【摘要】 <正> 本文记述从陕西省秦岭南坡采集到的恙螨两新种。文中所用量度单位均为微米。模式标本存放于陕西省卫生防疫站。更多还原

【Abstract】 This p醦er gives descriptions of two new species of chigger mites parasitic on rats from Shaanxi Province, All type specimens are deposited in the Heal漢 and Anti-Epiue-mic Station of Sha醤xi Province. Measurements in mioron.1, Helenicula myospalacis sp. nov. (figs: 1?)Idiosome of engorged larva elongated oval, length 426, wMth 254. Oheliceral claw wi漢 a tricuspic cap. Geleal seta* nud? Pomnula of palpol setae B-B-BBB/5B; elaw 3-forked. Senttun punctete, nearly rectangular, with concave anterior maUgiu, poste-rior margin sinWus; ratio of AW to SD approximately l :1. Scutal standard measure-ments of holotype: AW 48, PW 65, SB 11, ASB 34, P8B 17, AP 29, AM 37, AL 68, PL 56, Sens 21x18+11, Eyes 2/2, witlio-at ocular pkte. Dorsal ^eftae arraaged as 2-8-6-8... =50. TVo pairs of sternal setae. Ventral seta* 59 ia aomtoer. Legsall 7-segimented. Co-xal setae 1-1-8. Length of fegs: I 254, II 230, III 233. SIF=5B-N-3-2111.0000.Holotype and a paraltype, larrae, collwted of f My ospalou smithi Thomas in Oot. 26, 1984, from Pinghe Liang (33?8’N. 108?0VB., alt, 2,400 m), Ningshan County, Shaan. xi.This new species is alliedto H. simena (Hsn et Cheo, 1957), but differs in the for-mtik of cosal setae 1-1-8 inateaidof 1-1-6; the ratift of PW to SD 1.27 instead of 1.49; IP=747 not 935.2, Shunsennia scabmetosa sp. nov. (figs. 5?)Color in lifg milky white. Idiosome of unengorged oval, with slightly eont韙ri韈tion behind coxa?III, 354 long and 244 wide, Chelicera claw with B single row of atoot 15 sm醠i teeth. Pormula of palpal setae B-B-BNB/7B, claw bifurcate. Scutum puncta漞, roughly trapezoid shaped; anterior margin witli slightly eowvexity, pOsterior margin eoncave. Sensifla flagelliform, and very long. Seutum standard measureiments: AW 94, PW 119, SB 38, ASB 48, PSB 20, AP 46, AM 74, AL 75, PL 88, Seni9>89. Eyes 2/2, on ocular plate. Dorsal setae 92 in nnmter, arranged in irregular. Sternal setae ong pairs. Ventral setae 66. All legs with sis segmente. JP=1,113. Coxal se漚e 2-1-1, Tilbiae I桰II with 10-8-8B. Microgenmla present. SIP=7B-N-2-2111.0000. . .Holotype, larva, colleeted off Rattus -mwwnter Hodlgsan in May 22,1984, from Hu-anghlia Ling (33?7’N. 108?0’E., alt 1,800m), Zhashui Ccranty, Sha醤xi.The new species is similar to B. karunmnsk (Ktumada, 1956), but ean (be ea醠y die-tinguishcd from the fotter by the fomnila of coxal setae (2-1-1, 2-2-2 for 8. hannaeti-s韘), prespnt of eyes, less of body setae.更多还原