ORTHOPTERA : LOCUSTARI/E. 447 



tion of each wing-cover, and formed by a thin transparent 

 membrane, stretched in a strong frame. The friction of 

 the frames of the taborets against each other, as the in- 

 sect opens and shuts its wings, produces the sounds. 



The Genus Pliylloptcra has the wing-covers shorter 

 than the wings, and not concave. 



The Oblong Leaf-winged Grasshopper, P. oblongifolia, 

 Burm., is from an inch and three quarters to three inches 

 long from the head to the tips of the wings. It is found 

 in the perfect state in autumn upon trees, and when it 

 flies makes a whizzing noise. The female lays her eggs 

 on twigs of trees and shrubs. 



The Genus P Jianeroptcra has the ovipositor curved 

 sharply upward. 



P. cnrvicauda, Serville, is about one inch and three 

 quarters from the forehead to the tips of the wings, the 

 wing-covers of uniform width, and shorter than the wings. 



The Genus ConoccpJialus has the head ending in a 

 conical projection. 



The Sword-bearer, C. cnsigcr, Harr., is from an inch 

 and three fourths to two inches long from the point of 

 the head to the tips of the wing-covers, and is pale green. 

 The piercer of the female is over an inch long. 



The Genus XipJiidium is of small size, and the oviposi- 

 tor is nearly straight. 



The Slender Meadow-Grasshopper, X.fascidtum, Ser- 

 ville, is about eight tenths of an inch long from the head 

 to the tips of the wing-covers. 



The Genus Orchclimum has the ovipositor sabre-like 

 in -form. 



ACRYDII, Latr., OR MIGRATORY LOCUST FAMILY. 

 This Family contains orthopterous insects which have a 

 large head, short and stout antennae, very strong hind 

 legs, three-jointed tarsi, and no projecting ovipositor. 

 The genera and species are very numerous. In some 



