. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. â¢â , i ⢠^\ ' ⢠â¢â 4 rr4&:. DIPTERA OF NORTH AMERICA. aen. IV. STENOPTERIIVA Macq. [part UI. Charact.âDoili/ long and narrow. JJetid aliuost like that of Oacus; front of a considerable and equal brbadth, somewhat projecting in profile ; face somewhat exuavuti'd in profile, perpemliculur towards the somewhat upturned anturidr edge of the mouth, or but little projei-ting; the shallow aulennul foi,(E long and narrow, not distiiicll/ separated from the convex middle portion of tho lace ; the la
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. â¢â , i ⢠^\ ' ⢠â¢â 4 rr4&:. DIPTERA OF NORTH AMERICA. aen. IV. STENOPTERIIVA Macq. [part UI. Charact.âDoili/ long and narrow. JJetid aliuost like that of Oacus; front of a considerable and equal brbadth, somewhat projecting in profile ; face somewhat exuavuti'd in profile, perpemliculur towards the somewhat upturned anturidr edge of the mouth, or but little projei-ting; the shallow aulennul foi,(E long and narrow, not distiiicll/ separated from the convex middle portion of tho lace ; the lateral portions of the face very narrow; cli/i>tiis very large; eyes large; cheeks not very broad; occiput only moderately turgid. Ariteumr: The first two joints >hort; the third narrow and very long, generally reaching a littla below tho anterior edge of the mouth; arista apparently bare, or with a pubescence which is so short as to be almost impeiceptible. Thorax long and narrow ; the transverse suture runs across the whole dorsum in the shape of a shallow depression; viewed laterally, tho thorax appears remarkably attenuated towards its anterior end, as the pectus is truncated obliquely in front; scutillum with four bristles. AhJomin remarkably narrow ; the first segment more or less prolonged in the male. Feet slender; the fore cox» very long, Inserted remarkably near the coUum, and unusually movable at the point of insertion Wi>i()s rather narrow ; stigma long and narrow ; small crossvein oblique, inserted more or less beyond the mitldle of the long discal cell; second section of the fourth longitudinal vein straight; pos- terior angle of the anal cell rounded ; the picture of the wings consists chiefly in a rtark border of tiie costa, reaching from the bafls of the stigma to the apex of the wing, and in the darker col- oring of the entire anterior basal cell, to which, in most of the species, is added a brown cloud along the posterior crossvein. Th
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectd, booksubjectinsects
