REPORT OF THE STATE ENTOMOLOGIST I9II I05 



or less serious injury. This insect has also been reported as 

 being abundant upon the elms of Binghamton and of Dunkirk. 

 Local observations at New Baltimore, Ravena and the vicinity 

 of Albany disclosed more or less injury by this caterpillar, 

 though most of it was restricted to branches or portions of trees. 



The gregarious habits of the caterpillar make its feeding con- 

 spicuous and therefore facilitate its early detection. It is com- 

 paratively easy to check these leaf feeders by the judicious 

 application of an arsenical poison, preferably arsenate of lead, 

 it being feasible to restrict the treatment to the infested limbs 

 and those adjacent. Limbs bearing clusters of caterpillars can 

 also be cut off and the pests crushed. Ordinarily, remedial 

 measures are not necessary. 



Elm leaf beetle (Galerucella luteola Mull.). Injuries 

 by this pest have been exceptionally severe and general on Long 

 Island and in the Hudson valley at least. The damage was so 

 general that the elms of many communities could easily be 

 recognized in midsummer at a distance of several miles because 

 of the contrast presented by the brown, dead foliage. 



The elms of Amaganset at the eastern end of Long Island 

 were very severely injured, and the same would have been 

 equally true of East Hampton had it not been for the spraying 

 earlier in the season. Even with this protection there was con- 

 siderable injury. The brown foliage of elms was a rather 

 common feature of the landscape on both sides of the Hudson 

 river from Yonkers north to Albany. Mr Henry Bird reports 

 the pest abundant at Rye. The injury to more or less isolated 

 trees in woodlands or on the edges of fields and some distance 

 from the highway was very evident during the past season. 



Many of the trees in Albany were badly eaten by the elm 

 leaf beetle, this being especially marked on Clinton avenue, 

 Lark and Hamilton streets and those adjacent to the two latter. 

 The elms of Menands and Watervliet were very seriously af- 

 fected, this being especially true in the southern portion of 

 Watervliet. Almost every tree in this section had the foliage 

 severely injured and in many instances it was completely de- 

 stroyed. The damage in Watervliet appears to have been more 

 widespread and general than has been the case for the past twelve 

 or fifteen years. Many of the elms of Green Island were 

 severely injured, though the work of the insect was not nearly 

 so general as at Watervliet. The same was true of Cohoes, 

 while Waterford had very many trees which had been seriously 



