MITE'S OF SUBF'AMILY HAEMOGAMASINAE — KEEGAN 223 



HAEMOGAMASUS HARPERI, new species 



Figure 45 



Female. — Dorsal shield sculptured; bluntly pointed at both ends; 

 relatively narrow ; a distinct strip of unprotected integument between 

 the shield and lateral and posterior margins of body ; shield widest at 

 level of coxae II. Usual pair of apical setae about equal in size to 

 several of the more anterior setae of apical region and flanked by a 

 pair of much smaller setae. Over the entire shield, posterior to apical 

 region, setae are between 20/x and 40/a apart and at least 80/a in length ; 

 those nearest apical region are slightly larger ; all setae smooth. Setae 

 of unprotected dorsal integument of equal size with those on shield 

 at corresponding levels; are generally largest on anterior portion of 

 body, although some at posterior body margin may be longer and 

 slenderer; all are smooth. Lacinae of tritosternum barbed. Pre- 

 sternal area well chitinized and sculptured; distinctly concave pos- 

 terior to base of tritosternum ; no spines present. Sternal shield with 

 three pairs of usual sternal setae and several smaller accessory setae, 

 which varied in number from four to seven in 22 specimens examined ; 

 the mean number was six ; these appear to be arranged in pairs in most 

 specimens; none are on the anterior margin of the shield. Usual 

 setae stout; anterior pair slightly smaller than the others and on 

 anterior margin of shield distinctly mediad to middle pair ; bases of 

 all usual setae embossed or elevated from the surface of the shield. 

 Anterior pair of sternal pores nearly parallel with anterior margin 

 of shield ; all setae smooth. Genitoventral shield narrow, sculptured, 

 and in most specimens not wider than distance between coxae IV; 

 posterior margin of shield may be nearly straight or even slightly 

 concave. Usual genitoventral setae smaller than usual sternal and 

 metasternal setae. Accessory setae smaller than usual setae and almost 

 entirely in posterior half of shield, smallest at posterior margin ; about 

 as large as accessory setae of sternal shield; number varying from 

 11 to 18 in 18 specimens examined ; mean number 14 ; all setae smooth. 

 Anal shield comparatively narrow ; over twice as long as wide ; anus 

 almost entirely in posterior half of shield ; with three usual anal setae 

 and seven larger accessory setae. In some specimens the posterior 

 usual anal seta may be as large as the smaller accessory setae ; all setae 

 smooth. Small endopodal and metapodal shields present. In some 

 specimens there are four or five small, rounded shields lateral to the 

 genitoventral shield; these appear to be in the integument rather 

 than on its surface. Tubular portion of peritreme extends to anterior 

 margin of coxae III ; posterior margin of peritreme fused with fovea 

 of coxa IV. Metasternal setae slightly slenderer than but equally 

 as long as usual sternal setae. Ventral body setae smaller but not so 

 far apart as those of dorsal shield; all are smooth. Epistome with 



