Jim 
TREE-HOPPERS. 107 
minding one of the horns of a bull or buffalo, hence the above 
name. The body is three-sided in form, and is furnished with 
a sharp pointed beak, with which it punctures the bark and sucks 
the sap from the trees. 
It is common on apple and many other trees from July 
until late in autumn. The eggs are laid in slits on the bark, as 
shown in the excellent illustration kindly loaned by the Division 
of Entomology, Department of Agriculture. 
Fic. 100.—Ceresa bubalus Fab. a, female; b,enlargement of anterior foot of same; 
c, do. of antenna; d, do. of wing; e, last ventral segment of female; f, ventral 
view of tip of abdomen of female, showing terminal segments and ovipositor; 
g, do. lateral view; h, penultimate ventral segment of male; i, ventral view of 
tip of abdomen of male—all enlarged. After Marlatt, Div. of Entomology, 
Dep. of Agriculture. 
The young, which hatch in spring, are very different from 
the adult insects, being furnished with a pair of long spines on 
each segment. They hatch from eggs deposited during the 
previous season. Mr. Marlatt describes their habits and life-his- 
tory in Insect Life: 
“The adult insect chooses as a nidus for its eggs the twigs, 
preferably those of two or three years’ growth, of various trees, 
particularly the apple, willow, cottonwood, maple, etc.; confines 
itself in general to the upper surface of the twigs, and works 
more abundantly on the south side of the tree than on the north, 
