GEOMETRlDiE. — ENNOMOS. 323 



eyes globose : thorax moderately slender : wings expanded during repose ; 

 anterior elongate, with a deep notch towards the apex of the hinder margin ; 

 posterior entire, rounded : body rather stout in both sexes, acute and slightly 

 tufted : legs stout ; posterior tibiw incrassated, with two pair of long spurs. 

 Larva with a dorsal protuberance, the posterior legs rather short. 



Duponcbel has given the name Aventia to this genus, but as it 

 is the type of the genus Ennomos of Treitschke, I have adopted 

 this latter name in preference to the new one proposed by Du- 

 poncbel: — the genus is evidently very distinct, and may be known 

 from all the preceding by the form and texture of the wings, the 

 long conspicuous palpi, simple antennae, slightly robust body, &c., 

 and sublacertine larva. 



Sp. 1. flexula. All's griseo-cinereis, anticis strigis duahus angulatis albidis fusco 



adnatis, punctisque duobus interjectis. (Exp. alar. 1 unc. 3 — 4 lin.) 

 Ph. flexula. Fabricius. — En. flexula. Steph. Catal. part ii. p. 155. No. 6748. 



Wings griseous-ash, thickly irrorated with fuscous, the anterior pale at the 

 base, with a pale strlga, bordered with fuscous, before the middle, and 

 angulated towards the costa ; and a second striga of similar colours behind the 

 middle, also angulated near the costa ; between these are two fuscous dots, 

 placed transversely ; behind the posterior striga the colour is darker, and in 

 this is an obsolete pale flexuous striga ; cilia umbre- coloured : posterior wings 

 with a pale striga behind the middle, edged with fuscous, with an obscure 

 fuscous spot between it and the base, an obsolete pale striga towards the 

 hinder margin, and a row of minute black dots. 



Caterpillar greenish, with the neck, the dorsal protuberance, tail, head, and legs 

 reddish: it feeds on lichens : — the imago appears about the middle or end of 

 July. 



Not common ; found in woods within the metropolitan district : 

 one specimen taken at Ripley on the 3d instant. " Epping." — 

 Mr. Douhleday. " Weston-on-thc-green." — Rev. A. H. Matthews. 



