328 



GEORGE H. F. NUTTALL. 



(6) R. sanguineus (Latreille, 1804). A common species. Colour reddish brown. 

 Scutum with punctations of variable size, with three characteristic posterior 

 furrows. Adanal shields rounded behind. When fully fed the male may 

 show a slight caudal protrusion (figs. 25-28). For biology see p. 345. 



Fig. 25. Bhipicephalus sanguineus (LatreiUe, 1804) ^^ : (a) normally developed 

 specimen in dorsal and ventral aspects, (x) and (u) its spiracle and tarsus ; (b) 

 dwarf male which was picked off the host before it became fully gorged, in both 

 larval and nymphal stages, (z) and (v) its spiracle and tarsus ; (w) and (y), 

 intermediate forms of adanal plate and spiracle respectively. (N. Cunliffe, 1914.) 

 A similar variation in size and appearance is observed in nature. 



