( cxxi ) 



The base is squared and the apex sharp. In M. malenka also 

 the scent-scales are scanty. They are like those of M. jyy^rha, 

 but nari-ower in proportion. The apex is still sharper, and 

 makes a distinct angle with each side of the lamina. The 

 disc, which is somewhat smaller in proportion than that of 

 M. pyrrha, has an evident proximal aperture. 



In M. lorena and M. lypera the scent-scales are fairly 

 numerous. They are of the P. calydonia and P. dei)wphile 

 type. The sides of the lamina in 31. lo7-ena diverge slightly 

 towards the distal border ; the disc is moderate in size, round- 

 ish or oval. Among these scales I have found one specimen 

 of a scale presenting a vexy different appearance. It is large, 

 long and narrow, the proximal two-thirds tapering gradually 

 into a short, wide footstalk, which ends in a small oval disc. 

 The distal border of the lamina is very slightly convex, and 

 the fimbriae are rather short. The scale has very much the 

 appearance of a Euterpe plumule, though the lamina is larger 

 and the disc smaller than in any species of that genus known 

 to me. As in all cases of scales unique among their sur- 

 roundings, the doubt arises as to whether it really belongs to 

 the specimen from which it was taken, or whether it has acci- 

 dentally found its way there from an extraneous source of 

 origin. M. lypera has a scale like that of M. lorena, but with 

 the lamina shorter and squarer. The sides are nearly parallel 

 and the fimbriae long and wavy. The scales seem to vary 

 somewhat in breadth. One scale has been observed which is 

 vei-y much larger tban the usual form ; the sides of the lamina 

 diverge widely from a narrow and somewhat squared base, 

 the distal border is segmental, not angulated, and the fim- 

 briae are much as in the usual form, being long, thick and 

 wavy. 



The scent-scales of the African, or true Mijlothris, are like 

 one another, but like nothing else in the world except perhaps 

 a dice-box or a lady's corset. The lamina in every species 

 shows lateral compression ; this is specially well-marked in 

 M. poppea, M. phileris and 3f. agathina ; less so in M. jacJcsoni. 

 The proximal half of the lamina contains about twelve to 

 fourteen prominent chitinous ribs, roughly parallel, and con- 

 nected latex^ally with one another by cross-pieces, the whole 



