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Bulletin - United States National Museum

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MICROLEPIDOPTERA OF PHILIPPINE ISLANDS 215<br />

with a strong bronze gloss, posterior coxa, femur and basal fourth<br />

of tibia yellow whitish.<br />

Forewing lanceolate, narrow, pointed. Black, with a moderate<br />

anthracite gloss, cilia concolorous. Hindwing fuscous purple, cilia<br />

black with a suffused, faint whitish basal band.<br />

Male genitaha: Eighth tergite and sternite modified. Coremata<br />

large, at the foot of the 8th segment. Tegumen elongate, rather<br />

strong. Vinculiun slender, triangular, without saccus. Valva little<br />

curved, very slender, lanceolate, base dilated, cvicuUus rounded, shortbristled.<br />

Uncus slightly asymmetrical, furcate. Gnathos huge, irregular,<br />

asymmetrical-bicuspid, left top rounded, right short-hooked.<br />

Aedeagus pointed, sinuate, very slender and sclerotized.<br />

Female genitalia: Ovipositor moderately long. Apophyses, simple,<br />

slender rods.<br />

Sterigma represented by a subquadrate plate with a<br />

quadrate median incision of upper half occupying one third, and a<br />

triangular one over the whole breadth of lower edge. Lower half<br />

rather sclerotized, in center forming a narrow rim triangularly projecting<br />

forward. Ductus and corpus bursae membranous, bursa<br />

simple.<br />

Material examined: Luzon, Manila, AprU and May, 1924, genit.<br />

slides 5432 d', 55209 (R.C. McGregor). Mt. Apo, 70, 9.III.1945<br />

(J.G. Franclemont), 1 d^ (GUI). Mt. Makiling (Baker) Occidental<br />

Negros, La Carlota Cen., 24 (A.W. Lopez). Many specimens<br />

(USNM).<br />

Xestocasis (Meyrick, 1914)<br />

Key to the Philippine Species of Xestocasis<br />

1. Forewing with four pale transverse fasciae X. erymnota<br />

Forewing with only two such fasciae<br />

X. iostroat<br />

Xestocasis iostrota (Meyrick, 1910)<br />

Figures 321, 695<br />

Limnoecia iostrota Meyrick, 1910, Trans. Roy. Ent. Soc. London, p. 454 (Borneo,<br />

India).— Clarke, 1955, Catalogue . . . Microlepidoptera . . . Meyrick, vol.<br />

1, p. 175.<br />

Xestocasis iostrota.— Meyrick, 1914, Suppl. Ent., no. 3, p. 54 (Formosa).<br />

Distribution: India, Borneo, Tonkin, Formosa, Philippine Is.<br />

Material examined: Negros, Victorias, Saravia, Silar, on sugar cane<br />

{Saccharum dulce), VI-IX.1928, genit. slides cT 9, no. "A.B. June 17,<br />

1930," 6 specimens (USNM). Mindanao, Davao Prov., east slope<br />

of Mt. McKinley, 3000 ft., IX. 1946 (CNHM Philippine Exped.<br />

1946-47, H. Hoogstraal), 2 9.

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