HEMEROBID^. OSMYLUS. 99 



amongst lichen, &c. on trees, from which, by means of their clothing, 

 they are not easily discerned : the perfect insects frequent weeds and 

 gardens, and are easily known by their ample wings, which are very 

 beautifully reticulated, and in general highly iridescent : their eggs 

 are deposited on leaves, or the stems of trees, upon a more or less 

 lengthened footstalk, somewhat resembling a thin pin stuck thereon. 

 The indigenous species may be divided into the following genera, 

 thus cursorily distinguished by external characters : — 



Oce//t 3, frontales. per triangulum dispositi : . . • 17> Osmylus. 

 nuUi : 



AHs anticis \)ostice exdais : . . . .18. Drepanepteryx. 



integris, aut rotundatis: 



Jfratoi/ice articulis cylindricis : . . .19. Chrysopa. 



moniliformes : . . .20. Hemerobius. 



Gknus XVII.— osmylus, Latreille, 



AntennvE short, moniliform : labium with its apex straight, transverse, mar- 

 gined, the margin linear and somewhat cleft in the middle : labrum round : 

 head transverse, forehead tumid : eyes moderate .■ ocelli three, placed in a 

 triangle, and approximating: collar very distinct, elongate-cylindric, 

 rounded in front, much narrower than the thorax, which is short, produced 

 a little in the middle behind: metathorax tuhercvXar : wings \ox\g, pilose, 

 depressed when at rest ; somewhat lanceolate, and faintly acute on the 

 hinder margin, rather closely nerved, the nervures bifid on the margins, and 

 forming rhomboid or polygonal areolets on the disc; the costa of the 

 anterior pair slightly dilated and rounded. 



From the other genera of this family the present may be known 

 by having three distinct ocelli, placed in a triangle and approximating; 

 they also differ in other external points, as in the short moniliform 

 antennae, the acute spotted wings, the reticulations of which hkewise 

 differ, &c. 



Sp. 1. maculatus. Fuscus, capite pedibusque testaceis, alis hyalinis, anticis, 

 limbo prassertim, costaque posticarum fusco maculatis. (Long. corp. ^^ — 5| 

 lin.; Exp. Alar. 1 unc. 6 — 10 lin.) 



He. maculatus. Fabricius. — Os. maculatus. Leach, — Samouelle, pi. 7./. 4. — 

 Steph. Catal. 310. No. 3447. 



I[ead bright testaceous or fulvous ; thorax and abdomen fuscous ; legs dull 

 testaceous ; wings hyaline, anterior pair with several deep fuscous spots on 

 the disc, numerous larger ones on the costa and on the inner margin, and 



N 2- 



