168 STATES OF INSECTS. (Larva.) 
The most abundant of all forms in this order, is, I 
think, the Vermzform, upon which I have nothing further 
to remark. 
With regard to Crustaceous forms in Coleoptera, be- 
sides the Decapodiform just noticed, I possess two speci- 
mens of larvee of Silphide which seem to exhibit a con- 
_ siderable analogy with the Jsopodous Crustacea, one rather 
convex and the other flatter, so as to give the idea of an 
Armadillo and of an Oniscus. 
Strepsiptera. Larva Vermiform. 
Dermaptera. Larva Thysanuriform. Type Podura or 
Sminthurus. 
Orthoptera. Mr. MacLeay considers the larve of this 
order as primarily Zhysanuriform*, though he allows 
the resemblance between them and Amphipoda to be par- 
ticularly striking >. For my own part, their prototypes 
appear to me to be in the Crustacea, and their analogical 
relations to the Thysanura much more distant. I trust 
this will appear to you the reverse of dubious in a pro- 
gress through the crustaceous orders. I begin with the 
Isopoda. ‘Take the larva of a Blatta, and place it be- 
tween a Lepisma, or Machilis, and an Oniscus, or Por- 
cellio; you will find that in shape and width, and the form 
of its anal styles, it resembles the latter much more than 
it does the former, with which it possesses scarcely any 
character in common, except its multiarticulate antenne. 
It is remarkable, that amongst the Blattina we meet with 
species that represent both the Onzsczde and Armadillo 
or Glomeris*, the latter being more convex than the 
former. In their habits they certainly agree with 
Lepisma ; and Dumeril, who thought the latter and Po- 
* Hor. Entomolog. 397. b Thid. 399. 
* Thid. 438, Note *. 
