TREE-HOPPERS. 1S 
spot on its back, from the anterior corners of which a black line 
runs towards each eye. The upper margin of the head, and the 
breast, are also black. The insect is small, the female not meas- 
uring more than one-fifth of an inch in length, while the male 
is still smaller. 
This insect is frequently found in large numbers on the 
grape-vine, and may cause some damage. It is illustrated in 
Fig. 105. 
Enchenopa binotata Say. (Ihe Two-spotted Tree-hopper). 
This is still another strange form, which occurs upon a 
variety of trees, shrubs, and herbaceous plants, but prefers the 
Water-ash, (Ptelea trifoliata). It sometimes punctures the ten- 
der stems of the grape, and causes them to wilt and turn brown. 
It is an odd-looking brown insect with a remarkable prolonga- 
yous ue 
= 
Fic. 104.—Archasia galeata Fitch. Fic. 105.—Acutalis dorsalis Fitch. 
Original. Original. 
tion in front, like the beak of a bird; two yellowish spots on the 
edge of the back give it the above name. Being gregarious, both 
adult and immature forms are clustered together, usually in long 
rows on the branches of their food plants. If disturbed they 
all slip to the opposite side, and readily perform this manouevre 
a number of times, apparently not willing to escape by flight or 
by leaps. Wherever they occur ants are certain to attend to 
them, for the selfish purpose of obtaining the honey-dew per- 
pared by their “cattle.” This species deposit eggs in frothy 
masses, which are white and waxy and remain on the plants for 
