. Handbook of medical entomology. Insect pests; Insects as carriers of disease; Medical parasitology. Pediculoides ventricosus, male. After Webster. They often attack people working in poultry houses or handling and plucking infested fowls. They may cause an intense pruritis, but they do not produce a true dermatosis, for they do not find conditions favorable for multiplication on the skin of man. Tarsonemidae The representatives of the family Tar- sonemidae are minute mites, with the body divided into cephalothorax and abdomen. There is marked sexual dimorphism. The females possess stigmata a
. Handbook of medical entomology. Insect pests; Insects as carriers of disease; Medical parasitology. Pediculoides ventricosus, male. After Webster. They often attack people working in poultry houses or handling and plucking infested fowls. They may cause an intense pruritis, but they do not produce a true dermatosis, for they do not find conditions favorable for multiplication on the skin of man. Tarsonemidae The representatives of the family Tar- sonemidae are minute mites, with the body divided into cephalothorax and abdomen. There is marked sexual dimorphism. The females possess stigmata at the anterior part of the body, at the base of the rostrum, and differ from all other mites in having on each side, a prominent clavate organ between the first and second legs. The larva, when it exists, is hexapodous and resembles the adult. A niunber of the species are true parasites on insects, while others attack plants. Several of them may be accidental parasites of man. Pediculoides ventricosus (fig. 52 and 53) is, of all the Tarsonemidae reported, the one which has proved most troublesome to man. It is a predaceous species which attacks a large number of insects but which has most commonly been met with by man through its fondness for certain grain-infesting insects, notably the Angoumois grain moth, Sitotroga cerealella, and the wheat straw-worm, Iso- soma grande. In recent years it has attracted much atten- tion in the United States and its distribution and habits have been the object of detail- d» t,,, TXr^U^+n- f-r ^â ,^ 53. Pediculoides ventricosus, ^ study by Webster (19OIJ. After gravid female. (X 80).. 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 Riley, William A. (William Albert), b. 1876; Johanssen, Oskar Augustus, 1870-. Ithaca, N. Y. , The Comstock Publishing Compa
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