138 MANDIBULATA — NEUROPTERA. 



greenish hues, anterior elongate and narrowish, posterior wider, with the 

 hinder margin excised : abdomen slender, its apex furnished with two jointed 

 setae : legs simple. 



Although there is not much structural dissimilarity between the 

 insects of this and of the two foregoing genera, yet, from their great 

 diversity of habit, I perfectly coincide with Mr. Newman in removing 

 them from Perla : the sexes are alike, and all the species are more or 

 less distinguished by having the wings tinted with yellowish- or 

 ochreous-green ; the nervures are fewer in number, and much less 

 distinct than in Perla or Isogenus ; the insects are of a more slender 

 form, &c. 



A. Anterior wings with four discoidal areolets, the third and fourth with 

 numerous transverse nervures. 



Sp. 1. fuscipennis. Ochraceo-viridis, abdominis dorso oculisque nigris, alis sub- 

 fuscescentibus, veuis saturatioribus, (Long. corp. 4§ lin. ; Exp. Alar. 1 unc. 

 i— 1 lin.) 

 Pe. fuscipennis. Curtis? — Steph, Catal. 315. No. 3539. 



Ochreous-green : eyes and ocelli black ; sides of the collar somewhat dusky ; 

 abdomen above black, its sides and beneath ochreous-green ; legs yellowish- 

 green ; wings slightly fuscescent, with a greenish tinge, the nervures 

 darker. 



Found in the north of England and in Scotland, in June. 



Sp.2. lateralis. Ochraceo-viridis, oculis atris, thoracis later ibus,abdominisque 

 dorso nigris, pedibus jlavescentihus fuscescente sublineatis. (Long. corp. 4 — 

 44 lin. ; Exp. Alar. 9—13 lin.) 



Pe. lutea. Steph. Catal. 315. Xo. 3540.— Pe. viridis. Curtis, fo. 190.— Pe. la- 

 teralis. Steph. Nomen. 2d edit. Appendix. 



Ochreous-green : eyes and ocelli black ; thorax, or rather the collar, with a 

 broad black margin ; abdomen black above, the base of the ventral segments 

 dusky; legs yellowish-green, with faint fuscescent streaks ; antennae dusky 

 at the apex ; wings greenish-yellow, with concoiorous nervures. 



Not uncommon within the metropolitan district, especially in the 

 vicinity of Ripley, in Walsham-meadows, in June ; also found in the 

 New Forest, and abundantly near Leominster. 



Sp* 3. media. Virescente-Jlava, oculis atris, abdominis dorso, mesothorace postice 

 metathoraceque nigris, alis viridi-Jlavescentibus. (Long. corp. 4 — 44- lin.; Exp. 

 Alar. 10—12 lin.) 



Pe. media. Curtis?— Steph. Catal 315. No. 3541. 



