Myotis iScc. from Central and South America. 545 



greatest breadth 37; nasals 29 (diagonally) x 13'7 ; inter- 

 oibital breadth 17, breadth of occi|)ital shelf 0; diastema 22 ; 

 length of palate 21.>"0 ; palatal foramina 17'5x7*3; greatest 

 antero-posterior diameter of bulla 7"3. 



Ilah. Caroiidelet, Rio Bogota, Province of Esmeraldas, 

 N. Ecuador. Altitude 20 m. 



Type. Female, Collector's number 94. Killed 14th Octo- 

 ber, 11)00. Two specimens examined. 



This iiitere.«ting little hare, the first described from the low 

 country west of the Andes, may be readily distinguished from 

 all others by its short, nearly black ears, minute bull^, 

 rudimentary tail, and general dark coloration. 



Metachirns nudicaudatus phceurus, subsp. n. 



Similar in general characters to the typical form, but the 

 tail uniforndy dark brown to the tip. 



Colour of the usual buffy grey-brown ; dark dorsal area 

 well marked. Supraorbital spots prominent, yellowish wliite. 

 Middle line of face, crown, and nape blackish. Under surface 

 dull buffy wliite, not sharply defined laterally. Ujiper surface 

 of wrists and metacarpals brown, of hind feet greyish. Tail 

 uniformly blackish brown throughout, except that there are a 

 few indistinct whitish mottlings along the middle line below. 



Dimensions of the type (not fully adult, measured in the 

 flesh):— 



Head and body 214 millim.; tail 251; hind foot 39; 

 ear 29. 



Skull: greatest length 52; basal length 48; zygomatic 

 breadth 26*5 ; nasals 27-5 x 7*2 ; intertemporal breadth 8*7; 

 breadth of brain-case on squamosals 17 ; combined length of 

 three anterior molariform teeth 9. 



IJah. St. Javier, Lower Cachavi River, N.VV. Ecuador. 

 Altitude 20 m. 



Type. Male. B.M. no. 1. 3. 19. 44. Original number 24 

 Collected 19th May, 1900. 



This form presents a remarkable parallel to .1/. opossum 

 melanurus, Thos.*, from the same district, which, exactly as 

 in the present case, agrees with its allies elsewhere in all 

 respects, except that it has a wholly dark instead of a white- 

 tipped tail. 



The material at my disposal is not sufficient for me to 

 criticize Dr. Allen's separation of ^1/. Tiichudii axid Af. n. colom- 

 hianus from the typical M. nndicaudatus, but both, like the 

 latter, have white-tipped tails. 



* Ann. & Mng.Xat. IIii<t. (7) iv. p. 286 (1800). 



