414 MR, A. D. MICHAEL ON [JuilC 3, 



in the mountains of that country as far north as 8'^ N. lat., belongs 

 to E. grevyi, I requested Mr. Hagenbcck to endeavour to obtain for 

 me a skin of this animal. This he has most kindly done through 

 the intervention of Herr Menges. 



" It will be seen, I think, that the Mountain Zebra of Somali- 

 Land is Equus grevyi (cf. fig. 1, p. 413), -while the Zebra of Masai- 

 Land, as I judge from the flat skin now exhibited (fig. 2, p. 413), 

 obtained in that country by Mr. Joseph Thomson, and kindly sent 

 for exhibition by Col. Grant, would seem to be Equus burchelli, or 

 rather its northern subspecies E. b. chapmani" 



The following papers were read : — 



1. On a Collection of Acarina formed in Algeria. By 

 A. D. Michael, F.L.S., F.Z.S., F.R.M.S., &c. 



[Eeceived May 13, 1890.] 

 (Plates XXXVII. & XXXVIIL) 



This paper shows the results of my endeavours to obtain Acarina 

 during a tour of about two months in Algeria," the time being 

 March and April 1889. The principal fauna of that country is of 

 course well known ; but, as is usually the case in non-European 

 countries, that belonging to the above-named order is practically 

 imknown. Two or three species of Acarina have been recorded by 

 Lucas \ and there have been one or two other notices of the capture 

 of a single species in Algeria or Tunisia ; but this is all, except with 

 regard to the Analgesnce, or bird-parasitic Mites, many of which have 

 been recorded by M. Trouessart from dried specimens found on the 

 bird-skins in the French Museums. 



The journey was not undertaken for collecting-purposes, but I 

 took with me a Stephenson binocular microscope and an ordinary 

 dissecting microscope, both arranged to pack in as small a space as 

 could be conveniently arranged, and I made regular use of these 

 instruments, and searched pretty constantly for creatures belonging 

 to my own specialty during all parts of the toui'. The route em- 

 braced almost the whole length and a good deal of the breadth of 

 the country, and most of the varying conditions of level and climate 

 which it affords. It commenced on the sea-coast at Philippeville, 

 almost at the extreme east, or Tunisian frontier ; thence south to 

 Constantino, which is a more high-lying situation, and again south- 

 ward to the low-level oasis of Eiskra in the Sahara, returning to 

 near Constantine, and along the ordinary railway to Setif, whence 

 the coast was again reached at Bougie through the magnificent 

 gorge of the Chabet-el-Akhira ; from Bougie I went to Algiers by 

 land. While at Algiers, in addition to exploring that neighbour- 



* Exploration Scientifique de I'Algerie, &c. Paris, 1849. 



