S. Mahunka szerk.: Folia Entomologica Hungarica 49. (Budapest, 1988)

portion of this sclerite forming the ventral sclerotized thickenings on the wall of the ventral margin of the tenth segment appears to be attached to the hooks by articulation. Superior appendages long, slender, slightly outcurving in dorsal view. Inferior appendages in lateral aspect parallel with slightly narrowing apex, ventral aspect with basal portion wide, apical portion narrow bearing a pair of prominent teeth on the inner surface. Phallic apparatus rather complex with several more sclerotized filament-like rods inside the phallotheca and even inside the aedeagus. The dorsum of phallotheca developed into a process at least distally appears to be free and ending in a dorsally bilobed apex. In the dorsum the first sclerotized filament appears. The second unpaired shorter filament above aedeagus may represent the paramere. The lowest sclerotized filament gives the ventral strengthening of the long aedeagus and appears in the middle part as a double filament. The structure of genitalia is very similar to that of A. hamatus Ross, 1956 described from Southern China. The hook and the inferior appendages are different. The hook is long and slender in hamatus

, short and stout in caimoc. The inferior appendages have a single prominent peg-like process in hamatus and a pair of well-developed teeth in caimoc. Fifth sternite with a weak indication of the lateral ridge in hamatus and very pronounced in caimoc. Fork 1 absent on the hind wing of hamatus and present on caimoc. The apex of R^ indistinct in hamatus and clearly reduced in caimoc. On the basis of all these differences I have separated A caimoc as a distinct, new species. Like hamatus this new species belongs to Syn agapetus subgenus, "

rudis" group and "

mitis" subgroup according to ROSS's classification. However, in accordance with SCHMID's arguments species having long Sc and distinct apex of Rj present on hind wing belong to Synagapetus subgenus and species like this with short Sc and R, apex absent on hind wing either having or not an internal pouch in the fifth sternite belong to Agapetus s. str. So, according to SCHMID's position my species belongs to subgenus Agapetus s. str. I name this species according to the prominent hook on the tenth segment. Hook: cai moc in Vietnamese. Holotype ô. Tarn Dao, 1300 m, Vietnam, 11.X. 1986. leg. Oláh. Singled along the shore vegetation of the main stream. Paratype 1 g same data as for holotype. Deposited at the Zoological Department, Hungarian Natural History Museum, Budapest. Right pair of wings mounted as dry microscopic preparation. Caustic potash-treated abdomen and the remaining part of the body are stored in a single selfstanding, airtight vial filled with 70 % ethanol together with the untouched paratype. Agapetus barang sp. n. (Fig. 7) Male (in alcohol). General colour light brown. Wing membrane brown, hairs darker. Hyaline area on the fore wing not conspicuous, pterostigmal area well granulated. On hind wing Sc short ending at anastomosis, apex of Rj absent, fork 1 present. Length and largest width of fore wing 3.5-1.2, those of hind wing 2.6-0.8 mm. Fifth abdominal sternite with a well-developed, unmodified ridge and the sixth sternite with a long apicomesal process. Male genitalia. Ninth abdominal segment synsclerotized, subtriangular due to the long anterolateral apodeme. Tenth segment cuculliform basal and lower part more, caudal and dorsal part less sclerotized. Inside an apparently well-sclerotized sleeve enclosing the aedeagus visible. Later was pulled out and figured separately. Otherwise the whole phallic apparatus would be rather obscure to visualize. The sclerotized sleeve represents the interior sclerite of segment ten (NIELSEN 1957) and perhaps may be homologized with the sternite of segment ten (KIMMINS 1964). Phallic apparatus consists of the tube-like phallic apodeme and phallocrypt, deeply excised at dorsodistal end, the membranous phallobase and the distally upcurved and dilated aedeagus together with the heavily chitinized stout, unpaired paramere ending in an asymmetric right directed hook. Superior appendages long filiform. Inferior appendages about as long as segment ten, almost subrectangular. In ventral aspect with three median teeth and one larger tooth at the distal inner corner. Hind wing venation, structure of fifth and sixth abdominal sternites and the genital structure forming the long anterior apodeme on ninth segment and the hood-like tenth segment together with the complex phallic apparatus clearly relate this species to the Synagape tus subgenus, "rudis" group and "

rudis

" subgroup of ROSS (1956). However, on the basis of SCHMID's arguments the short Sc and R^ apex absent on hind wing this species and presumably the whole "

rudis" subgroup belongs to Agapetus s. str. The structure of phallic appa-