Review of the genus Scaeosopha Meyrick, 1914 (Lepidoptera, Cosmopterigidae, Scaeosophinae) in the world, with descriptions of sixteen new species Author Li, Houhun College of Life Sciences, Nankai University, Tianjin 300071, China lihouhun@nankai.edu.cn Author Zhang, Zhiwei College of Life Sciences, Nankai University, Tianjin 300071, China & College of Forestry, Shanxi Agricultural University, Taigu, Shanxi 030801, China Author Sinev, Sergey Yu. Zoological Institute of Russian Academy of Sciences, St. Petersburg, Russia text Zootaxa 2012 2012-05-23 3322 1 34 journal article 1175-5326 Scaeosopha trigonia Li et Zhang sp. nov. ( Figs. 28 , 51 ) Description. Adult ( Fig. 28 ): Wingspan 14.5 mm. Head whitish-yellow, scale tuft behind compound eye yellow, black along outer margin. Antenna whitish-yellow, flagellum annulated with brown. Labial palpus with second segment whitish-yellow, third segment whitish-yellow with black scales on ventral surface. Thorax and tegula dark-brown on basal half, grayish brown on distal half. Forewing yellowish-white, overlaid with black and pale yellowish-brown spots and patches; distinct rounded black spots at middle of cell on anterior margin, at end of cell and at 2/3 length of fold; cilia yellowish-white, mixed with yellowish-brown basally. Hindwing and cilia yellowish-brown. Legs dirty whitish-yellow, fore and mid tarsi black on outer surface. Abdomen dark-brown, each segment deep-yellow posteriorly. Male genitalia ( Fig. 51 ): Brachia of uncus wide at base, contracted slightly at middle, expanded distally, rounded at apex, with a large sclerotized triangular process at basal 1/3. Valva broad and short, oval, with numerous commalike processes on ventral half; valvella club-shaped, longer than valva, sparsely setose, narrowed medially, expanded in distal 1/3. Phallus extremely long, more than eight times of valva in length, uniformly wide, coiled at middle, weakly sclerotized; cornutus absent. Female: Unknown. Type material. Holotype ♂ , INDONESIA : Sulawesi Utara [ 0°37' N , 123°58' E ], Dumoga-Bone N [ational]. P[ark]., “Hog’s Back” Camp Lowland forest , 492 m . , ix.1985 , R. Ent. Soc. Lond. , Project Wallace, BM 1985-10, BMNH Microlep. slide no. 30999, Houhun Li ( BMNH , London). Paratypes : 4 ♂ , same data as for holotype, except for 2 dated x.1985 . Distribution. Indonesia . Diagnosis. This new species is similar to S . incantata Meyrick in the male genitalia, but can be separated from it by the brachia of uncus with a sclerotized triangular process at basal 1/3 and the tegumen slightly cancave on anterior margin. In S. incantata Meyrick , the brachia of uncus do not possess a process and the tegumen is deeply concave on anterior margin ( Fig. 42 ). Etymology. The new specific epithet is derived from the Latin trigonius = triangular, in reference to the triangular process at basal 1/3 of the uncus brachium.