1900.] INSECTS X^D ARACHNIDS FROM SOMALILAND. 49 



Class ARACHNIDA. 



Order Acari. 



Family Trombidiid.e. 

 Genus Trombidiuai. 



Trombjdiuji TixciORTUii (Linn.), Trouess. 



Trombidium tinctorium, Trouessart, Ann. Soc. Ent. France, 1894, 

 pp. 89-91 & 94, fig. a. 



Loc. Hargaisa in North-west Somalilaad (April 25-28, 1895). 

 Two specimens in the Hope Museum at Oxford. 



Family Argasidje. 

 Genus Ornithodoros Koch. 



Ornithodoros savigsti (Aud.). 



Argas saviqnyi, Aud., Description de l'Egypte, Hist. Nat. i. 

 pi. iv. fig. 5 ; Explanation of Plates, p. 183 (1827). 



Ornithodoros savignyi, Neumaun, Mem. Soc. Zool. France, x. 

 p. 26 (1897). 



Loc. Bularli in West Somaliland (May 1895). Six specimens, 

 two in the British Museum, the rest in the Hope Museum at 

 Oxford. 



Family IxodidyE. 



Genus Htalomma C. Koch. 



HXALOMMA GROSSUM C. Koch. 



Hyalomma grossum, C. Koch, Arch. Natur. x. i. p. 220, no. 2, 

 Uebersicht etc. iv. p. 34, pi. ii. fig. 8 (1847). 



Loc. Bularli in West Somaliland (May 1895). 



A single distended female, probably referable to this species ; in 

 the Hope Museum at Oxford. 



Genus Rhipicephalus C. Koch. 



Rhipicephalus sanguineus (Latr.). 



Ixodes sanguineus, Latreille, Hist. Nat. Crust. Ins. i. p. 157 

 (1804). 



Rhipkephalus sanguineus (Latr.), Neumann, Mem. Soc. Zool. 

 France, x. p. 385 (18S7). 



Loc. Bularli in West Somaliland (May 1895). 



Three specimens, one in the British Museum and two in the 

 Hope Museum at Oxford. 



Proc. Zool. Soc— 1900, No. IV. 4 



