MITES OF SUBFAMILY HAEMOGAMASINAE — KEEGAN 221 



prominences on anterior margin of anal shield; posterior end of 

 peritreme larger and slenderer than in other species ; all fimbriae of 

 epistome multiple ; 8 to 10 fimbriae on each lateral margin ; two teeth 

 on movable chela; fixed chela with a bifid tip, a distal seta and one 

 tooth ; maxillary setae barbed ; most palpal setae barbed ; most setae 

 on legs barbed. Male: Setation as in female including pattern of 

 setation of ventral shield, which curves laterally and anteriorly to 

 contact posterior end of peritreme; peritreme as in female; blunt 

 maxillary corniculi; spikelike epistome with four or five multiple 

 fimbriae on each lateral margin; specialized, stout, ventral setae on 

 femur, genu, tibia, and tarsus of leg II, 



Distribution and hosts. — Vitzthum (1931) reported this species 

 from Phodopus hedfordiae (Thomas) and Dipus sowerbyi Thomas, 

 both from North China. The female specimen in the U. S. National 

 Museum collection was taken from the mole Scaptochirus gilliesi at 

 Wu-Ysai, Shansi, China. The male, which was obtained through the 

 courtesy of Dr. Charles R. Remington, of Harvard University, was 

 taken from Clethrionomys aniurensis tnikado in Japan. Specific 

 locality data were not given. 



Size. — Vitzthum gives the length of the female as l,060;u, to l,080ju,; 

 length of the male as 770/a to 800/i.. The female specimen in the 

 U. S. National Museum collection is somewhat distorted; the male 

 measures 770^ in length and 420ft in width. 



HAEMOGAMASUS LIBERIENSIS Hirst 



Figure 55, a, b 



Haemogamasus liberiensis Hikst, Journ. Zool. Res., vol. 1, pp. 7G-78, flgs. 10-11, 

 1916.— Vitzthum, Zool. Jahrb. (Abt. Syst.), vol. 60, p. 400, 1931. 



No specimens of this mite were available for study. The following 

 data are taken from Hirst's (1916) original description. 



Female. — Dorsal shield covers entire dorsal surface. Setae on 

 shield short, barbed, and very numerous. Presternal area sculptured. 

 Sternal shield with usual sternal setae and about 45 accessory setae, 

 which are present over the entire shield and which are nearly as large 

 as the usual setae ; two pairs of accessory setae on anterior margin of 

 shield ; all of usual sternal setae, as well as many of accessory setae, 

 barbed. Genitoventral shield not greatly expanded posteriorly, with 

 numerous accessory setae present over entire surface of shield. It is 

 impossible to determine from Hirst's figure whether usual genito- 

 ventral setae are larger than accessory setae; many setae on shield 

 barbed. Anal shield with three usual anal setae and six or seven acces- 

 sory setae in type specimen. Endopodal shields not figured or men- 

 tioned. Metapodal shields small and oval. Metasternal setae present. 

 Ventral setae very numerous; nearly all are barbed. Structure of 



