HOSTS 



Domestic animals ; Camel, goat, and sheep (Hoogstraal 1953D). 

 Note the two other records for camels above. 



Wild animals ; African buffalo (Sudein record above) and bush- 

 pig (I^ousselot 1953B). 



BIOLOGY 



The East African records of R. longicoxatus give the impression 

 that this is a Somali tick spec ia!Ii zed for rather arid situations. 

 The Sudsm focus is in an area far removed but with a long, intense 

 dry season. The fact that this tick also occiirs in the more humid 

 French Equatorial Africa is perplexing and indicates that we are 

 still poorly acquainted with its biology. This appears to be a 

 decidedly uncommon species. 



DISEASE RELATIONS 

 Unknown, 



IDENTIFICATION 



Male ; The scutum varies from 2.0 to A. 5 mm. in length, and 

 from 2.0 to 3.1 mm. in width; it is widest at about midlength or 

 slightly posterior of this level, and slightly convex, shiny, 

 reddish brown. Cervical grooves are short and deep; marginal 

 grooves are lacking but indicated by a row of large, deep puncta- 

 tions. Festoons are short and superficial. Scutal punctations 

 are rare, large, distant, in irregular lines like those of R. _s. 

 simus ; interstitial punctations are very few to numerous, very"" 

 fine or almost obsolete. The illustrated distribution of scutal 

 punctations is typical. Posteromedian and paramedian grooves 

 are absent thoiogh it is possible that posterior depressions may 

 develop after death and contraction of the specimen simulate 

 these grooves. Eyes are flat, vellowish, large, marginal or 

 almost marginal (see note below). The adanal shields are strong- 

 ly punctate and triangular; the juncture of the lateral and pos- 



- 662 _ 



