326 THE LEPIDOPTERA OF CEYLON. 



hind win o- with the exterior margin more convex hindward. Venation similar. 

 Body longer, anal tuft of lax silky hairs ; labial palpi porrect, broad, rounded in 

 front, smoothly clothed with broad coarse scales, third joint minute ; maxillary 

 palpi short, broad and squamous at the tip ; antennce thick at the base, setaceous, 

 slio-htly contorted and flattened at about one-third the length, with a few fine very 

 minute lashes ; legs moderately stout, smooth, middle tibijB slightly thickened and 

 laxly squamous ; spurs slender, unequal. 

 Type, C. conchylalis. 



CYDALIMA CONCHYLALIS. 



Margarodes conch'jlnlis, Guenee, Delt. et Pyral. p. 303, pi. 8, fig. 9 (1854). 

 Margaronia conchi/lalis, Walker, Catal. Lep. Het. B. M. xviii. p. 529 (1859). 

 Cydalima conchylalis, Lederer, Pyral. Wien. Eut. Monat. vii. p. 397 (1863). 



Wings hyaline-white, opalescent, with a slender brown marginal line, which is 

 composed of lunular spots in the forewing. Costa of forewing with a metallic 

 cupreous-brown baud, but which does not extend beyond the subcostal vein, and 

 has a slight white dentation at end of the cell. Body silky white ; collar on thorax, 

 head, palpi above, fore femora and tibite above cupreous-brown ; middle tibiee and 

 tips of tarsi paler brown ; base of palpi, body beneath, and legs white. 



Expanse, S 1 i^u, ? lyV inch. 



CYDALIMA LATICJSTALIS (Plate 182, Fig. 4). 



Margarodes laticoslali's, Guenee, Delt. et Pyral. p. 303 (1854), J. 

 Margaronia taticostalis, Walker, Catal. Lep. Het. B. M. xviii. p. 528 (1859). 

 Cydalima laticostalis, Lederer, Pyral, Wien. Ent. Monat. vii. p. 397 (1863). 

 Margaronia Lcodiceal is, Walker, Catal. Lep. Het. B. M. xviii. p. 530 (1859),^. 



Wings hyaline-white, opalescent, with a slender brown marginal line, which is 

 composed of lunular spots in the forewing. Costa of forewing with an irridescent 

 cupreous-brown band of equal width to the apes, extending half across the cell, 

 and indented by a white streak at end of the cell. Body silky- white; abdomen 

 with a tendency to show blackish segmental bands ; collar, head, palpi above, fore- 

 logs except the tarsi, and middle tibite iindescent cupreous-brown ; base of palpi, 

 body beneath, and legs white. 



Expanse, i \-r^, ? 1 tV inch. 



Genus PACHYARCHES. 



Farotis* Hiibner, Samml. Exot. Schmett. iii. p. 30, fig. 523-4 (1825). 



Pachyarches, Lederer, Pyral. Wien. Ent. Monat. vii. p. 398 (1863); Meyrick, Trans. Ent. Soc. Lond. 

 1884, p. 295. 



Male. Forewing elongate, costa arched towards the end, with a fold of Ion 2: 



* Parotia used in 1816 for a aeuus of Birds. 



