F 
ORTHOPTERA. 157 
and eaten in Barbary as above described. The natives of Sene- 
gal dry another, the body of which is yellow, spotted with black ; 
they then, as I have been told by M. Savigny, reduce it to 
powder, and employ it as flour. It is figured by Shaw and De- 
non. These two species and several others have a comical pro- 
jection of the praesternum, and compose my genus AcRYDIUM, 
properly so called. Of those which do not present this charac- 
ter, but have likewise filiform antennze, some are furnished with 
wings and elytra in both sexes. They belong to the genus which 
I have named (Eprvopa. 
Of this number are the two following Acrydia of authors, 
Gryllus stridulus, L.; Rees., Ib., XXI., 1, 23. Deep brown or 
blackish; thorax raised intoa carina; wings red, with the ex- 
tremity black. 
Gryllus cerulescens, L.; Roes., Ib. XXI, 4. Wings blue, some- 
what tinged with green, and marked with a black band *. 
In other Acrydia, also winged, and with filiform antenne, the su- 
perior portion of the thorax is very elevated, strongly compressed, 
and forms an acute crest, rounded and prolonged posteriorly. Certain 
species foreign to Europe are very large. The south of Europe pro- 
duces one that is smaller, the Acrydium armatum, Fisch., Entomog. 
Imp. Russ., I, Orthop., f. 1. 
In the others, G. pedester—Giorne, Charpeut.—one at least of the 
two sexes has elytra and very short wings, not at all adapted for 
flight. They form my new genus PopisMs. 
Those Acrydia in which the extremity of the antennze is inflated in 
the form of a button, either in one sex or both, constitute the genus 
Gompuocrrvs, Thunb. Such is the 
A. sibiricus; G. sibiricus, Fab.; Panz., Faun. Insect. Germ., 
XXIII, 20. Anterior tibize of the males strongly inflated and 
clavate. Found in Siberia and St. Gothard. 
In the second division of the genus of the Acrydia the preesternum 
receives a portion of the under part of the head into a cavity; the 
ligula is quadrifid; the tarsi have no pellet between their hooks. 
The antenne are composed of but thirteen or fourteen joints. 
The thorax is prolonged posteriorly in the form of a large scutel- 
lum, sometimes longer than the body, and the elytra are very small. 
These Orthoptera form the genus 
Tetrix, Lat—Acrydium +t, Fab.—partim Gry/lus-bulla, Lin, 
It consists of very small species. 
* Add G. biguttulus, Panz., Ib., XXXIII, 6 ;—G. grossus, Ib. 7 ;—G. pedesiris, 
Ib., 8; G. lineatus, Ib., 9; and see De Geer—Santerelles de passage, pl. i—xiil, 
with the exception of the figures quoted under 7yuaalis ;—Olivier—article Criquet of 
the Encyc. Méthod.; and the other authors quoted by Fabricius, under his genus 
Gryllus, such as Scheffer, Herbst., Drury, Rees., &c. See also Lat., Gen. Crust. et 
Insect., III, p. 104. These references, however, are only applicable to the genus 
Acrydium as originally established, or with the subtraction of those here indicated, 
and which may be considered simple divisions. 
+ Acrydium subulatum, Fab.; De Geer; Scheff., Icon. Insect., cliv, 9, 10, clxi, 
2, 3;—A. bipunctatum, Panz., Ib. V, 18, var. ;—A. scufellatum, De Geer, M, Insect., 
III, xxiii, 15. See also Herbst., Archiv. Insect., lii, 1—5. 
