SPITTLE-INSECTS OR FROG-HOPPERS, ala} 
near the tip, a black dot is frequently found. One form is shown 
in Fig. 115 with expanded wings. It is so protean in coloration 
that we may find the same insect plain black, red, or even nearly 
uniform yellow. 
Another species produces little accumulations of bubbly 
fluid in a bunch of pine needles, where it has resorted to for food. 
If we investigate we find the insect a small, shining, broad-oval 
tree-hopper, black in color, with a pale yellow head marked with 
a black band at the front margin. The thorax is sculptured with 
fine transverse lines, and with a pale yellow band anteriorly; the 
wing-covers possess a band with hyaline margin on the outer side, 
interrupted with black near the middle; a shining black dot oc- 
curs near the tip; underside and legs are pale yellow. The larva 
is shown in Fig. 116. It is C. pimi Fitch. 
Fic, 117—Ptyelus lineatus Linn. After Lintner, 
Several other species occur, but are not often numerous 
enough to cause serious damage. 
Ptyelus lineatus Linn. (The Lined Spittle-hopper). 
This is a common species in low and damp meadows, and in 
some cases, when exceptionally numerous, is apt to catise con- 
siderable anxiety to farmers. The insect, of which an outline is 
given in Fig. 117, produces a large mass of frothy material 
- fastened to stems and blades of grass, inside of which the imma- 
ture stages may be found. The adult is found late in June, and 
may be recognized by a narrow brown double streak on the head 
and prothorax, and by a slender line of the same color near the 
costal margin of the wing-covers; the margin itself is white. 
