112 = TREE-HOPPERS. 
insect an odd appearance. The whole insect measures about one- 
third of an inch in length. 
A number of other species of tree-hoppers belonging to the 
genus Thelia are found in our orchards. All are similar in 
habits and size. TJ. umnivittata Harr., one of the more common 
kinds, is chestnut-brown in color, tawny-white in front, with a 
white stripe along the back, extending from the protuberance to 
the tip. It is sometimes found in fairly large numbers during 
July and August on the grape vines. 
The genus Telamona also furnishes a number of peculiar 
tree-hoppers common in Minnesota. Most of them are found 
upon oaks and other forest trees, where they rest singly on the 
limbs and branches, with the heads directed away from the trunk. 
As long as young these insects keep together in small groups. 
Fic. 163.—Telamona monticola Fab. Original. 
Telamona monticola Fab. (querci Fitch) sometimes swarms 
upon the branches of the Virginia creeper during June and helps 
to destroy this vine by draining its sap, as well as by puncturing 
its bark to deposit its eggs. It is shown in Fig. 103. 
Archasia galeata Fitch, (Fig. 104), is an entirely different 
looking insect, very much arched, and of an apple-green color. 
It is common in midsummer on young oaks and hickories. 
Acutalis dorsalis Fitch. (The Black-backed Tree-hopper). 
This is a small, shining, triangular insect, with a smooth 
and rounded back, of a greenish-white color, with a large black 
