EXPERIMENT STATION BULLETINS. 251 



and not a live worm was found. Dead ones were seen, their remains clinging to the 

 foliage, but no sign of a live one. The dates here given may seem a little late and often 

 the trouble commences earlier, but it must be remembered that the spring of 1901 was 

 late in regard to fruit of all kinds in central Michigan. 



It often becomes necessary to spray twice in succession and sometimes three times, 

 as certain parts of the tree are almost sure to be missed the first time and these are 

 covered by the second or third, or the poison of the first application may be washed 

 off by rains and need to be replaced. 



Another remedial measure which is usually efficient is banding the tree with cotton 

 batting, or printer's ink spread on a strip of paper. Figures 14 and 15 show how the 

 band of cotton is applied. A loose band of the cotton is first placed around the tree (See 

 Fig. 14), and a string tightly tied around the tree near its lower edge. The upper 

 edge is then pulled down or turned over the lower tied part, just as a glove is 

 turned inside out in taking it off. The female moths, having no wings, are obliged to 

 crawl up the trunk of the tree in order to lay their eggs, early in the springtime just 

 after the ground thaws out, and also late in the fall. The cotton band acts as an 

 effectual barrier so long as it remains fluffy and soft, as the insects get entangled and 

 perish there. 



LIME-TFvEE INCH-WORM. 



(Hibemia tiliaria Harr.) 



Fig. 16. — Lime-tree Inch-worm. Hibemia tiliaria enlarged. Original. 



From time to time inquiries come in about yellow and brown striped measuring-worms 

 either on apple or on shade trees. In the vicinity of the Agricultural College it is no 

 uncommon thing to see apple trees with a moderate quota of these brightly colored 

 loopers levying their tax on the tree with other insects, all of which taken together 

 succeed in sensibly reducing its vitality. In the woods they are even more numerous. 

 I have found them working on maple, beech, blue beech, basswood, box-elder, elm and 

 apple; and they are said to work also on hickory and oak. 



In appearance the larva is somewhat as follows: Being a '•'measuring-worm" it 

 lacks legs except at the ends of the body. It progresses by means of the method known 

 as looping, measuring off its own length eacli time it straightens out its body. The 

 length is about 1% inches. The head is light yellowish-brown with the labrum and lower 

 part of the clypeus lighter yellow; legs dirty- white and pro-legs tinged with brown. 

 The anal plate is yellowish-brown. 



The back is dark brown with ten longitudinal black lines running the entire length 

 from the anal shield to the prothoracic shield. These lines are fairly well defined except 



