Synopsis of the Families And Genera of North American Diptera: Exclusive of ...
Synopsis of the Families And Genera of North American Diptera: Exclusive of ...
Samuel Wendell Williston
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Antennae broadly separated. Eyes bare. Ovipositor of the female composed of two slender diverging lamellae. Three submarginal cells. Rhynchocephalus HiRMOKBURA Meigeu, Syst. Beschr. II, 132, 1820. RnTNCHOCEPHALUB Fischer, Mem de la Soc. imp. d. natur. de Mos- 6ou, I, 217, 1806. MIDASID^.. Rather larger to very large, thinly clothed or bare, elongate flies. Neuration complicated ; the basal cells long ; the fourth longitudi- nal vein always terminating at or before the tip of the wing. An- tenna...e elongate, the third joint flattened, and composed of several distinct segments. Ocelli wanting. Proboscis with fleshy labella. Empodia very little developed, not pulvilliform. Larvae found in decaying wood, etc., probably carnivorous. 1. Terminal segment of the female abdomen with a circlet of spines. 2 Terminal segment without circlet of.spines. Midas 2. A small cross- vein runs ihto the hind margin of the wing between the anal cell and the tip ; hind tibiae of female with spurs. ECTYPHUS No such small cross- vein ; hind tibiae ( 9 ) without spurs.
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