Handbook of medical entomology . ^ be noted, D. hirundinusand D. gallinae. The latter (fig. 51) is a serious pestof poultry, sometimes attacking man, causing itchingand soreness,ee. Anal plate absent. In lungs and air passages of some mammals. Halarachnin^. dd. Free or attached to insects, rarely on vertebrates. e. First pair of legs inserted within the same body opening as the oraltube; genital apertures surrounded by the sternum. On in-sects TjROPODIDiE. (fic/ii^fuil. spun. 9-. Rhicephalus sanguineus, Nuttall and Warbur-ton. ee. First pair of legs inserted at one side of the


Handbook of medical entomology . ^ be noted, D. hirundinusand D. gallinae. The latter (fig. 51) is a serious pestof poultry, sometimes attacking man, causing itchingand soreness,ee. Anal plate absent. In lungs and air passages of some mammals. Halarachnin^. dd. Free or attached to insects, rarely on vertebrates. e. First pair of legs inserted within the same body opening as the oraltube; genital apertures surrounded by the sternum. On in-sects TjROPODIDiE. (fic/ii^fuil. spun. 9-. Rhicephalus sanguineus, Nuttall and Warbur-ton. ee. First pair of legs inserted at one side of the mouth opening; malegenital aperture usually on the anterior margin of the sternal plate Gamasidae. This family contains a number of genera, some of which are foundupon mammals, though the majority affect only other artho-pods. One species, Laelaps stabularis, frequents the beddingin stables, and in one instance at least, has occasioned irri-tation and itching, in distinct spiracle in the stigmal plate on each side of the body. c. Body usually coriaceous, with few hairs, with a specialized seta arisingfrom a pore near each posterior corner of the cephalothorax; no eyes;mouth parts and palpi very small; ventral openings of the abdomen large; tarsi without sucker. Not parasitic ORIBATOIDEA. cc. Body softer; without such specialized seta. d. Aquatic species HYDRACHNOIDEA dd. Not aquatic. Acarina 267 Palpi small, three segmented, adhering for some distance to the


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1915