. d 9 Fig. 12. Head of N. nigrinus male and female. without spots. Eyes round, nearly touching above the frontal triangle, bare, dark greenish, slightly metallic, with a reddish violet band below the middle on the line dividing the large and small facets. Thorax black, shining, somewhat punctate, slightly and very short haired: the pale humeral callus small, and the stripe going to the wing-root, narrow, both brownish yellow. Abdomen black, more or less bluish, somewhat punctate and somewhat dullish in front but shining be- hind. V^enter black. Femora black, broadly white at the tips, tibiae

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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera