Synergists for Insecticides 



R. L. Blickle 



Control of Apple Maggot and Certain Other Economic Insects 



J- G. CoNKLiN, R. L. Blickle 



Studies on the Ecology of the European Spruce Sawfly 



J. G. COXKLIX 



Farm Management 



(See Agricultural Economics) 



Fertilizers 



(See Agronomy) 



Floriculture 



(See Horticulture) 



Forestry 



Tree Thinning with Chemicals 



As a result of previous experiments, it has been found that trees can 

 be killed by inserting chemically treated paper tabs under the bark in the 

 cambial region. Several thousand trees have now been killed in order to 

 answer the following questions : 



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