HEMER0B1D.E. HEMEROBIUS. . 105 



Not uncommon near London ; also found at Dover, and in 

 Devonshire, in June. 



Sp. 12. Perla. Luteo-viridis, alls elongatis, apice acuminato, hyalinis, viridibus, 

 venis subconcoloribus. (Long. corp. 5—6 lin.; Exp. Alar. 14 — 21 lin.) 



He. Perla. Linne. — Donovan, v. viii. pi. 277. /. 2. — Ch. Perla. Steph. Catal. 

 311. No. 3458. 



Luteous- or yellowish-green, immaculate ; antennse rather fuscescent ; eyes 

 golden; wings rather long, the apex a little acuminated, hyaline, pale 

 whitish-green, with the nervures and stigma of a darker green. 



In some examples the metathorax is slightly clouded with fuscous. 



Very abundant in gardens, shrubberies, orchards, &c. during the 

 summer, not only near London, but throughout the south of 

 England; found also near Edinburgh. 



Sp. 13. subfalcata. Luteo-viridis, immaculata, alis elongatis attenuatis, apice 

 acuto, subfalcato, venis virescentibus. (Long. corp. 6§ — 7 lin.; Exp. Alar. 

 14— 16 lin.) 



Ch. subfalcata. Steph. Nomen. 2d edit. col. 115. 



Pale luteous-green, immaculate, but the base of the abdominal segments is 

 brownish ; whigs elongate, very narrow and attenuated, with the apex 

 acute, pale greenish, with rather darker nervures and stigma ; legs and 

 antennae pale ; eyes brassy. 



Taken, but not commonly, near London, in June. 



Gekus XX.— HEMEROBIUS Auctorum. 



Antennae nearly as long as the body, moniliform, the two basal joints largest, 

 the terminal ones transverse : labrum transverse, rounded on its margin : 

 jpalpi with the terminal joint elongate, fusiform-acute : head short, trans- 

 verse : eyes small, prominent : ocelli wanting : collar rather narrower than 

 the thorax, which is as wide as the head : wings deflexed during repose, 

 pubescent, in general with very numerous longitudinal nervures, many of 

 which are bifid on the margin, and a few transverse ones, all more or less 

 pubescent : abdomen moderate, slender : legs slender ; posterior tibie some- 

 times dilated. 



The insects of this genus differ from Chrysopa in having the 

 antennae short and moniliform, the wings abbreviated, broad, and 

 rather closely furnished with fine longitudinal nervures, in addition 

 to which are a few transverse ones, varying in number in several of 

 the species, being numerous in some, and very few in others ; those 

 of the last set differ also in having the nervures stronger and less 



Mandibulata, Vol. VI., 30th June, 1836. o 



