GEOMETRIDiE. THERA. 271 



Genus CCXXIL—Theh a* mihi. 



Palpi rather short, remote, approximating at the apex, acute, triarticulate, the 

 basal joint curved, of equal length with the second, which is a little attenuated 

 at the apex, both equally robust, terminal minute, subglobose : maxillw mode- 

 rate. Antennw short, pubescent within in the males, sometimes slightly bipecti- 

 nated nearly to the apex, which is simple; of the females simple, or with the 

 articulations very slightly produced : head siridll; forehead &a.t: eyes small: 

 thorax slender: wings, anterior ovate-triangular, with a transverse central 

 fascia ; posterior ample, oval : abdomen rather long and carinated down the 

 back in the males, with a large tuft at the apex ; shorter, rather stouter, and 

 acute in the females. 



This genus is also united to the former by Treitschke ; but it 

 evidently differs not only in the structure of its palpi (of which the 

 basal joint is of equal length with the second, and the terminal one 

 is minute, subglobose), but in the form, markings, and texture of 

 its wings : — the species of the present genus feed in their earlier 

 stages upon plants of the fir or juniper kind, and 1 believe all have 

 two annual broods. The first species differs by having the antennae 

 of the males slightly pectinated, and of the females obscurely ser- 

 rated. 



A. With the antennse slightly pectinated in the males. 



Sp. 1. simulata. Alis anticis rvfo-cinereis, basifasciaque medid anguIatd,fusco 



marginatd, rufescentibus, posticis rufo-aibidis. (Exp. alar. 1 unc. 2 lin.) 

 Ge. simulata. Hiibner, — N. G. simulata. Steph. Catal. pt.ii. p. 142. No. 6629. 



Anterior wings reddish-ash, with a rufescent patch at the base, bordered by 

 a curved, slightly angulated, fuscescent striga; in the middle of the wing a 

 waved, angulated, rufescent fascia, also bordered on each side with a fuscous 

 striga, and having a fuscous dot on the disc towards the costa ; the wing is 

 darker behind the central fascia, and has an obscure whitish waved striga 

 towards the hinder margin, clouded within with fuscous : posterior wings and 

 abdomen pale reddish-white. 



Slightly variable in colour, and a little so in the intensity and form of the 

 markings. 



Not common : my specimens were all taken in the neighbour- 

 hood of Birch-wood towards the end of June. — " Flisk, N. B." — 

 Rev. J. Fleming. 



* e»ja, insula. 



