10 BOARD OF AGRICULTURE. 
VI. Orthoptera (straight-wings). This order includes the 
grasshoppers, true locusts, katydid, crickets, cockroaches, etc. 
Fig. 14. The front wings are generally 
long and straight, somewhat 
thickened, and in the male often 
have some sort of musical ap- 
paratus, as in crickets, katydids, 
etc. The hind wings are broad, 
fan shaped, and can be folded 
up like a fan beneath the front 
wings, which when folded gen- 
erally lie lengthwise of the body, 
forming a sort of roof. 
The mandibles and maxille 
are chewing organs. The larve 
hare nearly the same form as the 
adults, but lack wings ; they have 
similar habits; the pupe are also active. Most of these 
insects, except the Mantis, are injurious to vegetation by eat- 
ing the leaves.¢ - 
VII. Neuroptera (nerve-winged). The dragon-flies, lace- 
winged flies(Figure 15), May Fig. 15. 
- flies, Lepisma (Figure 3), and 
white ants, belong to this order. 
‘The wings, when present, are 
thin, membranous, and subdivided by very numerous rods or 
nervures into small spaces, which are often squarish. The 
mandibles and maxille are chewing organs. The abdomen 
is generally long. The larve are of many forms, often 
aquatic, generally carnivorous and predacious in habits, and 
usually undergo a complete metamorphosis; the pups are 
mostly inactive. Most insects of this order, excepting the 
Figure 14.—Katydid (Cyrtophyllum concavum Say), male, natural szie. Color 
“bright green. From Packard’s Guide. 
Figure 15.—The Lace-wing Fly (Chrysopa oculata Say), natural size, with the 
eggs attached to the tips of slender pedicels. Body light green. This insect 
lays its eggs among plant-lice (Aphis), which the larve, when hatched, destroy. 
From ‘Packard’s Guide. a 
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