604 MEDICAL ENTOMOLOGY 



Rhipicephalus simus, popularly known in South Africa, as the 'black 

 pitted tick ', is easily recognized by the somewhat indistinct median 

 and accessory furrows near the posterior margin ; the lines are almost 

 microscopical and may be wanting in the male. The adanal plates are 

 better developed than in appendiculatus. R. simus is the invertebrate 

 host of The Her ia parva. 



Rhipicephalus bursa, Can. and Fan. Male. Scutum brown ; eyes 

 prominent ; white margin surrounding the scutum ; marginal groove 

 extending to and bounding the extreme festoon. Punctations numerous, 

 of various sizes, large, medium and small, and in mixed clusters. Adanal 

 plates triangular, nearly twice as long as broad, posterior border round ; 

 anus situated nearer the anterior than the posterior end. Accessory 

 plates small, triangular and spiniform. Caudal appendage absent or 

 if present very short ; spiracles elongated. Length 4'5 mm. ; width 

 3 mm. (Neumann) 



Female. Scutum as broad as long, round. Cervical grooves deep 

 anteriorly and broader posteriorly ; lateral grooves absent. Punctations 

 numerous, thickly set and fairly equal in size. Capitulum together with 

 palps as broad as long. Porose areas large and oval, and divergent 

 anteriorly. Length 4 to 17 mm. ; width 2 to 9 mm. (Neumann) 



This species is found in Southern Europe, Africa, Cuba, Vera Cruz and 

 Batavia ; it is parasitic on cattle and on the horse, sheep, goat, pig and 

 the dog. It is the invertebrate host of Piroplasma ovis. The male can 

 be recognized by the characteristic adanal plates, which have a broad 

 posterior margin. 



Rhipicephalus capensis, Koch, C. L. Male. Scutum dark brown 

 with numerous large and contiguous punctations, which form transverse 

 ridges in the middle. Eyes flat and elongated. Marginal grooves con- 

 taining large punctations. Adanal plates triangular, twice as long as 

 broad, the internal borders much longer than the external ; the internal 

 angle truncated. Anus situated nearer the anterior ends of the plates. 

 Accessory plates well developed and with long spines. Basis capituli 

 nearly as long as broad, the lateral projection nearer the anterior third. 

 No caudal appendage. Spiracles long and broad. Length 4'3 mm. ; 

 width 2'8 mm. (Neumann) 



Female. Scutum as broad as long, with rounded contour ; cervical 

 grooves long and deep ; lateral grooves with external edge standing out 

 in relief. Basis capituli nearly twice as broad as long, and together with 

 the palps it is longer than broad. Porose areas circular. Length 

 5 mm. ; width 3 mm. (Neumann) 



