332 



GEORGE H. F. NUTTALL. 



(9) R. tricuspis, Donitz, 1906. Resembles R. sanguineus, but the adanal shields 

 are bifid as in R. lumdatus (figs. 31 and 32). 



Fig. 31. Bhipicephalus tricuspis, Donitz, 1906, ^ : dorsum and 



venter (Donitz, 1906). 



Fig. 32. Rhipicephalus tricuspis, 



Donitz, 1906, $ : capituium and 



scutum (Donitz, 1936). 



Genus 6. Maegaropus. 



Generic characters : Anal grooves obsolete ; inornate, with eyes, hut ivithout festoons,, 

 ivith short palps, and capituium intermediate between ^/i^zf o/Ehipicephalus«/i(ZBoophilus, 

 highly chitinized and of large size. The female ivith very small scutum. The male ivith 

 a median abdominal plate prolonged in two long spines p)rojeciing beyond and to either 

 side of the anus ; the articles of the legs, esptecially of leg IV. greatly swollen ; tarsi in 

 both sexes ivith a long sharp spur extending far beyond the claws, ivhich are small and 

 functionless ; a caudal jirotrusion present in the male. Spiracles rounded or short 

 oval in both sexes. (Figs. 33 and 34.) 



