Manual of North American Diptera / by Samuel W. Williston.

  • Samuel Wendell Williston
Date:
1908
Catalogue details

Licence: In copyright

Credit: Manual of North American Diptera / by Samuel W. Williston. Source: Wellcome Collection.

    367/432 page 351
    S. All the tibiae with a comb-like row of long stout bristles externally. Theria. Without snch bristles, or with irregularly placed ones. . 9 9. Cheeks with long bristly hairs below. ..... 10 Cheeks with short pile Erythrandra. 10. Last section of fourth vein more oblique than the posterior cross- vein. . . . . . . . . . . .11 Both veins in nearly the same straight line; two orbital bristles in the female; none in the male. . . . Sarcophaga. 11. Two orbital bristles in each sex. . . . Sarcophagula. Two orbital bristles in the female, male? . . Helicobia. Sarcodexia and Sarothromyia are not included in the table for lack of sufficient data.
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