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CHARLES V. RILEY.  Our American Ox Warbles.

Proc. Ent. Soc. Washington, II, No. 2, June 30, 1892, pp. 212-213.

Résumé of observations made in Europe and establishing the specific distinction of Hypoderma lineata from H. bovis;  Proof that the North American "Heel-fly" belongs to the former species;  The occurrence of H. bovis in America is doubtful.