. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. 74 REPORT 108, U. S. DEPARTMENT OF AGRICULTURE. tures. Miss Foa has claimed that the forms which, according to Berlese, are stages in the life history of Holostaspis marginafns belong to five distinct s}:)ecies, viz, H. marginatus Herm., H. badius Koch., H. raerdarius Koch., //. coiifusus Foa, and H. submarginatus Foa, the last two new species. A great many species of Para- sitidse are found attached, often in great numbers, to various beetles; the coprophagous and xylophagous beetles are especia
. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. 74 REPORT 108, U. S. DEPARTMENT OF AGRICULTURE. tures. Miss Foa has claimed that the forms which, according to Berlese, are stages in the life history of Holostaspis marginafns belong to five distinct s}:)ecies, viz, H. marginatus Herm., H. badius Koch., H. raerdarius Koch., //. coiifusus Foa, and H. submarginatus Foa, the last two new species. A great many species of Para- sitidse are found attached, often in great numbers, to various beetles; the coprophagous and xylophagous beetles are especially infested with them. Many of these mites when attached to insects are in an immature or nymphal condition, and do not prey upon the beetle, but use it as a means of transportation. It appears that when there is a considerable increase in a species of parasitid mite living in a restricted place, as a rotten log, some specimens have the migratorial instinct which leads them to cling to any moving object; thus, attaching themselves to a beetle that has bred in the log, they are reasonably sure of being transported to a similar locality where they may start a new colony. Most of these mites cling to the host by their feet, bat in Uropodn and allied genera the mite secretes matter from two glands flanking the. 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 Banks, Nathan, b. 1868; United States. Department of Agriculture. Washington, D. C. : G. P. O.
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