STATES OF INSECTS. 109 



hibit slighter discrepancies in the proportion of some of 

 their parts, but without affecting the general resemblance. 

 Thus the larvae of the common ear-wig have at first only 

 eight, and subsequently nine joints to their antennae, 

 whereas the perfect insect Yisls fourteen a ; and the forceps 

 is quite different, resembling rather two straight styles 

 than what its name implies. In those also of many bugs 

 (Coreus marginatus F. &c), the joints of the antennas 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 visi- 

 ble b . In the Cicada tribe, so celebrated for their song c , 

 neither the larva nor the imago have the enormous thigh 

 armed below with strong teeth, the tibiae 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 pupae of some species, and is 

 particularly conspicuous in one commonly brought from 

 China d . These often exhibit also other minor differences. 



II. In treating of the second great division of larvae, 

 those that are wholly unlike the parent insect, — which 

 includes, with few exceptions e , the whole of the Linnean 



a De Geer iii. 549. The figure of the forceps in De Geer (Ibid. 

 L xxv. f. 21) is not quite correct. The styles do not taper to a point, 

 but are filiform and acute. 



b Compare De Geer iii. t. xviii./. 2 and 13. q. 



c See above, Vol. II. p. 401. 



d Plate XVI. Fig. 4. c. Reaum. v. t.nix.f. 16. De Geer ubisupr. 

 t. xxxii.y. 26. According to Reaumur, the larva as well as the pupa 

 of Chermes Ficm has wing-cases (iii. 353). 



e 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 larvae. The larvae of some Staphylini are not very dissi- 

 milar in form to the perfect insect. 



