( t:iii ) 



with an equally small disc, is that of T. eris; the footstalk 

 also in this species is unusually long. T. agoye, a noteworthy 

 species in other respects, has a remarkable plume-scale. The 

 lamina is long and narrow with an expanded and rounded base. 

 The disc is large, and in preparations appears to be set at 

 right angles to the lamina. The fimbriae are few — not more 

 than twelve, which is about half the usual number. 

 Ordinary scales with orange pigment, process-less like those 

 of T. evenina, etc., occur in T. affoye ; but no lateral curva- 

 ture has been detected in them hitherto. 



The plume-scale of Herpaenia eriplda, as might be expected, 

 is like that of a Teracolus. It may be described as a some- 

 what shortened and thickened version of that of T. eris. The 

 footstalk is long, as in that species. 



We now come to the genus, or group of genera, known as 

 Eronia. With respect to this assemblage it is interesting to 

 observe that its sub-division into Nepheronia, Leuceronia and 

 Eronia proper, which was made on other characters, is entirely 

 borne out by differences in the plume-scales. It would be 

 quite easy to determine from a single specimen of these scales 

 to which of the three genera its possessor belonged, and in 

 many cases it would be possible to pronounce at once upon 

 the species. In Nepheronia, which is entirely Eastern in 

 distribution, the plume-scale is characteristically long and 

 narrow, with an extremely sharp apex. In a few species the 

 breadth of the lamina is uniform ; in others the lamina 

 tapers more or less gradually fi-om base to apex. In 

 most the base is rounded, in one or two it tends to be 

 squared ; in the Moluccan form N. argolis it is ogee-shaped. 

 A curious feature in several of the species is a clear area 

 occupying the breadth of the lamina, a little proximal to 

 the apex. Both distally and proximally to this area the 

 lamina is densely granular, giving the appearance of pigmen- 

 tation. The disc is usually small, in some species very small ; 

 but in K. pliocaea and one or two other of the island forms it 

 is comparatively large. A circular mark is often apparent, 

 which may be the usual proximal orifice of the disc, or may 

 possibly denote the insertion of the footstalk. 



A remarkable fact about the scent-scales in Nepheronia is 



