. Bulletin - United States National Museum. Science. MEOAPODINAE ROBBER FLIES OF THE WORLD 421 Genus Senobasis Macquart Figures 245,675,1276,1286,2107,2131,2165 Senobasis Macquart, Dipteres exotiques, vol. 1, pt. 2, p. 52, 1838. Type of genus: Senobasis analis Macquart, 1838. Desig- nated by Bromley, 1934, the first of two species. Stenobasis Agassiz, Nomenclator zoologicus . ., Index, p. 338, 1846. Emendation. Astylium Rondani, Nuovi Annali Sci. Nat. Inst. Bologna, ser. 3, vol. 2, p. 185, 1850. Type of genus: Astylium claviger Rondani, 1850, by montypy. Lochites Schiner, Verh. Ges.
. Bulletin - United States National Museum. Science. MEOAPODINAE ROBBER FLIES OF THE WORLD 421 Genus Senobasis Macquart Figures 245,675,1276,1286,2107,2131,2165 Senobasis Macquart, Dipteres exotiques, vol. 1, pt. 2, p. 52, 1838. Type of genus: Senobasis analis Macquart, 1838. Desig- nated by Bromley, 1934, the first of two species. Stenobasis Agassiz, Nomenclator zoologicus . ., Index, p. 338, 1846. Emendation. Astylium Rondani, Nuovi Annali Sci. Nat. Inst. Bologna, ser. 3, vol. 2, p. 185, 1850. Type of genus: Astylium claviger Rondani, 1850, by montypy. Lochites Schiner, Verh. Ges. Wien, vol. 16, p. 671, 1866. Type of genus: Dasypogon ornatus Wiedemann, 1819, by original designation. Preoccupied Hymenoptera, 1S57, and Aves, 1859. Astylum Kertfsz, Catalogus dipteroruni . ., vol. 4, p 83 1909. Emendation. Stenobasis Kertesz, Catalogus dipterorum . ., vol. 4, p. 123, 1909. Emendation. Loohitomyia Brethes, Rev. Chilena Hist. Nat, Santiago, vol. 28, p. 105, 1925. Unnecessary change of name. Large flies which can be readily identified from the clavate antenna, the very prominent protibial spur and spine, and the basitarsal flange, associated at the same time with a 1-segmented palpus and the open marginal cell. It is a distinctive Neotropical genus, with elon- gate, sometimes slightly clavate abdomen. Length 15 to 25 mm. Head, lateral aspect: The head is comparatively short, the face short above, becoming gradually longer below; the occiput is scarcely visible in profile and only over the middle and lower portion. The lateral occipital margin is slightly concave, and the pile begins well away from the eye margin and covers the entire remainder and consists of numerous, long, slender, bristly hairs. At the upper eye corners and behind the occiput on each side are 1 or 2 slender bristles. The proboscis is elongate, laterally compressed, bluntly pointed, with a prominent, dorsal carina arising abruptly at the basal f ourth and continuing beyond the middle. Basal
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