SYSTEM OF INSECTS. 387 
Wings covered by Hemelytra or Tegmina n . 
Tarsi mostly trimerous, rarely dimerous or 
monomer ous b . 
8. Trichoptera c Kirby (Synistata F. Neuroptera 
Latr.). MM. 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' 1 : 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 
them for mastication, as the Hymenoptera, or that take 
their food by suction, this part is replaced by a mostly 
narrow collar, forming a part of the alitrunk e . The ex- 
istence then of the prothorax in the PerlidtZ, and of the 
collar in the Tric/ioptera, affords no slight presumptive 
evidence that they belong to different Orders. Another 
circumstance that weighs much with me is, that the type 
» Vol. III. p. 611—. 604—. b Ibid. p. 684—. 
c From fy%, r^xo?, hair. Mr. MacLeay, thinking it indispu- 
table that the Perlidce 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 Perlidce 
belong to the Order, and as the great body of the Trichoptera 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 -. e Vol. HI. p. 546—. 
2 c2 
