. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. THE ACAEIXA OR MITES. 85 peculiar to rats, produced by a sporozoan, Hepatozoon pemidosus. The sexual cycle occurs within the Laelaps, so that it is a necessary factor in this disease. The genera Foecilochirus and Gamasoides are very near Parasitus, but have a mem- branous appendage to the movable finger of the mandibles. Gamasoides has stout spinelike Ijristles aboAe on the femora. The genus Parasitus ^ (figs. 160, 161, 162) includes a host of species aU over the world; but few of ours have l)een descri
. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. THE ACAEIXA OR MITES. 85 peculiar to rats, produced by a sporozoan, Hepatozoon pemidosus. The sexual cycle occurs within the Laelaps, so that it is a necessary factor in this disease. The genera Foecilochirus and Gamasoides are very near Parasitus, but have a mem- branous appendage to the movable finger of the mandibles. Gamasoides has stout spinelike Ijristles aboAe on the femora. The genus Parasitus ^ (figs. 160, 161, 162) includes a host of species aU over the world; but few of ours have l)een described, and several are apparently identical with some of the European species. Berlese and others ha^xe split the genus into a great number of subgenera, most of which are difficult to recognize in both sexes. The spe- cies of Parasifj^s (figs. 1(13,1G4) are mostly found running freely among fallen lea^•es in the woods, or in heaps of refuse or debris. Rarely are they attached to insects or occur in ant nests. Several inliabit sea beaches, often below the high-water marlc. They are always predaceous, and are sometimes beneficial in destroying spiingtails and in- jurious mites. !Most of the species ha^-e the same general habitus, and are difficult of separation. The European forms have been monographed by Berlese. I. 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.
Size: 1322px × 1890px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1915
