. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PKEVIOUS WORK WITH INSECT PARASITES. Other Introductions by Koebele into California. 31 Mr. Koebele took a second trip to Australia, New Zealand, and the Fiji Islands while still an agent of the Department of Agriculture, but at the expense of the California State Board of Horticulture, and in 1893 he resigned from the United States Department of Agriculture and was employed by the State Board of Horticulture of California for still another trip to Australia and other Pacific islands. He sent home a large number
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PKEVIOUS WORK WITH INSECT PARASITES. Other Introductions by Koebele into California. 31 Mr. Koebele took a second trip to Australia, New Zealand, and the Fiji Islands while still an agent of the Department of Agriculture, but at the expense of the California State Board of Horticulture, and in 1893 he resigned from the United States Department of Agriculture and was employed by the State Board of Horticulture of California for still another trip to Australia and other Pacific islands. He sent home a large number of beneficial insects, nearly all of them, however, coccinellids. Several of these species were established in California, and are still living in different parts of the State. The overwhelming success of the importation of Novius cardinalis was not repeated, but one of the insects brought over at that time, namely, the ladybird beetle Ehizobius ventralis Er. (fig. 5), an enemy of the so-called black scale (Saissetia olese Bern.), was colonized in various parts of California, and in districts where the climatic conditions proved favorable its work was very satisfactory, nota- bly in the olive plantations of Mr. Ell wood Cooper, near Santa Barbara. Hundreds of thousands of the beetles were distributed in California and in some localities kept the black scale in check. Away from the moist coast re- gions, however, they proved to be less effective. International Work with Enemies of the Black Scale. It will here be convenient to drop the chrono- logical sequence with which the subject in hand has been treated and to refer to the introduction of a very successful parasite of the black scale, whose work against this destructive enemy to olive and citrus culture in California for a time seemed second only to the success of the Novius against the Icerya. In 1859 Motchulsky described, under the name Scutellista cyanea (fig. 6), a very curious little hymenopterous parasite reared by Nie
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