MICROLEPIDOPTERA OF PHILIPPINE ISLANDS 99 



Stenarchella, new genus 



With the external characters and neuration of Proactenis Diakonoff, 

 1941, but with a quite different type of male genitaha. 



Tegumen rather high, cyHndrical. Uncus strong, sclerotized, a 

 simple hook with a rounded top. Socius moderate, free, pending. 

 Gnathos strong, arms converging and porrected, corrugated, point 

 pending, obtuse, triangular, a small additional blade arising from 

 the bent of the pendmg portion. Transtilla, a moderate, trapezoidal 

 band. Vinculiun small, subtriangular. Valva of Protarchella type, 

 but with a strongly dilated basal half and a more slender cucullus. 

 Sacculus 2/3, its apical hook blunt and strong. Aedeagus httle curved, 

 rather broad, top Anth a short upper and a long lower lip. 



Tjnpe species: Stenarchella eupista, new species. 



Apparently nearest to Cornuticlava Diakonoff, 1969, but less 

 speciahzed. 



Stenarchella eupista, new species 



Figures 121-123,574 



Male, 20.5 mm. Head white, slightly touched with fuscous. 

 Antenna white, median segment with a large black spot on upper 

 side, not reaching apex nor lower edge, terminal segment with a black 

 median ring. Thorax whitish, with a pale purple gloss. Abdomen 

 white. 



Forewing suboval, slightly dilated, broadest at 3/4, costa little 

 curved, apex rounded, termen rounded, little oblique, with slight 

 raised scale tufts in disc. Snow white, markings formed by short 

 and slender strigidae along raised veins, more or less interrupted 

 between veins, therefore appearing grey. A small transverse mark 

 beyond base of costa, preceded and followed by a minute dot; a large 

 transverse and slightly undidate streak at 1/5 reaching to fold; 

 transverse fascia formed by three or four transverse strigulae or dots 

 on costa, preceded by two distant costal dots, and followed by one 

 more dot; these dots emitting almost vertical faint strigidae, becoming 

 longer on posterior part of wing, to form together a triangular trans- 

 verse fascia, strongly narrowed below, anterior edge very oblique, 

 posterior slightly so, end on dorsum before tornus; costal patch 

 formed by a small quadrate costal dot before apex, connected with a 

 larger subcostal one before preceding which is also connected by two 

 lines with costa; a slender wedge-shaped preterminal mark, little 

 obUque, resting with acute base on termen just above tornus; a faint 

 zigzag preapical streak, from costa to before middle of termen; a 

 subtriangular spot on middle of dorsum, reaching above middle of 

 wing, but not touching transverse fascia. Cilia snow white with a 

 submedian row of black dots. 



