THE LEPIDOPTEEA OF CEYLON. 



Family CYMATOPHORIDiE. 



Imago of moderate size ; body mostly smooth. Larva smooth, or with little 

 eminences, living on trees or shrubs quite exposed, or between leaves united by silk. 

 {Stainton.) 



Genus RISOBA. 



Eisoba, Moore, Proc. Zool. Soc. !881, p. 328 ; Desc. Lep. Coll. Atk. p. 90. 

 Allied to Thyatira. Forewing somewhat shorter ; costal margin arched at end, 

 angle acute, exterior margin less oblique; second subcostal branch trifurcate, its 

 lowest fork (or fourth branch) near the apex, fifth branch curved upward from end 

 of the cell, and touching the third near its base ; discocellular obliquely concave, 

 slightly bent at its lower end; upper radial straight from end of the cell, lower 

 radial and upper median branch from angles close above end of the cell : hind- 

 wing very convex exteriorly ; costal and subcostal veins joined together at their 

 base, two subcostal branches from end of the cell, radial and upper median branch 

 from end of the cell, middle median branch from angle before end of the cell. Body 

 slender, thorax broad, crested in front ; antennas long, minutely pectinated in male. 



RISOBA REPUGNANS (Plate 144, Fig. 1). 

 Thijatirn repugnans. Walker, Catal. Lep. Het. B. M. ix. p. 9 (1856). 

 liisoba repugnans!, Moore, Proc. Zool. Soc. 1881, p. 328. 



Male : forewing purplish-brown, washed with silvery-grey ; with a purplish- 

 white basal oblique band, a spot on the middle of posterior mai'gin, and another 

 spot at the angle, also a large rounded spot at the apex, each with strongly defined 

 black inner border, the former suffused and the latter blotched with purple-brown 

 and traversed by a slender pale line ; orbicular spot prominent, with a purple-brown 

 centre and black-bordered line ; a black dot in middle of the cell ; two slender 

 indistinct blackish denticulated lines cross the disc from the apical to posterior spots ; 

 a marginal row of small black spots : hindwing purplish-white, with a broad pale 



VOL. III. B 



