. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Peter Zwick & Tatyana Arefina: Blephariceridae of the Russian Far East 339 Nearctic Bibiocephala belong to a single species, B. granáis Osten-Sacken, 1874, which is widespread in western North America (HOGUE 1982). The number of Asian species is uncertain, see under B. komaensis Kita- kami. 1950. We studied abundant material of B. maxima, B. infuscata, B. granáis as well as some larvae of B. komaensis. We summarise our knowledge in keys, which replace formal des
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Peter Zwick & Tatyana Arefina: Blephariceridae of the Russian Far East 339 Nearctic Bibiocephala belong to a single species, B. granáis Osten-Sacken, 1874, which is widespread in western North America (HOGUE 1982). The number of Asian species is uncertain, see under B. komaensis Kita- kami. 1950. We studied abundant material of B. maxima, B. infuscata, B. granáis as well as some larvae of B. komaensis. We summarise our knowledge in keys, which replace formal descriptions of the previously un- known larva of B. maxima. Keys also contain supple- mentary details on adults and pupae. There are excellent figures of male genitalia of B. granáis (HOGUE 1982, reprinted 1987) and of B. infuscata (KlTAKAMl 1937), but dististyle structure of B. maxima in the existing fig- ure (BRODSKY 1954) is confusing. We draw and com- pare the closely related Asian species (Figs. 3, 4), mainly to facilitate a decision on possible synonymy be- tween B. komaensis and B. maxima, should fresh Ko- rean material become Fig. 3: Bibiocephala infuscata (a, b) and B. maxima (c, d). a. c, apical views of left dististyle; b, d, left dististyle and apex of tegmen in dorsal view. All to same scale. Key to all known Bibiocephala-species Adult males (B. komaensis (Kitakami) not known) 1 Hypopygium elongated, its anteroventral margin po- sitioned much in front of anterior margin of tergite 9; anterior lobe of dististyle strongly spinose; inner dististyle with erect basal lobe on outside and simple band-shaped apex which is gently curved back; inner hypopygial sclerites partly rotated, penis filaments prolonged B. granáis Osten-Sacken 1' Hypopygium not elongated, anteroventral margin level with anterior margin of tergite 9; anterior lobe of dististyle finely pubescent; inner dististyle with- out basal lobe; inner hypopygial sclerites and penis filaments
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