184 Mr. H. T. Stainton on Gracilaria, 



have dark margins, and are preceded by darker scales on the sides 

 next the base. Cilia grey, with the white markings continued 

 through them, and with two rows of dark spots round the apex. 



Posterior wings grey, with grey cilia. 



First discovered by Mr. Douglas at Charlton sand-pit, July 29th, 

 1847; in the following summer Mr. Douglas again met with it, 

 and observed that it frequented the Artemisia vulgaris ; on the 

 3rd July last year I observed the leaves of this plant, in a lane 

 between Birch Wood and Dartford Heath, mined by some larva, 

 and collected several of them ; these I kept in a tin canister along 

 with several other plants collected at the same time, and from the 

 leaves thus mingled together I obtained two specimens of Omis- 

 sella, but whether from the Artemisia leaves or not I cannot posi- 

 tively say.* 



Sp. 17. Scalariella, Zeller. 



" Thorace et capite cum palpis niveis, alis anticis laete brunneis, 

 vitta dorsali interne obtuse dentata nivea." 



Scalartella, Z. Ent. Ztg. 1850. S. 160. 



" Larger than Gr. ononidis. Head rather shining, snow-white. 

 Antennae brownish, with a darker basal joint. Maxillary palpi 

 small, thin, pointed, whitish ; labial palpi longer than the thorax, 

 rather slender, falcate, at the end of the second joint somewhat 

 thickened beneath by loose hairs, white ; the pointed terminal 

 joint half the length of the palpi. Thorax snow-white, on the 

 shoulders pale yellowish-brown. The four anterior legs have the 

 femora grey-brown, the tibiae black-brown, with the base white ; 

 the tibiae of the middle pair have the base itself brown, on the 

 light side (in front) ; tarsi silky-whitish, with a brown spot at the 

 base of each joint on the shady side. Posterior legs shining, with 

 the femora grey, the tibia? brownish-grey, and the tarsi brownish- 

 white, with grey-brown spots at the bases of the three first joints. 

 Abdomen grey-brown, beneath whitish. 



" Anterior wings rather narrow, pale yellowish-brown. On the 

 costa, before the apex, is a white, black-margined hook, curved 

 outwardly, and at some distance before it a white, black-margined 

 costal spot (this is entirely wanting on the right wing) ; at the end 

 of the cilia of the apex of the wing are two white, broader, ap- 

 proximating, marginal hooks, under which the ground-colour is 

 continued to the end of the cilia as a long streak, beneath mar- 

 gined with white. At the base of the inner margin arises a streak, 



* In July, 1851,1 reared this species freely, from larvae which mined the leaves 

 of Artemisia. 



