During the latter part of 1911 the late H. M. Russell conducted a few life-history experiments at Compton, Cal., but the work was not taken up as a special project until the following year. The laboratory work was conducted 'almost entirely at Whittier and Pasadena, Cal. The material for rearing and collection of parasites, however, was collected from the following counties: Los Angeles, Orange, Riverside, San Bernardino, and Ventura.

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