REPORT OF THE STATE ENTOMOLOGIST 1903 147 



be attempted only by those fully conversant with the nature of 

 the materials with which they are dealing. 



Shade tree and forest insects 

 Elm leaf beetle (Galerucella luteola Mull.). This 

 species has won for itself a very bad reputation in the Hudson 

 river valley on account of its extensive injuries to elms, parti- 

 cularly the European species. It is still extending the area of 

 its operation. Last year it was detected in a limited portion of 

 Saratoga Springs, and this season we were sorry to observe that 

 it had spread over practically the entire village and would have 

 caused material injury to the shade trees had it not been for 

 the systematic and continued spraying conducted by the village 

 authorities. An examination July 16 showed that the grubs were 

 full grown in that locality and that many had pupated. We 

 are inclined to believe that the second brood, if any, would be 

 very limited in that section. This species has also been re- 

 ported as present in very large numbers at Schuylerville, only 

 a short distance from Saratoga Springs. It has become estab- 

 lished over a considerable portion of Schenectady, where it is 

 causing considerable injury and is likely to inflict more in the 

 next year or two unless adequate measures are taken for its 

 suppression. This insect as noted in Museum bulletin 64, has 

 obtained a foothold at Ithaca N. Y. and we are in hopes that it 

 will not be allowed to inflict serious injury on the beautiful 

 trees of that city as it has on those of some others in the State. 

 A detailed account of this species appears in Museum bulletin 57. 

 ' White marked tussock moth (Notolophus leucostigma 

 Abb. & Sin.). This common enemy of shade trees annually at- 

 tracts more or less attention on account of its ravages in dif- 

 ferent cities of the State, in spite of the fact that it is a com- 

 paratively easy one to control, not only on account of its eggs 

 being deposited in conspicuous masses which may readily be 

 removed from trees, but also because it is easily destroyed with 

 arsenical poisons. In our preceding report we chronicled the 

 abundance of this insect in Buffalo, and the present season has 



