196 U.S. NATIONAL MUSEUM BULLETIN 257 



Itnma poecilostoma, new species 



Figures 291-293, 670 



Male and female, 18 mm. Head pale yellowdsh fuscous with some 

 white opalescence, face pale yellow. Antenna pale yellow above, 

 ochreous below, ciliations under 1. Palpus yellowish white, median 

 segment \dth a narrow oblique transverse streak from base above to 

 outer edge, this edge broadly opalescent lilac grey to apex, apex lilac 

 grey, median (remaining) portion of upper edge with a bright yellow 

 semioval spot. Thorax pale yellowish fuscous, mLxed mth pale 

 yellow hau'-scales. Abdomen fuscous, venter bright yellow in male, 

 whitish in female. Posterior tibia in male beneath with a dense and 

 broad scale brush, white, tipped with grey. 



Forewing broad, subtruncate, costa rather straight, gently bent and 

 prominent at 3/4, apex rounded, termen convex, little oblique. Pale 

 fuscous grey with a lilac purple gloss, densely mixed with pale yellow 

 hair-scales and appearing yellowish grey; colors on anterior half of 

 wing coarser, on posterior more evenly mixed. A bright yellow mar- 

 ginal very narrow streak along anterior half of costa, edged below by a 

 suffused narrow purphsh-grey streak; posterior extremity of this 

 marginal streak emitting a rather narrow bright yellow transverse 

 line to just above 3/4 of dorsum; this line curved outwardly, but in 

 center of disc abruptly pressed inwardly, in order to half encircle a 

 suffused dark brown discal dot before 2/3; a faint yellowish suffusion 

 on dorsum forming the end of this fascia; a slender obhque and wedge- 

 shaped mark from 3/4 of costa, limited by the course of vein 11; a 

 somewhat lighter yellow line along posterior part of costa, dilated in 

 apex, slightly narrowed and regularly serrate along termen, followed 

 by a dark brown marginal line filling out the serrations. Cilia fuscous 

 with a dark fuscous basal line and slightly paler tips. 



Male genitalia: Tegumen moderate, rather broad, slightly con- 

 stricted below the top which is thickened and rounded. Vinculum 

 with rectangular top with a small triangular median prominence. 

 Valva thick, with several complicated longitudnial folds, sacculus 

 with an apical inwards-directed straight obtuse process ventrally, and 

 a long sclerotized rod inwardly, at the end curved inwards and furcate. 

 Cucullus top obliquely oval. Anellus lobes long, curved, almost reach- 

 ing top of tegumen. Aedeagus long, sinuate, base bulbous. Two pairs 

 of coremata. Eighth segment modified. 



Female genitalia: Ovipositor rounded, floricomous. Ostium, a 

 rounded cup, hairy inside. Ductus bursae extremely long, upper 

 part sinuate, with a strong cestum, lower part strongly tortuous, 

 almost plaited. Corpus bursae finely granulate on top and with a 

 stronger granulate round patch obUquely opposite base of ductus. 



Material examined: Luzon, Mt. Makiling (Baker), 1 cf, holotype, 

 genit. slide 5165; 1 9, allotype, genit. slide 5 174 A. 4 cf , 4 9, paratypes 



