70 e MODERN CLASSIFICATION OF INSECTS. 
of the imago, such as the folded wings, &c., which plan was also 
adopted by Lamarck. Mr. Kirby, in the 11th volume of the Zinn. 
Trans., and subsequently Leach, restricted it to the genus Phryganea 
of De Geer, of which the leading characters are given above ; whilst 
Latreille retained the family as a distinct section of the order Neu- 
roptera, under the name of Plicipennes; in this respect he has been 
followed by M. Pictet, who has substituted the name Phryganides. 
Mr. MacLeay, in the Hore Entomologice, from an erroneous idea 
relative to the larve of the Perlide, considered that family as belonging 
to the same order as the Trichoptera, the inaccuracy of which has 
been commented upon in a preceding page; but Mr. MacLeay pro- 
ceeded on this false foundation to show that, as the organisation of the 
perfect Perlidae and Phryganez is so variable, (whilst he considered the 
larvee to be all cylindrical, with membranaceous feet, and to undergo 
the metamorphosis obtecta* Linn.,) it would be difficult to exclude the 
Tenthredinide from the order (Hore Entomol., p. 431.), which he 
accordingly divided into three stirpes, Perlina, Phryganina, and Ten- 
thredina.t The introduction of the Perlide into the order, which 
was Mr. MacLeay’s ground for the admission of the Tenthredinide, 
having been already shown to be untenable, will render it unneces- 
sary for me to enter into any arguments against reinstating the Ten- 
thredinide in the order Hymenoptera, especially as Mr. Kirby has 
completely answered Mr. MacLeay’s objections in the Introduction to 
Entomology, vol. iv. p. 374. That there may be a slight relation 
between the Trichoptera and Tenthredinide { may be admitted, but 
it appears to me that the genus Phryganea forms the connecting link 
between the Neuroptera and Lepidoptera. That it is closely related 
to the Neuroptera will be evident, because Latreille, Pictet, and others 
still consider;Phryganea as Neuropterous, being especially related to the 
genus Sialis, which seems to form the passage between the Phryganez 
and Perlidz; but not only are the veins of the wings arranged upon 
the plan of the Lepidopterous wings, the general habit of the insects, 
* Neither the Perlide, Phryganeide, nor Tenthredinide undergo obtected meta- 
morphosis, as assumed by Mr. Macleay. 
+ Mr. MacLeay (Hore Ent., p. 432.) mentioned a terrestrial larva, inhabiting a 
case, found in Java by Dr. Horsfield, and which he considered to be that of a ter- 
restrial Trichopterous insect. It is, however, clearly the larva of a Lepidopterous 
nsect, allied to Oiketicus of Guilding and to the Sacktragers of the Germans 
(Psyche, &c.). 
¢ Latreille introduces the Phryganex between the Neuroptera and Hymeno- 
ptera. 
