HORTICULTURAL BULLETINS. 



315 



Climbing cutworms malie their appearance in the spring as soon as the soil is 

 moderately warm. This is some time in April, and before the last of May the 

 injury of the season by them is over. They are rarely abundant more than two 

 or three weeks, and, by the time the apple trees are through blossoming, the cut- 

 worms are for the most part gone. They worli exclusively at night, and the 

 da river the night the more plentifully they appear. About eight o'clock in the 

 evening they begin traveling, and by nine o'clock their movements remind one of 

 the activities on a business street in a large city. By daylight they have again 

 disappeared, and all is quiet. They have buried themselves in the soil for the day 

 or hid under some loose rubbish that may afford them shelter from the hot sun. 



llA>^\\N^<;i3 mm 





:.\,\.^ 



'-.V'--"'^ 



Fig. 8.— The spotted-legged cntworm, Prosagrotis vetusta: m, moth, nataral size; mm, moth twice 

 natural size; I, catworm, twice natoial size (after Slingerland). 



