STATES OF INSECTS. (Larva.) 167 
no slight analogy between it, and indeed many other 
aquatic larvee, and the Stomapoda amongst the Crustacea. 
A remarkable instance of analogy with the Decapoda of 
the same Class is presented by the larva of Dytiscus, &c. 
which Mr. MacLeay considers as Chilopodiform, but 
which exhibits no other resemblance to Scolopendra than 
in its predaceous habits and threatening aspect. Its 
convex, compressed, tapering body, terminating in setze 
or laming, is certainly much more like that of a shrimp 
or a prawn; to which the older Entomologists thought 
it was akin ?, and after which they named it. As Mr. 
MacLeay’s object was, to take all his forms from the 
Ametabola, perhaps these larvee will best fall in with his 
Chilopodiform type ; though in the general form of their 
body they most represent a section (Lepisma) of the 
Thysanura. 
Chilognathiform forms are equally numerous in the 
Coleoptera with the preceding. The wire-worm, or larva 
of Elater Segetis, as to shape best represents the full- 
grown Julus®, and those of the Petalocera (Scarabeus L., 
Lucanus 1.) the young one. 
that of Aleyr odes Chelidonii, if Reaumur’ s figure be correct (ii. ¢. xxv. 
Ff. 18—20), is of a perfect Chilopodi iform type, the abdominal legs 
being represented by a tubercle crowned by a bristle: yet even this, 
which turns to a minute beetle (Ibid. f. 21), has some tendency to 
the Anopluriform type. 
4 @Squilla insectum a squilla pisce parum differt.”’ Mouffet, 319. 
> A remarkable difference obtains between the larva of the wire- 
worm and that of Elater undulatus. In the former, the last segment 
is longer than the preceding one, terminating in a small acute mucro 
at the apex, with a deep cavity, perhaps a spiracle, on each side, at 
the base. In the latter, this segment is shorter than the preceding 
one, forming above a nearly circular plate ; the margin of which is a 
little elevated, and armed on each side with three teeth, and at the 
apex with a pair of furcate recurved horns, and withcut any basal 
spiracle. De Geer iv. 156. t. v. f. 25. I have asimilar larva, but not 
the same species. 
