432 BOAED OF AGRICULTURE. 



The sense of hearing is possessed by nearly if not all the 

 Orthoptera. The ears or auditory sacs in grasshoppers are situ- 

 ated on the sides of the first segment of the abdomen. Fig. 1. 



SYNOPSIS OF THE FAMILIES. 



The New England Orthoptera may be separated into families by 

 means of the following table, in which each figure on the right 

 leads to the same one on the left : — 



, /Hind legs longest; hind femora thickened; (jumpers) . . .4. 



I Legs of nearly equal lengtli ; hind femora not thickened (runners), 2. 

 2 / Abdomen with a forceps-like appendage at the end, FoRFicuLiDiE. 



I Abdomen without a forceps at the end 3. 



„ / Body oval and flattened Blattid^. 



I Body long and slender PhasmidzE. 



. j Antennge shorter than the body Acridid^e. 



I Antennae longer than the body 5. 



- f Wing covers flat above, but bent abruptly down at the sides, Gryllid^. 

 * I Wing covers sloping down on the sides .... Locustid^. 



Family GRYLLID^. 

 Crickets. 



Body somewhat cylindrical. Head large and free. Antennae 

 long, slender, tapering and many jointed. Eyes elliptical, and 

 ocelli present. Labrum nearly circular, and maxillary palpi with the 

 last joint enlarged at the end (except in Nemohius). Wing covers 

 in the male with a stridulating organ. Wings folded lengthwise, 

 their pointed ends sometimes extending beyond the wing covers. 

 Wings and wing covers often shortened, or wholly wanting. Or- 

 gans of hearing, when present, situated on the fore tibise. Tarsi 

 three-jointed, without pads between the claws. They stridulate or 

 make their chirping noise by rubbing the wing covers together. 



The Genera of the Gryllidae may be separated by the following 

 table : — 



J / Fore tibise broad 2. 



I Fore tibiaj slender 3. 



2 / Length more than one-third of an inch . . . Oryllotalpa. 



I Length less than one-third of an inch .... Tridactylus. 



g r Hind thighs slender CEcanthus. 



\ Hind thighs stout 4. 



'Last joint of maxillary palpi nearly the same length as the 



one preceding Chryllus. 



Last joint of maxillary palpi twice as long as the one pre- 

 ceding Nemobius. 



