84 SOPLIA ZEYLANICA,. 
Type: P. trichopteryx, Hag., 1859. 
Wings more or less acuminate. The first radial branch (7,) of 
the hind wing arises between the origins of m,, and m, ; only in 
isolated cases does it arise at the insertion of m, (one example each 
of P. chrysargyrium, n. sp., and P. trichopteryx, Hag., 1859; cf. Hagen, 
Ent. Mo. Mag., II., 1865, p. 152, under P. morosum, Hag., and Nepti- 
culomima mortua (Hag.) in the present work. In the fore wing r, 
(the hinder border of the pterostigma) is fused with the peduncle 
of the radial fork for a short distance or touches it at one point. 
Claws with one tooth before the apex. Scales fusiform with 
more or less produced apex (figs. 46, 48-50, 67), the cover 
scales larger and slenderer, sometimes (P. triste, Hag.) straight 
cut at the end (with rounded angles) or faintly emarginate (fig. 63), 
sometimes also (P. Greeni, n. sp.) the ground and cover scales are 
more or less concave at the end (fig. 53). The three ocelli are far 
apart from each other. Forehead and vertex with very long and 
close-set hairs. Antennary joints of the flagellum relatively long. 
Suture of vertex always distinct. 
{ think it very probable that the Thylax madagascariensis, Kolbe 
(Berlin, Entomolog. Zeitschr., Bd. X XIX., 1885, p. 184, fig. la, 6, c) 
belongs to the Perientomine, probably to the genus Perientomum 
or to an allied genus. It seems that Kolbe had before him a speci- 
men from which the scales had been lost. The figures and descrip- 
tion are entirely in favour of this assumption. Unfortunately the 
type has been lost and I therefore leave the question undecided 
until new material from Madagascar clearsit up. (See p. 77, foot- 
note 1). 
TABLE OF SPECIES OF PERIENTOMUM. 
1. Wings very strongly acuminate. Pte- 
rostigma narrow. Fore wing brown. 
Legs*brown-yellow .. .. acutipenne, n. sp 
Wings moderately acuminate Me aay? 
2. Fore wing silvery and golden, only a 
narrow marginal seam in the apical 
half black, silver spotted. Pterostig- 
ma broad, basal half silvery, terminal 
half golden oe: . chrysargyrium, n. sp 
Fore wing with dark spots or chiefly dark 3. 
3. Fore wing with dark spots, dark pattern 
or dark ground interrupted by exten- 
‘sive golden or silver or both golden 
and silver spots Ay Ale Bs 
