52 SCHOOL ENTOMOLOGY 



case with the grasshoppers. The best-known species are 

 the common Katydids, which have wings broad at the base, 

 giving them a hump-backed appearance, and are green in 

 color. They live mostly in trees, where they eat foliage. 

 Eggs of katydids are also placed on twigs. They are a 

 blue-gray in color and are a flat oval, about one-eighth 

 inch long. They are laid in a row on a twig and overlap 

 slightly. There are usually about a dozen in a row. 

 These eggs are sometimes mistaken for scale insects al- 

 though there is no real similarity. Some of the meadow- 

 grasshoppers resemble katydids, but are not hump-backed. 

 Others are brownish in color and still others have very 

 peculiar pointed heads. Most of these live on grasses and 

 weeds. Some cricket-like forms, living in cellars and caves, 

 called Cave Crickets, are yellowish-brown in color and wing- 

 less, and belong to this family. 



40. Gryllidae. Crickets are of various forms, but differ 

 from the Orthoptera so far considered in that they are 

 flattened on top and hold their wings flat on the body 

 rather than roof-like. They are usually stout bodied, but 

 not necessarily so. Many are wingless. 



The common Black Crickets found in houses, in fields, 

 under stones and rotting logs, are well known to all. The 

 Tree Crickets, slender, light in color, rather small in size, and 

 with long wings, are not so well known. Neither are the 

 Mole Crickets, curious forms with front feet resembling 

 those of a mole, which burrow in the ground after the 

 fashion of their namesake. Fig. 31 illustrates these forms 

 well enough to identify them. 



41. Blattidae. (See Page 214, Part II.) Roaches are 

 the scourge of many households and it is as household 

 pests that they are best known, although many are found 

 in the woods, in decaying logs, and under stones, where they 



