i ( cxiv ) 



Scent-scales of this assemblage aie very remarkable. There 

 is a sti"ong family resemblance between them, though the 

 species are easily distinguished. The plume-scale of Fereute 

 charops is a fair representative of the genus. The sides of 

 the lamina in this species are parallel or with a very slight 

 lateral compression, expanding somewhat towards the base. 

 The apex is blunt and the fimbriae narrow. The most curious 

 feature in the scale is the prolongation of the base into two 

 long tapering cornua, which are often bent like a pair of 

 mammalian hind-legs. The long, narrow lamina with its 

 cornuated base strongly suggests the egg-case of a skate, 

 commonly known as the "mermaid's purse." 



The plume-scale of Pereute swainsonii is very like that of 

 /■*. charojos, but the basal processes or cornua are still longer 

 and as a rule more wavy and divergent. The scale in P. 

 callinice has the same general character, but the lamina is 

 broader at the base and the apical region is compai-atively 

 narrow. The apex itself is blunt, and occasionally twisted. 

 In Pereute leucodrosime the base is still broader and the 

 lamina tapers more gradually. In other respects there is a 

 close i-esemblance to J\ callinice. 



It is curious that P. antodyca, which is superficially so 

 much like P. swaitisonii, has a very different kind of scent- 

 scale. The lamina is ovoidal, broader towards the base. The 

 chitinous framework is very distinct, somewhat like that to 

 be found in the genus Mylothris. The apex is blunt ; the 

 fimbriae short, often wavy or twisted. The base, instead of 

 being furnished with long tapering processes as in P. swain- 

 sonii and other species of the genus, is prolonged into short 

 cornua shaped like claws or talons. In Pereute callinira we 

 get a form intermediate between P. antodyca and P. callinice ; 

 the laminae, which vary somewhat both in length and breadth, 

 have sides more nearly parallel than in P. callinice, but still 

 showing a distinct basal expansion. A curious point in this 

 species is the almost invariable asymmetry of the cornua, one 

 being short and claw-shaped, the other generally longer and 

 often angulated, as commonly in P. sivainsunii. This species 

 also possesses peculiar scales shaped like an Indian club. 



The disc in Pereute is moderate in size, that of /■*. antodyca 



