8 : Report oF THE ENTOMOLOGISTS. 
DESCRIPTION OF PLATES. 
Plate XX.— Area over which the caterpillars were most de- 
structive in New York State durmg 1899. 
Plate XXI.—1. Egg mases, natural size. 2. Caterpillars at 
rest during the heat of the day. 3. Cocoon between two elm leaves, 
natural size. (Original.) 
Plate XXII.— 1. Nest of apple-tree tent-caterpillars containing 
both species. 2. Showing principal difference in markings be- 
tween the two species. The one on the left is the apple-tree tent- 
caterpillar, all about two-thirds grown. Natural size. (Orig- 
anal. ) 
Plate XXIII.— Young caterpillars congregated upon a small 
basswood branch. (Original.) 
Plate XXIV.— Caterpillars congregated upon trunk of plum 
tree preparing for last molt. (Original.) 
Plate XX V.— Furst two rows male and female moths of Clisio- 
campa, disstria Hubn, showing markings and variation im size. 
Third row, C. disstria var. sylvatica Harr; the two on the left are 
males and the third a female. Fourth row, C. disstria var. thoraci- 
coides, Neumoegen and Dyar; all males. Fifth row shows grada- 
tion from light form with two narrow dark lines across each fore 
wing to dark form with dark band across the wings; all males. 
All natural size. (Original.) 
