74 THE LEPTDOPTERA OF CEYLON. 



PLUSIA IMPULSA. 



Plusia impnha, Walker, Catal. Lep. Het. B. M. xxxiii. p. 838 (I860). 



" Female. Pale oclireous : forewings with a slight lilac tinge ; three pale 

 brownish-bordered oblique slightly curved lines ; interior and exterior lines widely 

 apart, space between them brightly gilded reddish-speckled, containing an oblique 

 gilded silvery streak ; a reddish apical spot ; reuiform mark very indistinct ; marginal 

 line pale, brown bordered : hindwings whitish-cinereous beneath, with two indistinct 

 brownish lines. Abdomen and underside whitish-cinereous. 



" Expanse 10 lines." 



Described by Mr. Walker from specimens in the Collection of Mr. E. L. Layard. 



PLUSIA MDTANS. 

 Plumi mutans, Walker, Catal. Lep. Het. B. M. xxxili. p. 839 (1865). 

 " Female. Cinereous : forewings cupreous tinged, glistening, with some undu- 

 lating cinereous lines, of which a double one beyond the middle is moi'e distinct 

 than the others ; submarginal line cinereous, zigzag ; disc with an oblique lanceolate 

 silvery streak, which is furcate at the base ; marginal line pale cinereous, marginal 

 lunules blackish. Head and thorax slightly tinged with ferruginous. 

 " Expanse 18 lines." 



Genus PLUSIODONTA. 



Plusiodonta, Guonee, Noct. ii. p. 359 (1852) ; Walker, Catal. Lep. Het. B. M. xii. p. 937. 

 Deva, Walker, Catal. Lep. Het. B. M. xii. p. 962 (1857). 



Forewing rather short, costa almost straight, pointed at the apex, exterior 

 margin slightly angular in the middle, oblique hindward, posterior margin excavated 

 from the end, lobed beyond the middle, the angle and lobe fringed ; cell long, narrow, 

 extending three-fifths the length ; first subcostal emitted at one-third before end of 

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

 its base ; discocellular concave, radials from upper and lower end ; middle median 

 from close to end of the cell, lower at two-fifths before the end ; submedian recurved : 

 hindwing broad, exterior margin convex ; two subcostals from end of the cell ; disco- 

 cellular concave, radial from close to lower end ; two upper medians from end of the 

 cell, lower at one-third ; submedian and internal vein straight. Body slender, thorax 

 crested ; palpi long, second joint pilose, thick, ascending to vertex, third joint linear, 

 almost as long as the second ; antennjB very minutely and sparsely pectinated ; legs 

 rather long, squamose, spurs long. (P. conducens.) 



