152 
THE STUDY OF INSECTS. 
the cheek beneath the eyes. Although the Fulgoridae are 
vegetable feeders, none of our species have attracted the at¬ 
tention of agriculturists. There are, however, certain exotic 
species which do great injury to crops. 
The two accompanying figures will serve to show the 
wonderful variations in form of these insects; many other 
types exist. Figure 185 represents a common species of Sco- 
lops (Sco'lops), which occurs in grassy places. In this genus 
the head is greatly prolonged, as with the exotic Candle-flies. 
Fig. 185.— Scolops. Fig. 186 .—Ormenis septen¬ 
trional is. 
Figure 186 represents Ormenis septentrionalis (Or'me-nis sep- 
ten-tri-o-na'lis), a beautiful pale-green species powdered with 
white, which feeds on wild grape-vines, drawing nourishment 
from the tender shoots and mid-ribs of the leaves during its 
young stages. 
Family CERCOPID/E (Cer-cop'i-dae). 
The Spittle Insects or Frog-hoppers . 
During the summer months one often finds upon various 
shrubs and herbs masses of white froth. In the midst of 
each of these masses there lives a young insect, a member of 
this family. In some cases as many as four or five insects 
inhabit the same mass of foam. The froth is supposed to 
consist of sap, which the insect has pumped from the plant, 
by means of its beak, and passed through its alimentary 
canal. It is asserted that these insects undergo all their 
transformations within this mass; that when one is about to 
molt for the last time, a clear space is formed about its 
body; the superficial part of the foam dries, so as to form a 
vaulted roof to a closed chamber, within which the change 
