80 U.S. NATIONAL MUSEUM BULLETIN 257 



obliquely continued across wing as a slightly sinuate transverse 

 fascia, dilated in middle, attenuated to an acute point at end which 

 is below fold well beyond middle of wing; an irregular central patch 

 from middle of costa, oblique, to below cell before its lower angle; 

 anterior edge concave, posterior with two posterior processes, one 

 from middle, slender and acute, another from lower end, thicker; 

 posterior half of costa with five pairs of short, white strigulae, first 

 and second pairs approximated; ocellus formed by two rather short 

 leaden-metallic vertical streaks, enclosing two points and a crescentic 

 longitudinal mark in between, the latter interrupting posterior metal- 

 lic streak below its middle; ocellus crowned by a circular large mark 

 and preceded by a large triangular spot, its extended acute anterior 

 point touching lower end of transverse fascia; these dark markings 

 strewn with scales of ground color; a curved, outwards-concave line 

 from apex to below middle of termen, with two transverse bars below; 

 a streak along dorsum from base to middle, before end connected 

 with marldngs in disc; followed by three dorsal dots. Cilia (damaged) 

 tawny orange, a deeper subbasal band, a black bar in apex. 



Hindwing glossy light fuscous grey purple, cilia concolorous. 



Female genitalia: Ninth tergite sclerotized. Anal lobe broad and 

 rounded, lower extremity forming a slender process. Lamella ante- 

 vaginaUs represented by a narrow sclerotized and U-shaped rim; 

 lamella postvaginalis triangular, upper edge with an obtuse, aciculate 

 prominence, lower edge with a point flanked by excavations. Col- 

 liculum and cestum sclerotized, with a median split and two points 

 at lower end. Ductus bursae short. Signa two, almost similar, 

 finely scobinate. 



Material examined: Aiindanao, Davao Prov., east slope of Mt. 

 McKinley, 7000 ft., 22.IX.1946 (CNHM Philippine Zool. Exped. 

 1946-47, H. Hoogstraal), 1 9, genit. slide 5730. 



A distinct species, characteristic by the yellow-orange ground 

 color and the produced apex of forewings. 



Costosa, new genus 



Head with loosely appressed scales, side tufts on vertex rather 

 long, pressed together and forming a rising keel. Antenna hardly 

 thickened, minutely ciliate in male. Palpus moderate, subascending, 

 almost porrected, slender at base, median segment short, rather 

 slender, dilated towards apex by short appressed scales, terminal 

 segment short, rather slender, drooping. Thorax with a double 

 posterior crest. 



Forewing with cell abruptly narrowed towards base along basal 

 half. Vein 2 from slightly beyond 3/4 of cell, 3 from angle, approx- 

 imated to 4, 7 separate, to termen, 11 from beyond middle, parting 



