4 THE LEPIDOFTERA OF CEYLON. 



somewhat short, slightly broad, exterior margin convex ; costal vein almost straight, 

 subcostal touching tlie costal near base ; two subcostal branches from end of the 

 cell, radial from middle of discocellular ; middle median from angle at end of the cell, 

 lower median at one-third before the end ; submedian and internal vein straight- 

 Body moderately stout ; palpi ascending to level of the eyes, second joint thick, laxly 

 clothed, third joint half its length, blunt at the tip ; antenuEe very slightly pectinated ; 

 legs stout, tibiae thick, laxly clothed, middle and hind tibijB spurred. 

 Type^ D. Orion. 



DIPHTHEEA DECEPTTJUA. 



Diphthera deceptura. Walker, Catal. Lep. Het. Brit. Mus. xxxii. p. 614 (1865). 



" Male. White : forewing with numerous black, denticulated or undulating, very 

 irregular, and more or less mcomplete lines ; base and middle part brown, the latter 

 including a white space ; marginal lunules black ; fringe with blackish marks ; 

 orbicular and reniform marks white, black bordered, very large, the former round, 

 the latter very much excavated : hiudwings yellowish-cinereous, with two undulating 

 lines and the exterior border diffusedly brown. Head with a black mark between the 

 eyes ; palpi brown in the middle part ; thorax slightly speckled with black ; abdomen 

 and underside bi'ownish-ochreous. 



"Expanse 12 lines." 



Described by Mr. Walker from specimens in Mr. E. L. Layard's Collection. 



Genus HYBOMA. 

 Hyloma, Hiibner, Veiz. bek. Schmett, p. 200 (1818-25). 



Male : forewing very moderately elongated, broad ; costa slightly arched at the 

 base, exterior margin oblique, convex, posterior margin convex near base ; cell long, 

 extending two-thirds the wing ; first subcostal emitted at more than half befoi'e end 

 of the cell, second at one-fourth, trifid, fifth from end of the cell and touching third 

 near its base ; discocellular concave in the middle, bent near lower end, radials from 

 upper end and the lower angle ; lower median at one-fourth and middle median from 

 an aiigle close before end of the cell ; submedian slightly curved : hindwing short, 

 apex convex, exterior margin oblique, waved ; costal vein extending to apex ; sub- 

 costal touching the costal near its base ; cell broad, long, extending beyond half the 

 wing; two subcostals on a footstalk one-fifth beyond the cell; discocellular very 

 convex, radial from below the middle ; two upper medians from end of the cell, 

 lower at nearly one-third before the end, submedian and internal slightly curved. 

 Body moderate ; palpi porrect, second joint extending half beyond the head, pilose, 

 the hairs projecting forward, third joint cylindrical, half length of second ; antennte 



