GEOMETRIDiE. EUCOS3IIA. 265 



Genus CCXVIII. — Eucosmia * mihi. 



Palpi moderate, remote, not porrected in form of a beak ; the base clothed with 

 squamous hairs, the apex with short dense scales, and somewhat dolabriform, 

 acute; triarticulate, the basal joint robust, curved, the second rather more 

 slender and shorter, slightly bent, terminal minute ovate, acute : maxillce rather 

 long. Antennw simple in both sexes, slightly pubescent within in the males : 

 head small : forehead with a slight squamous crest : eyes glabrous : thorax 

 slender, simple : wings placed in a triangular position during repose ; anterior 

 with the posterior margin obsoletely waved ; posterior very distinctly indented; 

 all thickly marked with dark flexuous lines on a pale ground ; and the inner 

 margin of the posterior, in the males, with a large fascicle of scales : legs 

 simple ; posterior tibice slightly incrassated, and furnished with two pair of 

 very short spurs. Larva with 10 legs. 



The males of this genus are rendered conspicuous by the singular 

 fascicle of hair-like scales which adorns the inner margin of the 

 posterior wings ; and both sexes are admirably distinguished by the 

 numerous waved transverse lines which decorate all the wings : the 

 palpi are very unlike those of Camptogramma, but the genus seems 

 evidently more allied to that genus than to Boarmia, near which it 

 has been recently placed. 



Sp. 1. undulata. Alis griseo-cinereis, strigis niimerosissimis ferundidatis fuscis 

 extus alhis. (Exp. alar. 1 unc. 3 — 5 lin.) 



Ph. Ge. undulata. Linnc.—Don. x. pL 34>2.f. 3.— N. G. undulata. Steph. Catal. 

 part ii.p. 140. No. 6616. 



Griseous-ash ; all the wings with numerous undulated fuscous strigoe alternating 

 as it were with whitish ones, and with a very distinct and more undulated 

 whitish one towards the hinder margin ; the strigse in the middle of the 

 anterior wings are somewhat united in a chain-like form towards the inner 

 margin, and near the costa is a conspicuous black dot: ciha pale, with fuscous 

 clouds ; body fuscous, spotted with black : the fascicle on the inner margin of 

 the posterior wings of the male is tipped with fuscous. 



Slightly variable, arising from the striga on the anterior wings being more or 

 less remote or confluent in the middle of the wings. 



Caterpillar is said to feed on the sallow (Salix caprea) :— the imago appears 

 towards the end of June, frequenting woods. 



Not common : found occasionally at Darenth and Coombe 



* Eu, bene ; y.offfnos^ ornatum. 



Haustellata. Vol. III. 1st July, 1831. 



