304 



ORACILARIID.E. 



vein is furcate ; the subcostal vein is obsolete towards the base ; the 

 subdorsal vein is simple. In the posterior wings the apical vein ter- 

 minates above the apex, below it is a furcate vein ; the median vein is 

 trifid. 



The liabits of tlie perfect insects of this genus are very similar 

 to those of the GraciJar'ue, but the smaller species are far more 

 frequently observed on the wing. None of this genus pass the 

 winter in the ])erfect state, all being then in pupa. The larva?, 

 when young, arc true miners, and their mines can with difficulty 

 be distinguished from those of a Llll/ocoflelis larva; but as soon 

 as the larva leaves the mine, the fact of its being untenanted, and 

 uo pupa-skin protruding, sufficiently demonstrates that it is no 

 LifJ/ocoIle/is mine. After quitting its mine, the larva turns down 

 a piece of the edge of the leaf, and feeds within the cavity thus 

 formed ; except in the case of the larva, which feeds on the haw- 

 thorn, this turned-down place does not assume the conical form 

 so prevalent with the larvre of GracUar'ui ; wdien full-fed, the 

 larva turns down a smaller portion of the edge of the leaf, and 

 p})ins therein a Ih'm, rather fiat, ochreous cocoon. 



I einimerate only nine British species of this genus, though 

 probably I have individual- specimens of two or three others, but 

 the crlreme similarity/ of many of the species renders it extremely 

 unsafe to describe from single caufjj/t specimens; one of the 

 strongest characters for discriminating the species lying in the 

 c.rtrcme ti/j oj' the cilia of the anterior wings, which can rarely be 

 well seen except in tjfcd specimens. On the continent are four 

 or hvc other distinct species. 



The genus may be thus subdivided : — 

 a. Anterior wings with numerous short whitish or white streaks from 



the costa. fSpecies 1-8. 

 a a. Anterior wings with three triangular yellowish marks on the costa. 



Species 9. 



1. Avellasxella, Sta. — mcleagripcnnella, Sta. Ent. Trans, i. n. s. 

 88. — iaxcJIa, ('url.? Alis anticis dlhUe griscis, dorso albo-farinato, 

 strigulis numerosis costie albitli.s, niaculis duabus plicte, una posteriore 

 (lisei fuscis, ])uncto apicis liisco ; ciliis albidis, Hiwls duabus inlegris 

 fuscis (lb apice us([ue ad anguluni analem ; palpis albis, arliculi tertii 

 basl anmdoijHe ante aplci'nbj'ii^ic'is. Exp. al. \ liu. 



Head whitish, mixed with fuscous. Eace grey. Palpi whitish, the 

 last joint 'with the base and a ring before the ajjex fnscoKs. Antennae 

 (hu-k fuscous, annulated with white. Anterior wings pate grey, iiiter- 

 • mixcd witli white, especially along the imier margin ; along the eosta 

 are numerous short whitish sfrc^aks, obliipiely placed till near the apex, 

 the three inuuediately bclbn; the apex nearly straight ; in tiie fold arc; 



