MITE'S OF SUBFAMILY HAEMOGAMASINAE — KEEGAN 225 



present. Structure of maxillae not clear; maxillary setae smooth. 

 All palpal setae smooth. Legs stout; legs I and IV longest; leg II 

 shorter and comparatively thicker than others; coxa of leg II much 

 larger than those of other legs. Tarsi of all legs relatively shorter 

 than those of most other species and also distinct in being abruptly 

 narrow distally. Length-width ratios of tarsi are : Leg 14:1, leg II 

 3.5 :1, leg III 4.5 :1, leg IV 5 :1. Stout setae are present on distal ends 

 of tarsi II, III, and IV ; all setae smooth ; as in other species, ventral 

 setae are stouter. 



Male. — Dorsal shield and its setation, as well as setation of unpro- 

 tected dorsal integument, as in female. Tritosternum and presternal 

 area as in female. Ventral shield relatively narrow, not covering 

 entire ventral surface posterior to coxae IV and not curving anteriorly 

 lateral to coxae IV. Usual sternal, metasternal, and genitoventral 

 setae present as well as accessory setae of genitoventral region ; acces- 

 sory sternal setae lacking; usual sternal setae as in female; middle 

 pair of usual sternal setae on lateral margin of shield ; anterior pair 

 of sternal pores angled posteriorly. A distinct gap between most 

 anterior accessory setae of genitoventral region and usual genitoven- 

 tral setae. Long, narrow anal region distinctive; setation of this 

 region as on anal shield of female. Endopodal shields fused with 

 ventral shield. Metopodal shields as in female, a distinctive feature. 

 Ventral body setae, peritreme, and epistome as in female. Fixed 

 chela shorter and stouter than in female and with a spatulate tip. 

 Movable chela with an abruptly truncated tip and with a small tooth 

 near its distal end, the bursa larger distally. Legs no thicker than 

 those of female. Leg II differs from that of female in having a 

 strong ventral seta on each of the following segments : femur, genu, 

 tibia, and tarsus ; tarsal seta is distinctive in that its thick proximal 

 portion abruptly narrows into a slender distal spike. Tarsus II lacks 

 the short, stout, distal setae of the female and may be relatively 

 shorter than the latter, although this is not the case in all specimens. 



Nymph. — Relatively shorter than adults. On one uncrushed speci- 

 men the dorsal shield covers the entire dorsal surface. Dorsal seta- 

 tion, tritosternum, and presternal area as in adults. Ventral shield 

 with usual sternal and metasternal setae; usual genitoventral setae 

 flank the narrow posterior end of shield ; middle and posterior pairs of 

 usual sternal setae as well as metasternal setae are on lateral margins 

 of shield. Setae are as in adults except that middle and posterior 

 pairs of sternal setae are relatively closer than in the former. The 

 tapering, narrow posterior end of the shield is distinctive. Sternal 

 pores as in female; posterior pair touch the lateral margins of the 

 shield. Anal shield may be relatively shorter than in female; with 



