RHIPICEPHALUS SANGUINEUS 601 



Scutum with large punctations extending up to the posterior 



border > i </ . *~ haemaphysaloides. 



16. Articles of legs marked with fine punctations . , . . . . .17 

 Articles of leg with deep punctations, large as those on 



the scutum , . > armatus. 



17. Scutum with deep lateral grooves .18 



Scutum with lateral grooves formed of punctations . . ecinctus. 



18. Scutum with convex or slightly angular posterior border . simus. 

 Scutum with posterior border bending up behind the eyes . tricuspis. 



19. Scutum oval with a slightly sinuous contour . , . pulchellus. 

 Scutum as broad as long with a sinuous contour . . . maculat us. 



20. Scutum longer than broad with widely separated punctations ; 



legs reddish brown . ....... oculatus. 



Scutum as broad or nearly as broad as long, with punctations 



closer together ; legs reddish yellow .... evertsi. 



Rhipicephalits sanguineus, Latr. Male. (Plate LXXVII, figs. 1 and 2.) 

 Scutum brown with flat eyes ; basis capituli with lateral projections. 

 Marginal grooves extending to and bounding the extreme festoons ; 

 a white margin surrounding the scutum. Punctations very unequal in 

 size, numerous small ones evenly distributed, between which there are 

 very large ones scattered irregularly. Adanal plates triangular, at least 

 twice as long as broad. Anus situated about the middle of the length 

 of the plates ; accessory plates small and spiniform. Spiracles much 

 elongated, three times as long as broad. Coxa I without anterior hump 

 or projection. Length 3'3 mm. ; width 1*5 mm. (Neumann) 



Female. Scutum oval, a little longer than broad ; lateral grooves 

 limited by a clear relief, punctations numerous and unequal. Basis capituli 

 a little broader than half the width of scutum. Porose areas small, nearly 

 circular. Length 3 to 11 mm. ; width 1*5 to 7 mm. (Neumann) 



This species is found almost all over the world and is essentially the 

 dog tick ; in the United States it is found only in the extreme southern 

 part of Texas, where it is known as the ' brown dog tick '. Neumann 

 states it has been found on the fox, jackal, cat, lion, hare, horse, camel, 

 and even on man. He recognizes the following varieties : 



Variety ptinctissimus, Gerstaecker. Scutum with punctations more 

 equal and numerous. Male. Length 3 mm. ; breadth 1*6 mm. Female. 

 Length 2'7 to 8 mm.; breadth 1'5 to 6mm. This variety is found in 

 Zanzibar, Togo Land, Abyssinia, Natal, Cape Colony, and Walfish Bay; 

 it is parasitic on the dog and on cattle. 



Variety brevicollis, Neumann. Smaller than sanguineus; emargina- 

 tion of scutum less marked ; legs more slender. In the female the 

 scutum is longer ; the eyes are situated a little more posteriorly than in 

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