The observations here given in brief supplement the reports of Professor J. S. Hine on the Tabanidae or horseflies of Louisiana. Fourteen additional species have been taken. The larvae of ten species have been collected in the fieldand reared to the adult stage. During 1922 Tabanus pumilus was the worst stock pest of all tabanids in the vicinity of Baton Rouge. Two species of dipterous parasites have been reared from tabanid larvae.
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Jones et al. (1923) studied this question.