On new Myotis &e. from Central and South America. 541 
To be treated as non-existent. 
Species the types of which are not now to be found in the British Museum. 
Lyge@us cognatus, Walk. Cat. Het. v. p. 49. n. 69 (1872). 
Japonicus, Walk. loc. cit. p. 58. n. 118. 
longiusculus, Walk. loc. cit. p. 60. n. 126. 
singularis, Walk. loc, cit. p. 63. n, 140. 
Nystus mundus, Walk. loc. cit. p. 69. n. 27. 
subeinctus, Walk, loc. cit. p. 70, n. 31. 
pallipennis, Walk. loc. cit. p. 71. n. 82. 
LXIX.—WNew Myotis, Artibeus, Sylvilagus, and Metachirus 
from Central and South America. By OLDFIELD ‘THOMAS. | 
Myotis simus, sp. n. 
A small short-haired Myot’s, with very much the general 
facies of a Pipistrellus or one of the smaller Scotophilt. 
Size small. General build and appearance very different 
to those of other American species of Myotis, and more as in 
Pipistrellus or Scotophilus. Head broad and flat, muzzle 
swollen and tumid. Lars rather short, reaching when laid 
forward about halfway between the eye and the tip of the 
nose ; their inner margin evenly convex for their proximal 
three fourths, slightly concave above; tip narrow; outer 
margin concave for the upper and convex for the lower half; 
antitragal notch scarcely perceptible; basal lobe forming a 
prominent thickened point projecting forwards. Tragus 
pointed, slightly curving outwards above, its inner margin 
convex, its outer concave above, convex below; a small 
triangular lobule at the outer base. 
Wing-bones comparatively stout, as also are the tibia. 
Wings attached to the ankle. Postcalcareal lobule practi- 
cally absent. ‘[ail included in interfemoral membrane to the 
extreme tip. 
Fur of body short and sparse (hairs of back about 2°5 mm. 
in Jength), not extending on the wing-membranes, and only on 
the interfemoral for its basal third, above and below. No 
fringe on interfemoral. 
Colour above and below pale tawny brown, about as in some 
of the small pale species of Scotophilus. Wing-membranes 
darker brown, without lighter edging. 
Skull rather broader than usual, with a shorter muzzle. 
In the ordinary small American Myotis the distance across 
the palate at the outer corners of m.” is just equal to the length 
