354 Mr. R. M‘Lachlan’s New Genus of Perlide. 
PERLIDE. 
STENOPERLA, 0, g. 
Palpi maxillares articulis basalibus duobus brevibus, aquali- 
bus, latis, caeteris planiusculis, 3° et 4° singulis 2° duplo 
longioribus, 5° 4° breviori. Antenne breves, graciles, Ocelli 
tres. Abdomen gracile, caudis analibus brevibus, gracilibus. 
Ale quiescentes corpus circumvolventes: antice per-anguste, 
elongate, venulis transversalibus numerosis regulariter in- 
structee: postice anticis triplo latiores, plicata, venulis 
transversalibus ubique regulariter instructe. 
Type.—Chloroperla prasina, Newman, The Zoologist, 1845, 
p- 853, 2; Hermes prasinus, Walker, Cat. Neurop. Brit. Mus. 
pt. 2, p. 206, 10; from New Zealand. 
In the form of the maxillary palpi, and in the numerous trans- 
verse veins distributed pretty evenly over the whole of the pos- 
terior wings, this genus approaches Eusthenia of Westwood. In 
repose the wings form a nearly complete cylinder concealing the 
body, as in Leuctra. 
