ORDER GRYLLOBLATTOIDEA. 



Elongate, flattened, wingless insects measuring over one inch in 

 length. Head nearly horizontal, free, eyes small, no ocelli, anten- 

 nae long and thread-like, arising from the front of the head, mandi- 

 bles strong; prothorax large, quadrate, free; legs formed for run- 

 ning, similar, coxse close together, tarsi five- jointed; cerci long, 

 filiform, eight-jointed, ovipositor long and sword-shaped. 

 (Grylloblatta.) (PI. 2, fig. 19.) GRYLLOBLATTID^ 



ORDER ORTHOPTERA. 



(ULONATA, part; SALTATORIA.) 



Small to large, jumping species usually possessing a device on the 

 wings for making a creaking sound; hind femora almost always 

 very much stouter basally, or longer, or both, than the middle 

 femora; wings of adults reposing over the abdomen, the fore wings 

 toughened, narrower and thicker than the membranous, plaited 

 hind pair; sometimes the wings vestigial or completely absent; 

 head usually vertical; ovipositor almost always free; mouthparts 

 conspicuous, mandibulate; metamorphosis gradual, the young 

 resembling the adults, but with the small wings in a reversed 

 position in the last two nymphal stages, the hind wings then 

 overlapping the fore wings. 



1. Antennae almost always shorter than the body, generally thread-like and never 



distinctly tapering, joints distinct, often flattened; ocelli three; tarsi three- 

 jointed, alike on all the legs; ovipositor short; auditory organs, if present, at 



the base of the abdomen 2 



Antennae generally longer than the body, filamentous, delicately tapering; 

 ocelli often absent; ovipositor usually long; auditory organ usually near base 

 of front tibiae 3 



2. Claws with a pad (arolium) beneath and between them; pronotum at most 



extending over only the extreme base of the abdomen (PI. 1, fig. 7); fore 

 wings generally well developed. Locusts, Grasshoppers. (Melandplus 

 [M. spretus, Rocky Mountain locust], Chortophaga, Hippiscus, Dissosteira 



\D. Carolina, Carolina locust].) (PL 1, fig. 8) ACRIDilD^ 



Claws without arolium; pronotum extending over the abdomen (PL 1, fig. 6); 

 fore wings vestigial, consisting of small scales at the base of the usually large 

 hind wings. Grouse-locusts, Pigmy locusts. (Tettix) (PL 1, figs. 10, 11.) 



TETTIGID^E 

 13 



