. Circular. Insect pests; Insect pests. Fig. 3.—Horn fly: o, Head of female, front view; 6, head of male, front view; c, head from side, enlarged. (From Riley and Howard.) (ireatly somewhat, at least, for the much greater damage occasioned by the horn fly in the first years of its occurrence in the different zones of its spread across the continent than w^as the case during subsequent years. Very early after the appearance of the horn fly it was noted by Mr. F. M. Webster that in Ohio fully. 20 per cent of the flies were infested by one of the scarlet mite fly parasites (Gamasidae). This mite
. Circular. Insect pests; Insect pests. Fig. 3.—Horn fly: o, Head of female, front view; 6, head of male, front view; c, head from side, enlarged. (From Riley and Howard.) (ireatly somewhat, at least, for the much greater damage occasioned by the horn fly in the first years of its occurrence in the different zones of its spread across the continent than w^as the case during subsequent years. Very early after the appearance of the horn fly it was noted by Mr. F. M. Webster that in Ohio fully. 20 per cent of the flies were infested by one of the scarlet mite fly parasites (Gamasidae). This mite was not determined, but was probably one of the native species commonly seen on other flies. The introduction of the horn fly into the Hawaiian Islands and the heay}^ losses there occasioned by it led to an active investigation on the part of the island authorities of parasites and predaceous enemies. Mr. Albert Koebele imported, in 1905, from New South Wales, quan- tities of material from which dung beetles were reared and introduced into the islands. In 1906 Mr. Koebele came to the United States and made extensive collections of material in California and Arizona, and from this material at least six or seven species of dung beetles were introduced into the Hawaiian Islands, and two species of true parasites. [Cir. 115]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington, D. C. : The Bureau
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
