56 Transactions. — Zoology. 



10. EtTKYTHECTA, 11. g. 



Thorax smooth. Antennae in male shortly ciliated. Palpi moderate, 

 porrected, second joint triangularly scaled. Forewings with costa simple in 

 male. Hindwings broader than forewings, cilia long. Forewings with 

 10 separate veins, vein 6 to costa, (normal veins 3 and 4, 7 and 8 being 

 probably coincident). Hindwings with 7 veins, 2, 3, 4 remote at origin, 

 short and nearly parallel, 5 and 6 rising near together, 7 free, cell long, 

 transverse vein bent, rather outwardly oblique, (normal veins 3 and 4 

 coincident). 



The only known genus of the group possessing only 10 veins in the 

 forewings ; and the venation of the hindwings is also peculiar. The type 

 does not, however, appear ancestral, but rather as an eccentric development 

 from Tortrix. 



26. Eur. robusta, Butl. 

 (Zelotherses robusta, Butl., Proc. Z.S.L., 1877, 403, PL XLIIL, 17; Steganoptycha negli- 

 gent, ibid., 404, PL XLIIL, 18.) 



Parva, alis ant. albis, ochreis, vel runs, fasciis duabus obliquis perfractis, 

 maculis costaa marginisque postici septem nigrescentibus ; post, griseis. 



Male, female. — 9|— 10 mm. Head white, often suffused with ochreous 

 or reddish-ochreous, face and a longitudinal line on crown generally re- 

 maining white. Palpi white, externally generally suffused with ochreous. 

 Thorax varying from white to reddish-ochreous, back sometimes dark 

 fuscous. Antennae grey. Abdomen elongate, stout, whitish-grey or 

 whitish. Legs white, anterior and middle pair suffused with dark fuscous 

 except at apex of joints. Forewings very narrow, costa in male almost 

 straight, in female slightly arched, hindmargin very oblique, nearly 

 straight ; white, grey-whitish, ochreous, or reddish-ochreous-brown, the 

 white specimens often partially suffused with pale ochreous ; markings 

 sharply defined, dark fuscous or blackish ; a narrow very oblique fascia 

 from near base of costa to inner margin before middle, rather widely inter- 

 rupted immediately below costa, broadly dilated towards inner margin ; a 

 moderate oblique fascia from before middle of costa to inner margin at f , 

 evenly broad, generally interrupted beneath costa, margins sometimes 

 irregular ; three small subquadrate equidistant inwardly oblique spots on 

 costa between central fascia and apex, often separated by white scales, a 

 fourth at apex, and three others on hindmargin : cilia whitish, whitish- 

 ochreous, or grey, base barred with black and white. Hindwings fuscous- 

 grey, darker posteriorly, thinly scaled towards base ; cilia whitish or grey, 

 with a darker basal line. 



A rather handsome and very distinctly marked species, extremely vari- 

 able in colour, 



