216 U.S. NATIONAL MUSEUM BULLETIN 257 



Male genitalia: Tegumen moderate, erected-triangular, narrow, 

 with a rounded top. Vinculum small, semicircular. Gnathos paired, 

 arms unequal, right, short and pointed, left, longer and obtuse. 

 Valva paired, upper pair (anellus lobes?) strongly narrowed, geniculate 

 at base, cucullus haiiy, elongate, moderate, curved throughout, more 

 so at top. Lower pair of valvae longer, rather narrow, bristly at top; 

 this pair is attached by an unpaired stalk to vinculum. Aedeagus and 

 anellus sclerotized, united at their bases, together forming a single 

 body, attached by a slender geniculate stalk to vinculum; aedeagus 

 porrect, narrowed, top slender and hooked upwards; anellus joined to 

 juxta which is shaped as a long median porrect process of anellus, top 

 curved downwards. 



Female genitalia: Sterigma not modified. Ostium bursae, a mem- 

 branous, suboval cup. Corpus bursae minutely aciculate. Bulla 

 seminalis longitudinally corrugated. 



Xestocasis erymnota Meyrick, 1917 



Figure 811 



Xestocasis erymnota Meyrick, 1917, Exotic Microlepidoptera, vol. 2, p. 62 (cf9, 

 Baco River, Mindoro). — Clarke, 1955, Catalogue . . . Microlepidop- 

 tera . . . Meyrick, vol. 1, p. 132. 



Distribution: Philippine Is., Mindoro. 



Male genitalia: Of the usual complicated type. Tegumen elongate, 

 narrowed. Uncus, a sclerotized short knob. Gnathos paired, asym- 

 metrical, left arm long, sinuate, with a dilated top, right arm, a small 

 stump. Anellus lobes, long sinuate rods, with a dilated, flattened 

 and bristly top. Upper pair of valvae, slender gently sinuate rods, 

 bristly along posterior half. Lower pair of valvae gently curved 

 downward, rather narrow, truncate. Aedeagus long, gradually nar- 

 rowed, little curved. 



Lectotype, male, herewith selected, is the male syntype, "Baco 

 River, Mindoro, M. 10.09," "Meyrick Coll.," slideBM 11349d^ (BM). 

 I owe the dissection of this specimen to the kindness of Mr. P.E.S. 

 Whalley, British Museum (Natural History). 



Lamachaera Meyrick, 1915 



Lamachaera cyanacma Meyrick, 1915 



Figure 812 



Lamachaera cyanacma Meyrick, 1915, Exotic Microlepidoptera, vol. 1, p. 338 

 (9, Mindanao, Mt. Apo). — Clarke, 1955, Catalogue . . . Microlepidop- 

 tera . . . Meyrick, vol. 1, p. 107. 



Distribution: Phillipine Is., Mindanao. 



