46 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
wing sordid white with a fuscous shade around termen and mottled 
with fuscous inwardly. Foreleg fuscous; tarsal segments narrowly 
banded with white; midleg similar to foreleg; hindleg ocherous white 
faintly irrorate with fuscous. Abdomen removed before description. 
Male genitalia slide 63—-Obr., 1963. Harpe triangular, very broad 
basally; cucullus narrow, bluntly pointed. Socii two broad, fleshy 
lobes. Uncus a short, digitate process. Transtilla very broadly ex- 
panded laterally, constricted before middle, then expanded; median 
section armed with many sharp teeth. Vinculum not coalesced. 
Tegumen about as long as harpe. Anellus a deeply concave plate, 
fused with base of harpe by a long sclerotized rod, the latter dentate 
along most of its length. Aedeagus stout, curved, terminating in a 
pair of sharp points; vesica armed with one large and numerous 
spiculate cornuti. 
Holotype: U.S. National Museum No. 69738. 
Type-locality: Costa Rica, Mount Poas. 
Distribution: Costa Rica. 
Described from the unique male holotype (May). 
In appearance similar to melanoleuca, but the dark basal patch 
does not extend across the wing as in that species, and there are 
pale yellow-green reflections, absent in melanoleuca. The genitalia 
of platina lack the strong hairpencil that is present in melanoleuca, 
and the median area of the transtilla is much broader and armed with 
many spines. The fused anellus and harpe are a distinguishing char- 
acter of platina. 
Ficure 24.—Irazona platina, new species: a, ventral view of male genitalia with left 
harpe and aedeagus removed; b, aedeagus. 
