Trigonomiminae
References: Artigas, J.N. & Papavero, N. (1989): The American genera of Asilidae (Diptera): Keys for identification with an atlas of female spermathecae and other morphological details. III. Key to the genera of Trigonomiminae Enderlein, with description of a new genus and species. - Boletin de la Sociedad de Biologia de Concepcion 60: 35-41; Concepcion.
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1.
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Antenna with 3 flagellomeres . . . . . Haplopogon Engel, 1930
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| Antenna with 1 or 2 flagellomeres.
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»2
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2.
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Antenna with first flegellomere elongate, spindle-shaped, two or more times combined length of scape and pedicel . . . . . Holcocephala Jaennicke, 1867
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| Antenna with first flegellomere ectremely short, small, dilated, bulb-like, drawn out apically into an extremely long, bristle-like style, longer than the head.
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»3
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3.
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First flagellomere twice as long as combined length of scape and pedicel and pollinose. Frons without longitudinal sunken area. Face divergent below. Head in lateral view rounded below antennae and obliquely flattened above, the facial vrease specially deep. Upper section of M2 very short or fused to M3 . . . . . Orrhodops Hull, 1958
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| First flagellomere short, nearly orbicular, considerably larger and wider than pedicel. Frons with a longitudinal sunken area and upper face with a longitudinal furrow. Upper section of M2 long . . . . . Bromleyus Hardy, 1944
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Contents: © Jorge N. Artigas et al., Fritz Geller-Grimm, 2003
Layout & images: © Fritz Geller-Grimm, 2003