142 STATES OF INSECTS. (Larva.) 
ravages have been before noticed, under the name of the 
cadelle* (Trogosita mauritanica), a pair of prolegs are 
said to be found under the anal segment; and in that of 
the bloody-nose beetle (Zimarcha tenebricosa), that seg- 
ment is bifid. ‘That of the weevil of the common water- 
hemlock (Lixus paraplecticus) exhibits a singular ano- 
maly: prolegs occupy the usual station of the true legs, 
being attached to the three segments representing the 
trunk>. ‘This insect, however, does not appear to use 
them in moving. A pair in each of the twelve segments 
of the body are found in the grub of another weevil 
(Hypera Rumicis), the nine last pair being the shortest, 
which all assist the insect in walking *. But the greatest 
number of prolegs is to be found in the Brazil sub- 
cortical larva lately mentioned. Besides the six horny 
legs of the trunk, this remarkable animal has four pro- 
legs on each of the seven intermediate abdominal seg- 
ments, and five on each side of the base of the last, 
making the whole number of prolegs, if so they may 
be called, amount to forty-four: a far greater number 
than is to be found in any larva at present known. When 
I wrote to you upon the motions of insects, I informed 
you that some larvae moved by means of legs upon their 
back “, but I was not then aware that any were furnished 
with them both on the back and the belly at the same 
time. By the kindness of Mr. Joseph Sparshall of Nor- 
wich, a very ardent and indefatigable entomologist, I am 
in possession of the larva of Rhagium fasciatum, a timber- 
feeding beetle. This animal on the ten intermediate seg- 
ments of the underside of the body, which in the centre 
* See above, Vor. I. p. 172. > De Geer v. 228. 
* Ibid. 233. « See above, Vou, II. p. 281. 
