STATES OF INSECTS. (Larva.) 109 
Thus the larvee of the common earwig have at first only 
eight, and subsequently nine joints to their antenne, 
whereas the perfect insect has fourteen; and the forceps 
is quite different, resembling rather two straight styles 
than what its name implies. In those also of many bugs 
(Coreus marginatus, &c.), the joints of the antennz are 
of a shape dissimilar to that which obtains in the perfect 
insect. In that of the common water-scorpion, the anal 
air-tube, which is so long in the imago, is scarcely yisi- 
ble’. In the Cicada tribe, so celebrated for their song, 
neither the larva nor the imago have the enormous thigh 
armed below with strong teeth, the tibia terminating in 
a fixed incurved claw, probably for the purpose of dig- 
ging the holes into which they retire till they disclose 
the fly, which distinguish the pupze of some species, and 
is particularly conspicuous in one commonly brought 
from China‘. These often exhibit also other minor dif- 
ferences. 
II. In treating of the second great division of larve, 
those that are wholly unlike the parent insect,—which 
includes, with few exceptions‘, the whole of the Linnean 
* De Geer iii. 549. The figure of the forceps in De Geer (Ibid. 
.xxv.f. 21) is not quite correct. The styles do not taper toa point, 
but are filiform and acute. 
» Compare De Geer iii. ¢. xvill. f 2 and 12. g. 
© See above, Vot. II. p. 401. 
4Prare XVI. Fic. 4. c, Reaum. v. ¢. xix. f. 16. De Geer wi supr. 
t. xxxii. f. 26 According to Reaumur, the larva as well as the pupa 
of Chermes Ficus has wing-cases (iii. 353). 
© These are in the female sex of some Coleoptera, as Lampyris, &c. 
which retain in the perfect state nearly the same form which they 
had when larve. The larvee of some Staphylini are not very dissi- 
milar in form to the perfect insect. 
