ORTHOPTERA. G13 



a spectre or apparition,) These have the wings somewhat unde- 

 veloped or entirely absent. They eat leaves, live upon trees, 

 and present some very curious forms. Some are called walking, 

 sticks, from their resemblance to a stick. One species, found in 

 the Moluccas, is ten inches long. Phy Ilium, (Plate XV. fig. 8,) 

 is a genus that has wings which look like a leaf, whence the 

 name, which means a Walking-Leaf. One or two of these re- 

 markable insects are met with in New York and in some of the 

 Eastern States ; (4) the CRICKETS, Achetidce, (acheta, a chirper,) 

 which, although they present a general likeness to the Grass- 

 hoppers, differ from them in their habits, being entirely terres- 

 trial, and having, more or less, the power of burrowing. They 

 appear to live both upon vegetable and animal food, which they 

 search for at night. The Crickets are good runners, but do not 

 fly as well as the Grasshoppers ; (5) LOCUSTS, Locustida, (Lat. 

 locusta, a locust.) ' The abdomen of the female has a sharp, flat- 

 tened ovipositor; the males make a loud stridulation, or whiz- 

 zing, by means of their upper wings. These insects are quite 

 arboreal in their habits, and from the green color of many of 

 them, they are hardly perceptible among the foliage. They 

 sometimes appear in great numbers; (6) Grasshoppers, AcridiidcB, 

 (Gr. akris, a locust.) The female is without an ovipositor. 

 The males of these insects make their peculiar noise by rubbing 

 their hind-thighs against the wing-covers. To this family be- 

 longs the KATYDID, Platyphyllum, (Gr. broad -leaf,) concavum, 

 (Lat. concave or hollow,) ranked among the Grasshoppers. 

 This singular insect is of a grass-green color, and derives its 

 name from the notes which it sends forth. It reaches its perfect 

 state in September, depositing its row of e^gs upon the twigs of 

 the trees in which it dwells. (See Plate XV. 9, and explana- 

 tions.) 



This order has been divided into four sections, founded on differ- 

 ences of habit arising from the peculiar construction of the 

 organs of locomotion, (Plate XV. figs. 5, 6, 7, 8, and 9.) (1) 

 The Runners, (Orthoptera cursoria;) (2) the Graspers, (Orthop- 

 tera raptoria ;) (3) the Walkers, (Orthoptera ambulatoria;) (4) 

 the Jumpers, (Orthoptera saltatoria.) The RUNNERS include the 

 Cockroaches ; the GRASPERS, the Praying Insects ; the WALKERS, 

 the Walking Sticks, &c. ; the JUMPERS, the Grasshoppers and 

 Locusts. 



