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. 62 U.S. NATIONAL MUSEUM BULLETIN 257 Sycacantha potamograplia, new species Figures 72, 534 Male, 21 mm. Head and thorax dark fuscous, densely marbled and spotted with pale ochreous, lower half of face white (palpi missing) Antenna fuscous, scape dark fuscous, with a broad pale ochreous apical ring. Abdomen dark fuscous, venter pale ochreous. Forewing broad, rather dilated, costa gently curved anteriorly, distinctly curved posteriorly, slightly prominent at 2/3, apex obtusely rectangular, termen straight, vertical, curved below. Pale ochreous, marbled and dusted with blackish fuscous and with lilac. Markings limited, tawny olive, broadly edged with blackish. Basal patch indicated by a basal and a marginal, rather well-defined fasciae; basal fascia with a strong median projection, marginal before 1/4, traversed by two short streaks with truncate ends, one above cell, another in fold; on costa this fascia extended by a short blackish marginal streak; transverse fascia interrupted, blackish, with a rather large subquadrate or semioval spot on middle of costa and a smaller conspicuous black, obliquely oval spot beyond cell, with two digitoid smaller spots between these posteriorly; costa beyond basal patch with eight pairs of white marks, three anterior little oblique, eighth vertical; fourth to eighth pairs connected below with a broad, almost horizontal leaden fascia, curved downward before apex, streaked with whitish and with pale ochreous ohve; costa posteriorly between white marks and apex, black; an ill-defined very irregular fascia of little obscured ground color running straight from above 1/3 of dorsum to well below 2/3 of costa, thence wider, but parted by a blackish, very irregular line; this line flanked by similar paler, lilac-leaden lines, to termen above tornus; an irregular, dark fuscous mark beyond upper half of preceding fascia, edging the leaden streak below, on some veins traversed by tawny-olive longitudinal streaks, jutting out anterad, viz., along veins 5, 7 to 9; upper edge of termen with a narrow, blackish streak; dorsum with five black, marginal streaks, separated by paler, above these strongly clouded with dark grey and fuscous. Hindwing dark fuscous, with pale base and a darker subbasal shade, cilia along dorsum pale ochreous. Male genitalia similar to those of Sycacantha escharota (Meyrick), but with the top of tegumen and uncus represented by a strongly separated, transversely elongated body, with uncus forming an apical prominence on top of this. Socius moderate, clavate, pending, top bristly; gnathos, a transverse horizontal band. Valva similar to that in S. escharota. Material examined: Mindanao, Zamboanga del Sur, 24 km NW of Milbuk near Lebak, 210-240 m, 8.VIII.1958, light trap (H.E.
MICROLEPIDOPTERA OF PHILIPPINE ISLANDS 63 Milliron), 1 cf, paratype, genit. slide 5320 (BMH). East Borneo, Balikpapan, 50 m, 18.X.1950, Mentawir River (A.M.R. Wegner), 1 cf, holotype, genit. slide 4575 (LM). Rather distinct from S. escharota by the absence of well-defined dark terminal and dorsal patches; characteristic by the presence of a postmedian discal black spot. Sisona Snellen, 1901, new status Sisona albitibiana Snellen, 1902 GraphoUtha (Sisona) albitibiana Snellen, 1902, Tijdschr. Ent., vol. 44, p. 69, pi. 5, fig. 2, 2a, b, c (cf ?), Java (part: cf 18 mm, not cf 15.5 and 16.5 mm, not 9). To prevent further confusion, a lectotype of this species is selected herewith. It is the unique male specimen, the type of the original colored figure, labelled as follows. "W. Java, Depok, 1886, cf" (in Piepers' hand?), "G. (Sisona) Albitibiana m." (in Snellen's hand), "<strong>Museum</strong> Leiden. GraphoUtha albitibiana. Det. Snell." slide 2629. My lectotype label. Three more syntypes of the original series belong to Sycacantha inodes perspicua, new subspecies, described above. Bactra Stephens, 1834 Key to the Philippine Species of Bactra 1. Males 2 Females 5 2. Valva short and rounded, cucullus with large marginal spines (subgenus Nannohactra) B. phaulopa Valva not thus (subgenus Chiloides) 3 B. coronata 3. Sacculus rounded, corona formed by long equal spines . . . . Sacculus not thus 4 4. Sacculus with a conical lower (rostral) extremity, ending in a cluster of curved spines B. orbiculi minax Sacculus with an oblique transverse series of spines B. venosana 5. Sterigma weak, aciculate (subgenus Nannohactra) B. phaulopa Sterigma developed, more or less sclerotized (subgenus Chiloides) .... 6 6. Sterigma, two oval plates joined medially B. coronata Sterigma more or less Y-shaped B. venosana Subgenus Chiloides Butler, 1881 Bactra (Chiloides) coronata D'akonoff, 1950 Figure 535 Bactra coronata Diakonoff, 1950, Bull. British Mus. Nat. Hist., Ent. ser., vol. 1, p. 286, pi. 5, fig. 17 (&, Java). Bactra (Chiloides) coronata.— Diakonoff, 1956, Zool. Verh., no. 29, p. 33, figs. 34-36 (cf 9, Java, Borneo, Philippine Is.); 1964, Zool. Verh., no. 70, p. 37.
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Microlepidoptera of the Philippine
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MICROLEPIDOPTERA OF PHILIPPINE ISLA
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Appendix 1 Selection of Lectotypes
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Appendix 2 List of Selected Lectoty
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Figures 370-373.—Male genitalia o
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Index of Latin names of Food-plants
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