in small numbers in dry areas of the R. pravus - A. gemma associa- 

 tion. The ecology of this tick reqviires further "Setailed investiga- 

 tion. 



Around Mbui, Adamawa Province, Nigeria, the red tick forms 

 sixty percent of the specimens in tick collections (Unsworth 1%9) • 

 Reasons for this density should be interesting to investigate. 



In the Sudan, the red tick is absent in true desert areas 

 but does occur and is common in a wide variety of forested savan- 

 nah and semidesert areas. 



In Moreau's (1933) study of ticks in the stomachs of the tick- 

 bird, Buphagus erythrorhynchus (Stanley) in Tanganyika, specimens 

 of R. e. ever^si were found in three of 58 birds examined. They 

 nimBered one, six, and eighteen ticks per stomach. In Kenya, van 

 Someren (1951) found three adult red ticks in the stomachs of two 

 of the same kind of bird, but none were fovind in ten other of the 

 same kind that he examined and none were found in stomachs of 

 seven B. a. africanus. A further discussion of this subject is 

 presented~under A. variegatum , page 275. The concealed places in 

 which the red ti'ck usually feeds probably protects it from this 

 predator except in special circumstances. 



Nymphal R. evert si removed from hares, Lepus zuluensis , have 

 been found in?ected with the chalcid parasite Hunterellus hookeri 

 Howard, 1908 (Cooley 1934, see also note by Bedford in Cooley 

 1929). 



RS4ARKS 



Integumentary sense organs, which are fixed in number and 

 location, and which are essentially similar in all stages of 

 the tick, thoixgh more primitive in larvae, have been described 

 and illustrated by Dinnik and Zumpt (1949). This subject has 

 also been discussed by K. W. Neumajtin (194-2) . 



Preliminary studies on spermatogenesis by Warren (1931), 

 which do not appear to have been completed, indicate that in 

 R. e. evert si a single spermatid gives rise to several sperma- 

 Tozoa of extremely variable size. Wgrren's observations differ 

 considerably from those of Nordenskiold (1920) on Ixodes ricinus . 



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