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Males 

1.         Tip of subgenital plate rather broad, with sharply pointed paraprocts . . . .Ostrocerca trucata

            Tip of subgenital plate slender, divided medially by rather deep notch; spur on paraprocts . . . . .             . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .O. albidipennis

Females

1.         Sternite 7 lacking sclerotization, its hind margin not produced; margin of 8th sternite somewhat             produced and broadly and almost rectangularly excavated. . . . . . . . . . . Ostrocerca truncata

            Sternite 7 somewhat sclerotized along its hind margin, at least near the middle (inconspiculous             in O. albidipennis). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O. albidipennis

        

 

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