| abstract | The present paper embodies the result of study of two new species and one new record of the genus Haemogamasus in China. The types of the two new species are preserved in the Institute of Epidemiology & Microbiology, Chinese Academy of Medical Sciences, Peking, China.
Haemogamasus pingi, sp. nov.
Female (Figs. 1-6): Idiosoma 930-970µ long, 610-660µ wide; dorsal plate 805µ long, 415µ wide, shoulders prominent, both anterior and posterior margins of the plate tapering towards the ends, covered densely with nude setae.
Sternal plate, about 99.6µ long in middle and 135µ wide in the narrowest portion, with both anterior and posterior margins concave; of the principal setae, the firstpair (St1) plumose, the other pairs (St2, St3) smooth, with 24 smooth accessory setae, two of these located at anterior margin between first principal pair of setae; with 3 pairs of slit-like pores, the third pair stand behind the plate. Genitoventral plate concave or rounded in posterior margin; with 50-60 setae, of these, four in the utmost front. Anal plate rounded in front, narrowed posteriorly below the horizontal level of the adanal setae; postanal seta weakly plumose, slightly longer than paired ones; there are 5 accessory setae. Ventro-lateral plate somewhat shuttle-like, both anterior and posterior ends pointed, with its lateral margins expanded irregularly. Peritremal plate usually reaching to the middle of coxa II.
Gnathosomal setae with anterior pair smooth, remaining 3 plumose. Pilus dentilis with two bulb-like expansions with the basal one larger than the apical one. A long seta-like hyaline appendix on base of fixed chela with pointed tip reaching over the tip of chela. Tectum subtriangular in outline fringed, the apical fimbura bears 3 branches, while the others mostly simple.
Holotype (♀) and paratypes (30♀♀) collected from Myospalax rothschildi Thomas from May to August, 1960, from Hupeh Province, China.
The present species closely resembles H. citelli Breg. & Nelz. in the shape of the dorsal plate and in the general appearance of the tectum, but it differs from the latter in the peculiar form of pilus dentilis, and in the less number of accessory setae on the sternal plate.
This new species is named in honor of to Dr. C. Ping, Professor of the Institute of Zoology, Academia Sinica, for his inspiring encouragement.
Haemogamasus szechwanensis sp. nov.
Female (Figs. 7-12): Idiosoma oval, 870-900µ long, 510-550µ wide. Dorsal plate not covering entire body, 750-760µ long, 450-460µ wide, densely covered with nude setae.
Sternal plate 81-89.6µ long in the middle and 135-143µ wide across the narrowest portion; both anterior and posterior margins concave; of the principal setae, the first pair rather short, plumose, the other two pairs being longer, smooth; with 3 pairsof slit-like pores, the third pair small, situated near posterior margin. Genitoventral plate much expanded below coxa IV, posterior margin slightly concave, with 70-80 setae, all smooth. Anal plate pear-shaped; adanal setae situated at the horizontal level of the center of the anus; postanal seta rather long, slightly plumose; with five smooth accessory setae. Ventro-lateral plate oval. Peritremal plate usually reaching to the anterior portion of coxa I.
All of gnathosomal setae plumose. Chelicera stout and strong; movable chela with 2-3 prominently gross teeth. Pilus dentilis smoking-pipe-shaped, the base of the fixed chela, bears a hyaline appendix not reaching the tip of chela. Tectum as shown infigure 11.
Legs rather long, but the second pair somewhat stout. Tarsus IV bearing two longand plumose setae, the longer one about 160µ long.
Holotype (♀) and paratypes (2♀♀) collected off Microtus sp. and in its nest in July, 1959 from Szechwan Province, China.
The present species very closely resembles H. oliviformis Teng et Pan, but the genitoventral plate is much expanded laterally and the setae greater in number on the plate, the pilus dentilis being much enlarged on the basal portion. |