ORTHOPTERA. 15 
Those species in which the males produce their stridulation only 
by rubbing their thighs against the elytra or wings, and whose fe- 
males are destitute of a salient ovipositor, are distinguished from 
the preceding ones by their antenne, which are sometimes filiform 
and cylindrical, and sometimes ensiform or clavate, and always at 
least as long as the head and thorax; their elytra and wings are al- 
ways tectiform or inclined, and their tarsi are triarticulated. They 
have five or six ceca, and their biliary vessels, as in most of the 
order, are directly inserted into the intestine. 
The ligula of the greater number is merely bipartite. They all 
have three distinct simple eyes, the labrum emarginated, the man- 
dibles multidentated, and the abdomen conical and compressed late- 
rally. They leap better than the preceding ones, fly higher and 
longer, and feed voraciously on vegetables. They may be comprised 
in one single genus, that of 
Acrypium, Geoff. 
Which may be subdivided as follows: 
Some have the mouth exposed, the ligula bifid, and-a membranous 
pellet between the terminal hooks of the tarsi. Such are 
* Pwrumora, Thunb.—partim Gryllus bulla, Lin. 
+ 
Distinguished from the following by the posterior legs, which are 
shorter, than the body, and less adapted for leaping, and by their 
vesicular abdomen, at least in one of the sexes. 
Their antennz are filiform. 
They are only found in the most southern part of Africa(1). 
Proscorta, Kliig. 
Apterous Insects, with a long and cylindrical body; their head, 
Those Grylli in which the front is elevated in the manner of a pyramid or cone 
haye’ been generically distinguished by Thunberg under the name of Conocz- 
pHatus, Finally, the Scarnurz of M. Kirby—Lin. Trans.; Encyclop. Méthod.— 
or my Pennicornes, resemble ordinary Grylli, but their antenne are bearded infe- 
riorly, and their oviduct is scaphoid. 
For other genera, see Toussaint Charpentier, ‘and the Mem. of the Imper. Acad. 
of St Petersburg, where Thunberg has established new generic sections. 
(1) Pneumora sexguttata, Thunb., Act. Suec., 1775, vii, 3; Gryllus inanis, 
Fab.;—P. immaculata, Thunb., Ib., vii, 1;—G. papillosus, Fab.;—P. maculata, 
Thunb., Ib., vii, 2;—G. vartolosus, Fab. 
