154 THE LEPIDOPTEEA OF CEYLON: 



CHILASA CLYTIOIDES (Plate 56, Fig. 1, i). 



Nearest to C. Clytia. Male and female. Umber-brown : forewing with darker 

 brown interspaces between the veins, a submarginal series of small dentate brownish- 

 white spots, and a marginal row of smaller points : hiudwiug with a discal series of 

 lengthened sagittate brownisli-white marks, outer contiguous row of dentate lunules, 

 and a marginal row of narrow lunules, the anal lunules ochreous and interspaced by 

 a black spot. 



Expanse 4 incites. 



CHILASA LANKESWAEA (Plate 56, Fig. 2, a, h). 

 PapUio Lankesivara, Moore, Ptoc. Zool. Soc. Lond. 1879, p. 143. 



Differs from C CltjUoides in having comparatively larger and broader wings, 

 Male. Forewing with only four submarginal spots, and a marginal row of points : 

 hindwing with smaller and shorter discal sagittate marks, narrower dentate lunules, 

 and the maroinal lunules shorter and broader. Female. Forewing with a submar- 

 ginal series of small dentate spots : hindwing with less prominent sagittate marks, 

 narrower outer dentate lunules, and slender marginal lunules. 



Expanse, S 4, 2 4j inches. 



Larva and pupa similar to those of C. dissimilis. Feeds on Tetrantliera. 



Genus ORNITHOPTERA. 



07-ntthoptera, Boisdnval, Voy. Astrolabp, L^p. p. 33 (1832). 

 Amphrisius, Swainson, Zool. Ilhi.otr. 2nd Ser. pi. 98 (1832-3). 

 Troides (part), Hiibner, Verz. bek. Schmett. p. 87 (1816,1. 

 Pachlioptera (part), Rtakirt. 



Male. Forewing large, powerful, elongated triangular; costal vein extending to 

 three-fourths the margin ; first subcostal branch emitted at one-half and second at 

 one-fourth before end of the cell, third from a short distance beyond the cell and 

 terminating at the apex, fifth at nearly one-half from below the fourth ; cell extending 

 beyond half the wing; upper discocellular shortest, straight, lower obliquely concave 

 at its upper end ; radial from their angle; fourth median vein from lower end of the 

 cell, third at one-seventh, second at one-third, and first at one-half before end of 

 the cell ; median and submedian veins connected by a short transverse veinlet near 

 the base ; submedian with a short basal lower internal vein : hindwing small in 

 proportion to the forewing ; costa shghtly arched, exterior margin rounded and 

 scalloped, abdominal margin folded ; precostal vein two-branched, the inner branch 

 l)ent downward and united to the costal ; first subcostal emitted at one-third before 

 end of the cell ; upper discocellular oblique, second shortest, radial from their angle ; 

 jniddle median at one-fifth, and lower at one-tliird before end of the cell ; sub- 



