TOUTRICID.K. AN'TITIIESIA. 87 



a tuft at the apex in the males, rather obtuse and stout in the females : Itgs 

 rather short and slender: 



In the synoptic list of the Tortricidae published by Treitschke, in 

 his 7th vol., he gives a genus nearly corresponding with the present 

 by the name Penrfina (a typographical error for Pcnth'ma, as cor- 

 rected in his subsequent volume) with Pe. salicana as the type ; but 

 when he proceeds to characterize it in his 8th vol., he introduces To. 

 revayana, Wieii. Verz. (the genus Sarrothripus) for the type, as 

 section A, consequently his name becomes obsolete, and a new appel- 

 lation is required ; I have therefore continued the one published in 

 my Catalogue, in allusion to the contrasted colours with which all the 

 species are so prettily adorned ; the anterior wings being either black 

 at the base with white, variegated or spotted, tips, or black with the 

 inner margin, except at the apex, white, spotted with black. 



A. Anterior wings with the base black, the costa pale at the ape.x : — 

 ApotoimiSj Hiibner. 



Sp. 1. corticana. Alis anticis allns, bast nigra plumheoqiie varicgatis, fascia 

 media nigra, postice niveis, posticis j'uscis. (Exp. Alar. 9 — 10 lin.) 



To. corticana. Hiibner. — An. corticana. Stcph. Catal. ii. 172. No. 6891. 



Anterior wings white, the base varied with lead-colour and black, having two 

 snowy blotches, followed by a rather distinct black fascia, irregularly 

 simiated posteriorly, the apex of the wing snow-white, with ashy-white 

 clouds and a few blackish dots, the latter disposed in a short fascia on the 

 hinder margin: on the costa are three or four black dots; the base of the 

 inner margin is varied with black : posterior wings fuscous. 

 Rather scarce: found in the middle of July at Coombc and 



Darenth woods. I am not awiire of any other locality. 



Sp. 2. Betuletana. Alis anticis hasi fuscesccntihus atro plumhcocjuc ncbidosis. 

 posticc albis, posticisfuscis. (Exp. Alar. 9 — 10^ lin.) 



To. Betuletana. Haworth. — An. Betuletana. Steph. Catal. ii. 173. No. 6892. 



Anterior wings brownish-black at the base, with darker black spots and lead- 

 coloured clouds, the apex obliquely white, clouded with ash-colour, costa 

 with some dusky spots : posterior wings fuscous. 



The anterior wings vary slightly; in some examples the white on the apex 

 is immaculate ; in others it is entirely suffused with ochraceous, and more 

 than usually clouded ; but all the varieties may be known from the fore- 

 gohig by having the termination of the dark basal cloud extending obliquely 

 to the anal angle of the wing, whereas in An. corticana this part terminates 

 less obliquely, and does not extend to the angle. 



