'New York Agkicultukal Expeeiment Statioist. 295 



v^ille, Ho^vard, Allen, Alfred, Belmont, Belfast, Belvedere, Birds- 

 all, Canaseraga, West Almond, Almond, Wellsville, Independence, 

 Scio, Bath, 'Fremont and surrounding towns, Cuba and Olean, 

 Monroe County — Rochester, Brighton and vicinity in limited 

 numbers. Wayne County — Lake Side, not abundant. Ontario 

 County — Geneva and in limited numbers throughout the County. 

 Seneca County — Waterloo. Although few definite reports were 

 received from the extreme Western counties, it is not improbable 

 that the caterpillars were to be found scatteringly at least through- 

 out the western part of the State, as the conditions would be very 

 similar to those in the western New York counties where they were 

 observed. 



FOOD PLANTS. 



The early references to the food-plants of this insect indicate 

 that it was most destructive to maples, oaks and elms. Later 

 observers have recorded a large number of species of trees, shrubs 

 and vines. The most complete list of food-plants is given by 

 Weed.^^ These represent sixteen families as follows: Rosaceae, 

 apple, j)lum, hawthorn, mountain ash, cherry; Ilamamelidaceae, 

 sweet gum; Berheridaceae, barberry; Cwpuliferae, beech, birch, 

 oak; Oleaceae, ash, fringe tree; Tiliaceae, linden; Salicaceae. 

 poplar, willow; Sapindaceae, maple, horsechestnut ; Cornaceae, 

 sour gum ; Jiiglandaceae, hickory, walnut ; Saxifragaceae, cur- 

 rant ; Caprifoliaceae, diervilla, honeysuckle ; Urticaceae, elm ; 

 Legumino&ae, pea, locust; Mlagnoliac.eae, magnolia; Vitaceae, 

 woodbine. 



During the past season the caterpillars have been especially 

 destructive to sugar maples. Next to the maples they seemed to 

 prefer basswood and elm, but in some localities wore especially 

 destructive to poplar and oak. At Little Falls, N. Y., the writer 

 observed them feeding upon ironwood (Ostryia), family CupuU- 

 ferae, making a food-plant additional to the above list. 



12 X. H. Agr. Exp. Sta. Bui. G4, pp. 86-87. 



