164 HAUSTELLATA. LEPfDOPTERA. 



I have followed Dr. Leach in applying the term Geometra to this 

 genus, from the circumstance of the typical species chiefly forming 

 the first division of the Linnean Geometrse : Duponchel follows 

 Treitschke in calling the genus Ennomos, but as the present genus 

 forms a portion of the two last sections of the last-named author's 

 Ennomi (the type of his genus being En. flexula, hereafter described 

 by that name), that appellation is consequently incorrect. The 

 Geometrse are gay and lively insects, the males, especially of the 

 second division, delighting in flying in the solar rays, and during 

 repose sitting with their wings erect, and exposing their beautiful 

 under surfaces; they frequent woods, and are usually of brilliant 

 tints of yellow or fulvous, with transverse strigse, and occasionally 

 some transparent lunular discoidal marks, as in the Bombycidse: 

 their larvae are tubercular, and resemble twigs. 



A. With the posterior wings distinctly angulated. 



Sp. 2. Tiliaria. Alis fulvis, fusco-irr oralis, anticis strigis duabus subincurvis 

 lunuldquefuscis, thorace sulphureo. (Exp. alar. 1 unc. 4 — 6 lin.) 



Ge. Alniaria. Haworth. — Steph. Catal. part ii. p. 119. No. 6460 : excl. syn. 

 I An., &c. 



Deep fulvous-yellow : anterior wings thickly dotted, and the costa more or less 

 clouded, with fuscous, with two slightly incurved oblique nearly parallel 

 fuscous strigse, between which is an elongate fuscous spot, mostly arising on 

 the costa: hinder margin slightly spotted with black: posterior wings less 

 irrorated, with an obscure fuscous transverse central striga ; the hinder margin 

 sometimes darker, with fulvescent or ustulated spots on the angles of the 

 denticulations; thorax bright sulphur yellow. Both sexes alike. The position 

 of the strigae varies but little, but the wings vary slightly in colour. 



Caterpillar tubercular, deep brown, with lighter and whitish shades ; head flat, 

 small: — it feeds on the Ume, alder, &c. : — the imago appears towards the end 

 of August, but is rare. 



Taken in the woods about London, especially at Darenth and 



Sp. 1 . Alniaria. Alis Jlavis, Jusco-pulverulosis, anticis strigis duabus, obsoletis, 



aut subinterruptis,fuscis. (Exp. alar. 2 unc. 1—2 lin.) 

 Ph. Ge. Alniaria. Linn.— Stewart (.'). 



Wings fulvous-yellow, irrorated or spotted with fuscous, the anterior with two 

 very obsolete fuscous strigse in the male, and two stouter interrupted ones in 

 the female, the hinder margin spotted with black on each angle: thorax fulvous. 



Said by Stewart to inhabit England, but probably from the circumstance of 

 Donovan having given a figure of Ge. Quercinaria by the above name. 



