378 SYSTEM OF INSECTS. 
of head, trunk, and abdomen, might be pointed out; but 
these you will chiefly find noticed in my letters on the 
External Anatomy of Insects, where I treated of those 
parts. I shall here, therefore, only further mention the 
ovipositor also as forming a most striking distinction?. 
Der. Metamorphosis semicomplete in almost all. 
Mouth promuscidate?. 
Wings covered by Hemelytra or Tegmina*. 
Tarsi mostly trimerous, rarely dimerous or 
monomerous 4. 
8. Trichoprera® Kirby (Synistata F. Neuroptera 
Latr.). M.M. Latreille and MacLeay are of opinion 
that Semblis F. and Phryganea L. ought to be associated 
in the same group; and the latter gentleman has backed 
his opinion by some apparently cogent arguments‘ : there 
are others, however, that seem to me more cogent, for 
considering them as belonging to different Orders. Who- 
ever examines the several tribes into which Mr. Mac- 
Leay has divided the Neuroptera, will observe in all of 
them a distinct prothorax, a circumstance which they 
possess in common with those Orders that use their man- 
dibles for mastication; whereas in those that do not use 
* See above, p. 153—. > Vot. III. p. 464. 
© Ibid. p. 613—. 606—. 4 Ibid. p. 685—. 
* From Sec, terxos, hair. Mr. MacLeay, thinking it indispu- 
table that the Perlide should be included in this Order, suggests the 
propriety of changing its name, both as inapplicable, and as being 
preoccupied by a Dipterous genus. As I do not think the Perlide 
belong to the Order, and as the great body of the T’richoptera are 
distinguished by hairy upper wings, I cannot think the name impro- 
per: but to apply a name to a Genus which terminates like the deno- 
minations of Orders, I think leads to mistakes, and should not be to- 
lerated.— K. * Hor, Entomolog. 430—. 
