6 DR. J. ANDERSON ON MAMMALS, REPTILES, [Jan. 5, 



well-marked new species of the genus Chalcides, of which I give a 

 description and three figures, accompanied, for the sake of comparison, 

 by two views of the head of its nearest ally, C. sepoides, Audouin. 



At the same place my collector also found a Viper distinctly 

 referable to F. lebetina, but, at the same time, differing so much 

 from the typical form, in some of the details of its structure, that I 

 have had no other course left me but to describe it as a variety. 



MAMMALIA. 



Order CHIEOPTERA. 



Family I. RHiNOLOPHiDiE. 



Genus Rhinolophus, Geoffrey. 



1. Rhinolophtjs euryale, Blasius ; Lataste, Etude de la 

 Faune des Vertebres de Barbaric, 1885, p. 65. 



1 <S , cave at Hammam Meskoutine, Province of Constantine. 



Family II. Vespertilionid^. 



Genus Plecottjs, Geoffroy. 



2. Plecotxjs auritus, Linnaeus ; Lataste, Etude de la Faune des 

 Vert^r^s de Barbaric, 1885, p. 66. 



2 c? & 14 ? , Duirat, Tunisia. 



Beyond M. Loche's statement^ that he saw a specimen of this Bat 

 in the hands of a child at Blidah, I am not aware of any other notice 

 of its occurrence in Algeria, and this is the first time it has been 

 reported from Tunisia. The foregoing specimens, instead of being 

 light brown, are pale ashy on the upper surface, the light colour 

 generally distinctive of this Bat in desert regions. 



Genus Vesperugo, Keys. & Bias. 



3. Vesperugo kuhli, Natterer; Lataste, Etude de la Faune des 

 Vertebres de Barbaric, 1885, p. 70 ; id. Cat. Crit. des Mammif. 

 Apelagiques Sauvages de la Tunisie, 1887, p. 2. 



1 rf & 1 2 ^ Duirat, Tunisia. 



* Cat. des Mammif. etdesOiseaux observes en Alg^rie, 1858, sp. 43. 



- The wing and interfemoral membranes of one of these Bats are torn and 

 shrivelled up in places along the margins to such an extent that the flight of 

 the animal must have been materially affected by it, Here and there over the 

 surfaces of the membranes, and elsewhere on the body, there are dense colonies 

 of a minute white Acarus, and it seems probable that the irritation produced by 

 them had set up inflammation resulting iu the partial destruction of the mem- 

 branes, which also, when held against the light, were seen to be covered with 

 small black spots, doubtless old inflamed areas due to the same cause. Mr. A. 

 Michael kindly undertook to determine the nature of these Acari. The following 

 are his remarks : — 



" The Acari submitted to me belong to two species only, and are all immature. 



" The first is a single specimen of the nymph of one of the Isodidw, and 



