Title: STUDIES ON TSUTSUGAMUSHI PART 20. MORPHOLOGY OF THE NYMPH AND ADULT OF CHIGGER MITE,NEOSCH(?)NGASTIA CALLINARUM HATORI,1920 (ACARIFORMES, TROMBICULIDAE)
Abstract:The present paper deals with a redescription of the nymph and a description of the female ofNeoschongastia gallinarum Hatori, 1920. Redescription of nymph: Material: 50 specimens reared from larva, co...The present paper deals with a redescription of the nymph and a description of the female ofNeoschongastia gallinarum Hatori, 1920. Redescription of nymph: Material: 50 specimens reared from larva, collected at Shanghai, June to October, 1956. Shaped somewhat like a figure eight, with a marked constriction between propodosoma andhysterosoma. Color in life pale yellow, orange yellow or gray, body 335.721 to 714.300 μ in length,not including gnathosoma. Eyes absent. Body setae: They are provided with several kinds of seta, the short oncs (14.0 to 16.330 μ inlength) arising from all over the body, the longer ones (23.1 to 28.7 μ in length) arise at about theposterior margin of the sensillary area. The longest ones (24 to 28 in number and 48.900 to65.320 μ in length) situated along the posterior margins of hysterosoma. Gnathosoma: On hypostome bears four pairs of apical nude setae and about 20 branched setae.Palpi 5 segmented, femur with 2--7 setae feathered; genu with 1--8 setae feathered; tibia with1--6 setae feathered, 1--2 apical nude setae and 2 ctenidiae; tarsus with 9--10 setae feathered, 2apical nude setae and one striated sensory rod. Scutum: Epistome with only several denticles and one branched seta. Sensillary area as shownin the figure, with fine striations as seen in the larval scutum. Sensillae clavate. Genitalia with 2 pairs of suckers and usually has 3 pairs of genital setae. Legs: Four pairs of seven-segmented legs. Description of female: Material: A single female collected at Shanghai. Similar to the nymph in general appearance, differing in the following characters: The longest posterior body setae are 80 in number and 37.559 to 70.219 μ in length. Palp: The femur with 6 setae feathered; genu with 17 setae feathered; tibia with 5 setae fea-thered, 1 nude setae and 5 ctenidiae; tarsus with 11 setae feathered, 2 apical nude setae, 1 subapicalnude seta, 1 (?) spur and 1 striated sensory rod. Genitalia with 3 pairs of suckers and 1 pair of genital seta. The standard measurements and the chaetotaxy of legs for nymphs and adult as shown in tablesⅠand Ⅱ. The standard measurements were proposed by Sasa (1953). The values are all inmicrons. B.=Blunt striated setae. P.=Pointed striated setae.R.=Recurved setae. M.=Microsetae.N.=Nude setae. b.=Barbed setae.Read More
Publication Year: 1959
Publication Date: 1959-01-01
Language: en
Type: article
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