100 MODERN CLASSIFICATION OF INSECTS. 
The cocoon in this genus is double; the outer being reticulated, 
and the inner compact and close, but paler coloured. 
Amongst the smaller species, with 22-footed larvee, which do 
not emit a fluid from the pores of the body, those of Allantus tri- 
cinctus Fab., Hart., Dahlb., which feeds upon Lonicera caprifolia 
(Tenth. vespiformis S¢. Farg., T. rustica Foure.), have been observed 
by De Geer (Mem. tom. ii. tab. 34. f.9—19.), and Hartig (tab. 5. 
f. 39.); likewise those of Allantus pulveratus Retz. (leucozonius 
Hartig, Ibid. tab. 34. f. 20—25.). 
The 22-footed larva of Allantus scrophulariz Linz. is described 
by Bouché (Naturg. Ins. p. 138.), and figured, with the details 
of the transformations of this species, by Réaumur (Mém. tom. v. 
pl.13. f.12—23.). The insect does not form a regular cocoon, but 
merely constructs an earthen cell at the foot of the Scrophularia. It is 
also figured in the Entomol. Mag. (vol.i. pl. l. f. 2, 3.), varying in 
colour very considerably after the penultimate moulting of the skin of 
the larva. An allied species, A. flavicornis AZ., luteicornis Fab., has 
been figured, in its different states, by Lyonnet (Mém. Posth. pl. 15. 
f.13—18.). The larvee of Emphytus cinctus and rufo-cinctus Klug (T. 
pavida St. arg.) are found upon the rose in the autumn. ‘The latter 
species is figured, in its different states, by De Geer (pl. 35. f£.14—18.). 
The former, when full grown, quits the leaves, and burrows into the pith 
of the stem to the depth of several inches, closing the aperture with 
its excrement, and thus forming a safe retreat for itself. (Réaumur, 
tom. v. p. 163. pl. 10. f.1, 2, 3.; Bouché, Naturg. Ins. vol.i. p. 139., 
by whom the transformations of Emphytus perla are also described, 
Ibid. p. 140.) 
The preceding species have smooth-bodied larvee. Those of Selan- 
dria ovata ZLinn., forming (with some other species) the section 
named Eriocampa by Hartig (p.279.), are 22-footed; but have the 
segments of the body clothed with small patches of white woolly 
matter, giving them still more the appearance of certain caterpillars. 
(De Geer, Mém. tom. ii. pl. 35. f..1—13.) This matter is easily rubbed 
off, and is not found after the final mouiting of the caterpillar, which is 
found upon the alder. The cocoon is double. 
The larve of Selandria bipunctata are 22-footed; but they 
are distinguished by having each segment of the body armed with 
strong spines, forked at the tip, but which do not exist after the pe- 
nultimate moult of the larva. De Geer-has represented one of these 
