4. PLEC0TTJ8. 179 



Fur, above and beneath, dark at the base ; on the upper surface 

 light shining brown, beneath pale ashy or dirty white. The colour 

 of the extremities of the fur, above and beneath, appears to vary 

 sometimes considerably, according to age and locality ; young indi- 

 viduals, and probably females also, are much darker than adnlt 

 males. Specimens are occasionally found with a reddish tinge on 

 the dorsal surface. Examples from Northern Africa and sandy 

 districts in the neighbourhood of the Mediterranean and Caspian 

 seas are much paler in colour throughout than those from moister 

 countries. This I have frequently observed in specimens of Bats 

 brought from desert regions. 



Upper incisors parallel on each side ; the inner long and un- 

 equally bifid, the smaller cusp external ; the outer incisor scarcely 

 half the length of the inner incisor, unicuspidate, not equalling the 

 outer small cusp of the inner incisor in vertical extent, and scarcely 

 one quarter its size ; the second premolar exceeds the canine in 

 transverse section, and is but slightly less than it in vertical ex- 

 tent ; last upper molar about equal to half the antepenultimate 

 molar ; second lower premolar about two thirds the vertical extent 

 of the first premolar, but scarcely half its transverse diameter ; 

 third premolar longer than the second premolar, but less than the 

 first molar. 



Length, head and body l"-8, tail l"-8, head 0"-65, ear l"-4 x 0"-65, 

 tragus 0"-6 x 0"-2, forearm l"-5, third finger 2"-65, fifth finger 2"-l, 

 tibia 0"'7, calcaneum 0"-7, foot 0"-35. 



ITah. The Palsearctic Kegion, extending from Ireland through 

 Europe and North Africa to the Himalaya, and probably generally 

 distributed throughout the temperate parts of Asia. 



Plecotus Jiomochrovs, Hodgson, from the Himalaya, can only be 

 distinguished by the slightly greater length of the ears and short- 

 ness of the thumbs. I believe it cannot be considered more than a 

 variety of PI. auritus. 



a. 5 ad., al. London. 



h-i. c? & 2 ad., al. Devonshire. Zool. See. Coll. 



j. 5 ad., al. England. 



k. 5 ad,, al. England. 



I, m. ad. sks. England. Old Collection. 



no ad. sks. Bonchurch, L of Wight Rev. 0. A. Bury [P.]. 



p' q. 5 ad.,al. Co. Longford, Ireland. G. E. Dobson, M.B. [P.]. 



r c? ad., al. Darmsdorf, Silesia. Dr. Giinthev. 



s ad sk St. Mauria. M. Leon Galliard [P.]. 



t ad sk. St. Gothard. Mr. Brandt's Coll. 



u. 2 imm., al. Sicilv. Purchased. 



t^:;;: ad. sks. Europe. J^^'^T ^""^u""" rx. i 



u. ad. sk. Malta. Lord Arthur Hay [P.]. 



U'. ? ad., al. Egypt. ^''\%^- Cambndge [P.]. 



a. $ ad.,al. Egypt. - ^^ ilkmson Esq. [P.]. 



", ad sk. N. Africa. Dr. Chnstie [P.]. 



iType of Plecotus christii, Gray.) 



r, , ^ Cave of AduUam, Pales- Canon Tristram [C.]. 



tine. 



' ad al. Nipal. (Type of Plecotus homochrous, Hodgson). 



