. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. DISCOCERINA. 145 the base brownish-red. At the costal margin of the wing there is a broad, deep-black band, running from the base to the tip of the third longitudinal vein ; its posterior limit runs from the base of the wing along the middle of the discoidal cell to nearly the pos- terior transverse vein, recedes from it suddenly almost to the third longitudinal vein, follows this vein first at a little, then gradually at a greater distance, and lastly turns to its tip; the posterior part of the win
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. DISCOCERINA. 145 the base brownish-red. At the costal margin of the wing there is a broad, deep-black band, running from the base to the tip of the third longitudinal vein ; its posterior limit runs from the base of the wing along the middle of the discoidal cell to nearly the pos- terior transverse vein, recedes from it suddenly almost to the third longitudinal vein, follows this vein first at a little, then gradually at a greater distance, and lastly turns to its tip; the posterior part of the wing is rather dull glassy, and almost grayish at the axillary angle; the veins in the latter are brownish, those in the blackish parts of the wing black. The place of this species in the system is very deceptive; for at a superficial view the thickened costal vein seems to reach only the third longitudinal vein ; but this deception arises from its color being black as far as the third longitudinal vein, and very pale between this and the fourth. Hah. Cuba. (Poey.) Gen. VI. DISCOCERIi^A Macq. The second joint oi" the antennaj has a distinct spine, the third is rounded ; the bristle pectinated. The face on its upper part is distinctly keeled, in the middle more or less inflated, receding again towards the border of the month. Clypeus projecting very little beyond the border of the mouth or entirely concealed; checks moderately descending beneath the eyes. The costal vein attains the fourth longitudinal vein. Upper side of the inter- mediate tibia) without stout bristles. Discocerina stands between the genera Psilopa Fall, and Hecamede Hal., being distinguished from Psilopa by the more rounded form of the third joint of the antcnnaj and the keel on the upper part of the face; from Heca- mede chiefly by the cheeks descending much less beneath the eyes. I can describo only two North American species of this genus, yet four are known to me as occurring in Europe. [Three more spec
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