occurs. Small rhipicephalid species that crowd into a small area 

 01 the host frequently show these modifications 7 Small or fine 

 interstitial punctations are present, though they may be faint. 

 Coxa I bears a pointed dorsal projection that typically is proml. 

 nent but in some specimens is smaller, though still pointed. 

 This reddish to black tick usually has a pearshaped body and 

 measures up to 3.5 mm. or even /^.3 nmi. long. 



. , ,Z2^- Usually small size (up to A.5 mm. long and 2.3 mm. 

 wide)-^5^sociation with the male distinguishes this sex from 

 that of R. s. £imug Clearcut characters to distinguish these 



iS,ir ^'Jf^f^'^^ ^° ^^^^"^ i" ^i^ °^ ^^^ frequent 

 reduction of the lateral grooves in R. s. simus. In m^st spec 

 imens of R. tricuspis the shieldshaped "icut^Iir^ontrasts with 

 the subcircular scutum of R. s. simus . The lateral grooves 

 are characteristically short TshSHi? than in R. s. simus) and 

 contain four to six closely adjacent punctations." 



Larvae and nymphs have been described by Theiler (19Z.7) and 

 con?)ared with those of R. s. simus. v ^^'^ ^i^ 



- 777 _ 



