TRICHOPTERA. — PHRYGANEID. rat 
the structure of the legs, cox, calcaria, and mandibles, as noticed 
by Kirby, and, indeed, the general rudimental form of the mouth 
being similar; and, what is more important, the internal structure of 
the larvee, as noticed by De Geer, agrees with that of the Lepidopterous 
larvee rather than with the Neuroptera. There are many Tineide, the 
larvee of which reside in cases somewhat similar to those of the Phry- 
ganee, whilst the long-horned Japan moths (Adela) seem to present 
a near relation to the Mystacide of Latreille (Leptoceri Leach). Mr. 
Newman, (Sphinx Vespiformis, table opp. p. 21.), has even introduced 
the Lepidopterous genus Psyche into the order Neuroptera, in which 
he also includes the Trichoptera. 
Until very recently, but little attention had been paid to these insects. 
Dr. Leach, indeed, studied them carefully, and announced a distinct 
work upon the subject, but which he never completed. Subsequently, 
Mr. Curtis published the descriptions of various species in the Philo- 
sophical Magazine (new ser. Feb., March, 1834:), but the most valuable 
work upon the group is that by M. Pictet of Geneva, upon the Phry- 
ganee of Switzerland. In this. admirable memoir, the natural habits, 
anatomical and physiological characters, transformations and specific 
differences, of a great number of species have been recorded, and 
which, from a consideration of their characters, both in the preparatory 
and perfect states, he is induced to arrange into seven genera alone. 
Whilst the entire number of species collected from various sources 
by Olivier (Eineycl. Méth., tom. vi.) amounted only to 77, M. Pictet 
detected, in Switzerland, nearly 120 species, of which he had noticed 
the preparatory states of not fewer than 52, whereas seven only 
had been previously observed in their earlier stages by De Geer, &c., 
as above mentioned. It is to be regretted that the figures of the 
species in the imago state, are, in the majority of cases, completely 
unrecognisable, whilst the peculiarities in the veinings of the wings 
are too much overlooked. Shortly afterwards, Mr. Stephens described 
nearly 190 British species in his J//ustrations, which he divided into 
eight families, corresponding with seven of Pictet’s genera, to which 
he added another anomalous family, Acentropidz, which, in my opi- 
nion, belongs to the order Lepidoptera. The other families, Hydro- 
ptilide, Rhacophilide, Hydropsychide, Sericostomide, Psychomide, 
Leptoceride (Mystacida, Zaér.), and Phryganidz; he divided into 
numerous genera, founded, like those of Mr. Curtis, established in the 
Philosophical Magazine, upon the neuration of the wings, and the 
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