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trees any season. When very abundant they often de- 

 nude these trees badly, and will then appear upon 

 ■deciduous trees in the neighborhood, ultimately when 

 -very abundant, as they were during the summer of 1893, 

 ■occuring on most of our shade trees. No doubt they are 

 carried from tree to tree by winds, as they may often be 

 "seen suspended from the branches by their silken threads. 

 But dispersal by this means is uncertain and alow, and 

 from the fact that the worms could be found on isolated 

 ■deciduous trees last summer I incline to think they 

 -sometimes drop to the ground and creep from one tree to 

 another. Burdened as they are with their cases they are 

 not very active in migrating, and during ordinary sea- 

 sons remain pretty closely confined to evergreens. Dur- 

 ing the past summer they were found to be common at 

 Lexington on soft maple, elm, poplar, sycamore, black 

 locust, red cedar, white pine, willow and linden. They 

 occcurred throughout the State in injurious numbers. 

 Mr. E. A. Trout, of Trimble County, wrote July 26 that 

 they were stripping black locust trees of their leaves in 

 his neighborhood, while in August Mr. Denny P. Smith of 

 'Cadiz wrote that they were killing red cedars in the west- 

 ern part of the State. About the 20th of August a small 

 proportion of the sacks found on trees contain pupse, and 

 by September 5 most of the worms have changed. The 

 winged male begins to emerge about the middle of Sep- 

 tember, the first of those kept by us at the Station having 

 appeared September 16 . On the 25tli of last September 

 they were observed to be emerging everywhere in large 

 numbers, and the fully developed females were at this 

 time found in their cases. During the early part of 

 October the eggs are laid, the first being found October 

 8. By the middle of October most of the adults have 

 disappeared, 



