136 LEAF-HOPPERS. 
Say may be mentioned, which measures nearly half an inch in 
length. It is marked on the head by eight yellow lines, which 
continue back upon the prothorax. The head is broad, shovel- 
shaped, and a little peaked at the very tip. It is found upon 
a number of low plants, but likes the blackberry very well, as 
shown by the large numbers visiting that plant. (Fig. 125%). 
The genus Diedrocephala contain a very large number of 
species, which are usually grass-green, pale-green, spindle-shaped 
insects, well representing the typical form of this sub-family; 
all possess a long deltoid head, as seen from above. The com- 
mon D. mollipes Say (Fig. 126) has the abdomen, legs and body 
beneath pale yellowish, the lines across the front and at the 
vertex are black, the wing-covers are edged with yellow, and the 
veins of the wing-covers are blue; those of the cells of the 
membrane are green. It measures about one-third of an inch 
in length, and is very common upon grass, mints, and low plants 
near creeks. 
The genus Tettigonia is also well represented in our state, 
and some very beautiful insects belong to it. 
On the willow and other plants in damp places we find 
another interesting species, the Aulacizes irrorata Fab., illustrated 
in Fig. 127. It is of a pale yellowish color, fresh and alive an 
ivory white, clouded with pale brown. It measures rather more 
than one-fourth of an inch, and is sometimes very common from 
July until the end of October. 
Oncometopia undata Fab. (The Waved Proconia). 
This cylindrical insect measures nearly half an inch in 
length, and is more blunt than the species mentioned in the pre- 
ceding two genera; it is also much wider across the eyes than 
it is across the thorax. Its body, head, fore part of thorax, 
scutellum, and legs are bright yellow, with circular lines of black 
on the head, thorax, and scutellum. The under side of the 
abdomen is banded, and the breast and legs are speckled with 
black. The wing-covers are bluish purple, when fresh, and 
coated with whitish powder. (Uhler). In some specimens an 
oval white patch is seen on the sides, as shown in the illustration, 
Fig. 128, which gives a view of the insect from above, from the 
side, and of one of the under wings. 
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