DERMAPTERA AND ORTHOPTERA. 3845 
slender form, with long, many-jointed antenne, and two 
long, slender, jointed caudal ap- 
pendages. It lives under stones, 
and C. Cookei lives in Mammoth 
Cave. 
Order 2. Dermaptera. — The 
earwigs (Forficula) have a flat 
Ws( 
Fig. 318.—A Poduran (Tomocerus) and its scales. Much enlarged. 
body, ending in a forceps; while the < 
fore-wings are small, the large hind- * 
wings being folded under them. 
Order 3. Orthoptera®—The insects 
of this group, so called from the 
straight-edged fore-wings of the grass- 
hoppers, locusts, crickets, etc., are 
characterized by their net- veined 
wings and incomplete metamorphosis. 
Organs of hearing may be situated 
either on the fore-legs, as in the green 
grasshoppers, katydids, or at the base 
of the abdomen, as in the locusts. 
Most Orthoptera have a large ovi- 
positor, by which they burrow in the 
earth or into soft wood, and deposit 
their eggs singly or in masses. Mantis 
(Fig. 320) lays its eggs in a cocoon- Fig. 319—campodea. a, 
like mass. mandibles; b, maxilla. 
Many Orthoptera, as the crickets, green grasshoppers, 
* See Reports 1-3 of U. 8. Entomological Commission, with plates. 
