SYSTEM OF INSECTS. 387 



Wings covered by Hemelytra or Tegmina a . 

 Tarsi mostly trimerous, rarely dimerous or 

 monomerous b . 



8. TRICHOPTERA c Kirby (Synistata F. Ncuroptera 

 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 d : 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 protJiorax in the PerlidcE, and of the 

 collar in the Trichoptera, affords no slight presumptive 

 evidence that they belong to different Orders. Another 

 circumstance that weighs much with me is, that the type 



a VOL. III. p. 611. 604. * Ibid. p. 684. 



c From g*|, T^WS, hair. Mr. MacLeay, thinking it indispu- 

 table that the Pcrlidcs 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 Perlid<s 

 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. III. p. 546. 



2 c 2 



