rf 
f 
ncaa ee a a ea i ae i 
100 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
usually distinctly marked with yellow and black chevron-shaped bars 
on the sides of the thighs. It is seldom found farther north than the 
southern counties of North Dakota and Minnesota and is most injurious 
in the Great Plains, Mississippi Valley, and Southern States. 
The two-striped grasshopper is about 114 inches long and slightly 
more robust and shorter than the preceding species. It is greenish 
yellow underneath, with two yellow stripes down its otherwise brown 
back from its head to the end of its wings. It is found from southern 
Canada to Mexico, except in the South Atlantic States. 
The red-legged grasshopper is about 34 inch long, reddish brown 
above and yellow beneath, with its hind eas tinged “with bright red, 
and its hind wings colorless. It occurs throughout the United States. 
The clear- winged grasshopper is about 1 inch long, yellow to 
brown, with clear or pellucid hind wings and the front wings distinctly 
blotched with large brown spots. It occurs in all the Northern States 
but is seldom found very far south. For control measures found suc- 
cessful against this and the other ground-feeding species, see Parker 
(329) and page 33 of this publication. 
Dendrotettix quercus Pack. is strictly a forest insect, feeding on 
the foliage of oak. It is about 1 inch long, yellow or greenish yellow 
varied with piceous, and has a large head. Some individuals are low- 
winged and others short- winged. It was first discovered in north- 
eastern Texas and is now known to occur as far north as Nebr: aska, 
southern Iowa, and Illinois. It also occurs in New Jersey and Long 
Island. The species appears in waves of devastating local abundance 
separated by periods of virtually complete absence. “The egg pods are 
deposited in the soil in late summer and fall. The nymphs hatch 
from the eggs in the spring and climb the trees to feed. They are 
very active but shy im all stages of growth. The adult stage is reached 
during the period from June to September. 
Famity TETTIGONIIDAE 
The Katydids, Long-Horned Grasshoppers, Meadow Grasshoppers, 
Cave Crickets, Camel Crickets 
The Tettigoniidae are mostly large insects with long, slender, taper- 
ing many- jointed antennae which usually extend backward far beyond 
the tip of the abdomen. The tarsi are four-jointed. The ocelli are 
nearly always absent. The ovipositor is sword- or sickle-shaped. They 
vary a great deal in their habits and appearance (fig. 16). 
The arboreal forms are usually long-winged and green, matching 
the foliage on which they feed. They seldom become numerous 
enough to be pests. The eggs of the arboreal forms are elongate-oval, 
flat, white, or brownish and laid overlapping end to end in rows on 
the leaves or twigs or inserted in the edges of the leaves. Most of the 
species of this family overwinter in the egg stage, and when they 
hatch in the spring ‘the young resemble the adults except for the 
absence of wings. The stridulation, or music, of the males is well 
known. The familiar “katydid” sound is produced by rubbing a row of 
minute filelike teeth on the under side of the upper tegmen over a vein 
on the upper surface of the other wing. 
The grass-inhabiting forms are often large, wingless, and destruce- 
