TORTRICINA. 21 



A. With the basal cloud on the anterior wings extend- 

 ing on the costa to, or slightly beyond, the middle . Species 18 



B. With the basal cloud extending beyond the middle 

 of the costa. 



a. With the base of the posterior wings of the $ 



white Species 9, 10 



b. With the base of the posterior wings of the tf 



no t white Species 11-13 



C. With the anterior wings entirely dark-coloured . Species 14 



1. corticana, Hub. Alis anticis niveis; basi nigro plumbeoque 

 variegatis; fascia media nigra, atro-punctata ; posticis fuscis. 

 c? Exp. aJ. 9-10 lin. 



Head fuscous mixed with grey. Face same colours, but slightly 

 darker. Eyes black. Palpi above, at apex, at sides, and between, 

 dull fuscous; at the base beneath and between, pale drab. An- 

 tennae pale fuscous, darker beneath. Thorax dull umber, alternately 

 streaked transversely with dull grey. Patagia coloured like the 

 thorax. Anterior wings dull, snow-white ; the costa broadly macu- 

 lated with black patches mixed with white scales. Near the base is 

 an interrupted curved fascia ; at the middle of the costa commences 

 a very broad irregularly angulated fascia, extending to the dorsal 

 margin, composed of mottled fuscous, umber and black markings ; a 

 conspicuous longitudinal black mark runs through it, above the 

 middle ; this fascia is produced inwardly, and joins the basal patch 

 at its interruption, thus enclosing a white space on the costa ; out- 

 tvardly its edge is projected into three nodes, with a deep incision, 

 level with the longitudinal black streak before named; a broad 

 fuscous and umber- coloured cloud extends from the base to the 

 central fascia, leaving a white space above. The upper edge of the 

 dorsal cloud towards the base is marked with a strong longitudinal 

 black line. The apical region white, marked with curved streaks, 

 composed of black and white scales, more or less intense, but most 

 distinct at the apical margin and apex ; on one of these streaks, in 

 the middle, are several black dots ; sometimes the apex is faintly 

 reticulated. Apical scales deep fuscous, with white tips. Cilia grey 

 mixed with iron-grey, and with a fuscous tinge, both becoming 

 white at, and grey beyond, the anal angle. Posterior wings fuscous. 

 Marginal scales fuscous, with luteous bases. Cilia pale grey, with a 

 fuscous tinge. Abdomen and caudal tuft pale fuscous grey. $ Exp. 

 al. 9-10 lin. 



Rather an uncommon species, and does not vary : it is, in 

 appearance, like Brachyttenia Hartmanniana, but is distin- 

 guished from it by the ground-colour of the anterior wings 

 being white instead of pale drab, and by the uninterrupted 

 fascia beyond the middle. The white patches at the base of the 



