The covmt of three pairs of pointed hair tufts noted by Karsch 

 for M. vinthemi was probably due to the dry, greasy, rubbed condi- 

 tion~of the specimen. Fresh specimens bear six pairs of posterior 

 hair tufts; these are not pointed. 



Subsequently, the generic description of Margaropus presented 

 by most writers has included the statement that the adanal shields 

 are joi led anteriorly, a fact true for M. winthemi , though dif- 

 ficult to discern in many specimens, buE not true for M. reidi 

 sp. nov. " 



The genus may be redefined as follows: Males with expanded 

 leg segments that are more or less deeply separated from each 

 other (partially noncontiguous); adanal shields arising at level 

 of coxa TV and extending posterior of anus; tarsi elongate, nar- 

 row, tapering, with a large, apical, hooklike projection; palpi 

 intennediate between those of Boophilus and Rhipicephalus , not 

 ridged as in former genus; integument with conspicuous hairs 

 posteriorly; with eyes (may be indistinct in M. winthemi ) ; un_ 

 ornamented. Females with leg segments not greatly widened bvrt 

 other leg characters similar to those of male. Palpi inter- 

 mediate between those of Rhipicephalus and Boophilus . Eyes 

 distinct . 



DISEASE RELATIONS 



Although circximstantially associated with babesiosis, Babesia 

 bigemina , no actual relation of this tick to any pathogenic or- 

 ganism has been demonstrated. 



IDENTIFICATION 



MALE: Length overall up to 3.7 mm., width 2.5 mm.; color 

 reddish brovm; outline oval with integument bulging beyond scu- 

 tum laterally and posteriorly; \d.th caudal protrusion when en- 

 gorged. 



Capitulum ; Basis capituli approximately twice as wide as 

 long, lateral margins curved, basal margin concave; bearing a 



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