86 SPOLIA ZEYLANICA. 
Two large spots at the anterior margin 
before the apex ; at the hinder margin 
one such spot at the border of the cubi- 
tal bifurcation and another at the border 
of the anal cell. Legs clear brown to 
brown. Head brown-black . ceylonicum, n. sp. 
Perientomum chrysargyrium, n. sp. (Figs. 9, 48, 74, 101). 
Head dark brown; very long and compact hair on forehead and 
vertex, inclined in a bunch below and forwards and having a yellow- . 
ish brown colour. Eyes dark, large, with short, compact, and 
relatively stout pubescence. Antenne thin, about one-half the 
length of the fore wing, black brown, basal third yellowish brown, 
with rather close-set and long pubescence. Maxillary palp yellow- 
brown. Inner lobe of maxilla shown in fig. 101. 
Thorax black-brown above, mesonotum with gray-brown, shining 
scales. Legs more or less dark yellow-brown ; femora (except their 
apices), trochanters, and coxz clear brownish yellow, likewise the 
apices of the tibiz, of the first tarsal joints, and the second tarsal 
joints. The compact scaling of the femora and tibiz with a bright, 
yellowish silken sheen. The length of the anterior tibia is 0-47 mm. ; 
of the middle tibia 0°66 mm.; of the posterior tibia 1:3 mm. 
The lengths of the tarsal joints in millims. are: in the fore foot, 0:19, 
0:05, 0:05; in the mid foot, 0°25, 0-05, 0:06; in the hind foot 0°38, 
0:06,0°06. The ratio of the hind tarsal joints is therefore as 64: 1: 1. 
First hind tarsal joint with about 17 ctenidiobothria. Claws small 
(fig. 74) with a fairly acute tooth relatively far from the apex and very 
thin broad empodial appendix, which expands and rounds to a cir- 
cular form at the end. 
Membrane hyaline; pterostigma broad; m, discharges close 
before the wing apex. Scaling of the fore wing in the basal half, — 
with more oxless of a silvery lustre, to gray white with silken sheen, 
behind often with faint coppery hue. Apical half with bright yellow 
golden, behind at the base a narrower silver seam, the rest of the 
margin narrowly seamed with sammet black ; this black marginal 
seam is interrupted at the anterior margin by four silvery spots, at 
the posterior margin by two such spots ; marginal hairs of the apical 
half remarkably long, pale yellowish gray-brown. 
Hind wing hyaline, veins pale brown. Marginal hair very long, 
yellowish gray-brown. The narrow radial cell F is relatively broad. 
The point of ramification of 7, lies more or less near to that of m,, 
in one case the two points coincide in one of the two wings. 
Membrane of hind wing intense red iridescent to violet and green. 
