GEOMETRIDiE. — CABERA. 197 



Snow-white ; wings short, the hinder margin considerably rounded, slightly 

 sprinkled with pale fuscous, with two common somewhat waved plumbescent 

 strigfe, of which the anterior on the anterior wings is, as it were, duplex : cilia 

 immaculate white. 



The above is nearly Mr. Haworth's definition of this very distinct and pretty in- 

 sect:— it differs from the last by being smaller, by having the anterior striga 

 of the anterior wings very much curved, and in general closely approximating 

 to the second (or counterpart of the above description) : the posterior striga is 

 nearly straight. The strigse vary much in intensity, and in one of my speci- 

 mens the two first are united in the middle and form a cross. 



Rather scarce : my specimens were all taken in Darentli-wood in 

 May; but the insect has been captured at Coombe and Birch 

 Woods at the same period and in August. 



Sp. 3. exanthemata. AUs sordide albidis, subfusco-atomosis, anticis strigis 

 tribus, posticis duabus fusco-lutescentibus, ciliis pallid} ochraceis. (Exp. alar. 

 1 unc. 1 — 3 hn.) 



Ph. exanthemata. Scopoli. — Ca. exanthemata. Steph. Catal. part ii. p. 126. 

 No. 65 1 6. Albin, pi. xcii./. e—k. ; pi. xcix./. a—d. 



Dull-white: wings sprinkled with minute pale-fuscous dots ; the anterior with 

 three and the posterior with two pale lutescent-brown strigae, the latter cor- 

 responding with the two outer ones on the anterior wings : cilia pale ochraceous, 

 or flavescent. Beneath all the wings are thickly sprinkled with dark fuscous, 

 and have each a distinct black dot in the centre. 



Also very variable as to the disposition or absence of the strigse, as well as in the 

 intensity of their colour; in some examples the central one is almost or totally 

 united to the first— forming the Ge. approximaria of Haworth; or the wings 

 are more thickly sprinkled with fuscous— and form the Ge. striaria of the 

 same writer. 



I possess one specimen, which I captured at Darenth, entirely of a deep ashy- 

 brown, with scarcely a vestige of strigae. 



Caterpillar reddish above, with a pale lateral streak and a white line on the 

 margin of each segment: it feeds on the birch :~the imago appears in May 

 and August. 



Also very abundant in woods and bushy lanes adjoining planta- 

 tions of birch. " Epping."— Mr. Douhleday. " Black Hall wood 

 and Cummersdale."— T. C. Heysham, Esq. " Newcastle, Keswick, 

 &c."— G. Wailes, Esq. " Weston-on-the-green."— R^f . ^. H- 

 Matthews. 



