. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. the Genus Demodex, Owen. Demodex ratti^ Halm. 233 ? •—This species is long and slender, being about seven and a half to eight and a half times as long as tlie width of the cephalothorax. Capitulatn narrow, being longer than wide. Cephalothorax also characteristically narrow and much shorter than the abdomen; the latter is wider, but fan-lj long and vermiform. The two spines on the dorsal surface of the capitulum are well developed and fairly lont>-; they are curved near the
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. the Genus Demodex, Owen. Demodex ratti^ Halm. 233 ? •—This species is long and slender, being about seven and a half to eight and a half times as long as tlie width of the cephalothorax. Capitulatn narrow, being longer than wide. Cephalothorax also characteristically narrow and much shorter than the abdomen; the latter is wider, but fan-lj long and vermiform. The two spines on the dorsal surface of the capitulum are well developed and fairly lont>-; they are curved near the base and pointed at the end. Meamrements.— hQngih o£ body (including capitulum) 237 /z; width of cephalothorax 27 yu,, of abdomen 36 /x. Fiff. Demodex ratti, Halin. Dorsal view of capitulum. Material.—I have examined two adult female specimens collected by Leslie Linzell from a wild rat {Rattus nowpglcus). Mr. Linzell informs me that the parasites were very abundant in the skin of this rat. Demodex muscult, Oudms. The adults of this species are rather short. Cephalothorax + capitulum a little shorter than abdominal part of body. Capitulum of moderate width, being widest at the base, where it is about equal to the length. Distal end of capitulum (palp) with the outer angle strongly salient laterally and Ann. 6s Mag. N. Hist. Ser. 8. Vol. xx. IG. 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 London, Taylor and Francis, Ltd
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