NEUROPTERA : CLASSIFICATION. 369 



on one side, leading to the Lepidoptera, whilst, on the other 

 side, they are allied to the Orthoptera, as above noticed : 

 the Trichoptera, again, are allied to the TenthredinidcB in 

 the order Hymenoptera, which renders it impossible to place 

 these orders in a continuous series in regard to their affinities. 

 The order Neuroptera is divisible into the folloudng sec- 

 tions and families. 



1. Suhulicornes {lj?iivei\\&). Ha\dng the antennae minute 



and setiform, with not more than seven joints; 

 eyes large ; ocelli two or three ; larva? aquatic ; pupa 

 resembling the larva ; imago aerial. 



A. 0£/o%«?a(Fabricius). Wings of equal size; mandibles 

 very large ; respiration of the larva anal. Genus 

 hibellula (Linnaeus). 



B. Anisoptera (Leach). Posterior wings small ; man- 

 dibles rudimental ; respiration of the larvae by means 

 of lateral pseudo-tracheae. Genus, Ephemera (Lin- 

 neus). 



2. Filicornes (Latreille, PlanipenneSi R^gne Animal). An- 



tennae long, filiform, setaceous, or clavate, much 

 longer than the head, multi- articulate; eyes moderate; 

 ocelli sometimes wanting ; larvae generally terrestrial. 



A. Tarsi five-jointed. Linnaean genera, Panorpa, 

 Myrmeleon, Hemerobius. 



B. Tarsi four-jointed. Linnaean genera, Raphidia, 

 Termes. 



C. Tarsi two- or three-jointed. Termes, Psocus (La- 

 treille). 



D. Tarsi three-jointed. Genus, Perla (Geofiroy) — 

 each of which genera constitutes the type of a modern 

 natural family. 



ORDER VII. — TRICHOPTERA (Kirby). 



This order comprises the Linnean genus Phryganecs, 

 having the mouth of an obsolete character, the mandibles 



