GEOMETRTD.'E. OPORABIA. 273 



Wings cinereous ; anterior with an abbreviated fuscous fascia at the base, some- 

 what biangulated without; a second, considerably indented within and 

 lobate without, and very much sinuated from the lobe to the "inner margin— 

 which portion of the fascia is composed of a series of oval rings— with a 

 black dot towards the costa: hinder margin slightly clouded with fuscous 

 with a faint pale striga, and a distinct oblique line at the apex: cilia pale: 

 posterior wings paler, with an angulated darker line towards the hinder 

 margin : all the wings have a few scattered fuscous atoms. 



Caterpillar green, with a whitish and reddish line; it feeds on the juniper 

 ( Juniperus communis) :— the imago appears in September. 



I have seen but two specimens of tliis insect, both of which 

 occurred amongst the juniper-bushes which abound in one part of 

 Birch-wood. 



Genus CCXXIII. — Oporabia * mihi. 



Palpi minute, not visible from above, depending, triarticulate, the basal joint 

 stout, reniform; the second very short, subquadrate; terminal minute, 

 ovate : maxillce short. Antennas short, the articulations produced within in 

 the males, and each side furnished with several fine hairs, which produce 

 a slightly pectinated appearance; simple in the females: head small, short; 

 forehead broad: eyes globose: thorax slender: wings ample, thin anterior 

 rounded, disposed in a triangle during repose ; anterior ovate-triangular, more 

 or less marked with undulated strigae; yoo^f e?-/or somewhat oval : body short, 

 slender, and obtuse, with a slight tuft at the apex in the males; stouter and 

 acute in the females : legs simple : both sexes with wings. Larva smooth, 

 naked, lineated: pupa subterranean. 



The delicately thin, rounded, and ample wings of this genus, 

 united to the minuteness and structure of the palpi, the pilose and 

 slender antennae, abbreviated abdomen, and other characters, point 

 out its claim for distinction. 



Sp. 1. dilutata. Alis alhido-cinereis, anticis strigis variis undulatis duplicatis 

 triplicatisve saturatiorihus, posticis lineisfuscescentihus ad marginem posticum. 

 (Exp. alar. 1 unc.2 — 7 lin.) 



Ge. dilutata. Wien. Ferz. — N. G. dilutata. Steph. Catal. part ii. p. 142. No. 

 6633. — Ph. inscriptata. Don. xv.pl. 517. 



Wings whitish-ash, with various waved fuscescent strigae on the anterior, mostly 

 disposed in fasciae of two or three lines each, and placed nearly equidistant 



O^rs/ja, autumnus; fiiom, vivo. 



