12 -  " INSEROR A. 
veral of them are nocturnal. Their crop frequently forms a lateral 
pouch. Their pylorus has but two thick cxeca. Their biliary vessels 
are inserted into the intestine by a common trunk. 
They form four subgenera. 
Grvyiio-Tarpa, Lat. 
Where the tibie and tarsi of the two anterior legs are wide, flat 
and dentated, resembling hands or are adapted for digging. ‘The 
other tarsi are of the ordinary form, and terminated by two hooks; the 
antennz are more slender at the end, elongated and multiarticulated. 
G. vulgaris: Gryllus gryllo-talpa, L.; Res., Insect., Il, Gryll., 
xiv, xv. Length one inch and a half; brown above, reddish- 
yellow beneath; anterior tibiz with four teeth; wings double the 
length of the elytra. This species is but too well known by the 
mischief it effects in gardens and cultivated grounds. It lives 
. in the earth, where its two anterior legs, which act like a saw 
and shovel, or like those of a Mole, open a passage for it. It 
cuts and separates the roots of plants, but not so much for the 
purpose of eating them as to clear its road, for it feeds, as it 
- appears,on Wormsand Insects. The cry of the male, which is 
* only heard at night, is soft and agreeable. 
In June and July, the female digs a rounded, smooth, subterra- 
mean cavity, about six inches in depth, in which she deposits 
from two to four hundred eggs; this nest, with the gallery that 
leads to it, resembles a bottle with a curved neck. ‘The young 
remain together for some time. For other details, see the ob- 
servations of M. Le Feburier, Nouv. Cours d’Agriculture(1). 
bd : 
TRIDACTYLUS, Oliv.—Xya, Illig. | 
These Insects also excavate the earth, but with the anterior legs 
only; in lieu of posterior tarsi, they are furnished with movable, 
_narrow, hooked appendages, resembling fingers. ‘The antenne are 
of equal thickness, very short, and consist of ten rounded joints. 
T. variegatus; Xya variegata, Wlig.; Charpent., Hor. Entom., 
Il, p. 84, f. 2, 5. Very small; black, with numerous spots or 
dots of a yellowish-white; a great jumper. South of France, on 
the shores of rivers(2). 
$$ eB 
(1) Lat., Gener. Crust. et Insect., III, p. 95. 
(2) Lat:, Ib: pure, T. paradoxus, Coqueb., Mlust. Icon. Insect., II, xxi, 3. 
