282 COLLECTION OF BATS, 
Desmodus rufus Wied. 
Three adult females. 
Desmodus Youngii, n. sp. 
One adult male. 
Inches. Mm. 
Length of forearm . . ~ + ee OREN 
> » thumb with ies - » » Stent0s 4de 
> » third finger, metacarpal . . 2,— 50,— 
» a) $ » Ist phalanx. . 0,4 10,— 
» oy <3 » 2ud > to 1 05), GR 
» » » » ord » ren 20,— 
> » fourth finger, metacarpal . 2,— 50,— 
» AE. » Ist phalanx . 0,375 9,37 
» » > » 2nd » . 085 Als 
> » fifth finger, metacarpal . . 1,85 46.25 
» a » Ist phalanx . . 0,875 9,37 
> sp » 2nd > ez 0 Dan ERR 
> >, Tibi Ars tea coe oen ot ON 
» LOOM iad BE 0.6 15, — 
Comparing these itn En Oe of the same 
parts in Desmodus rufus it appears that D. Young is a 
smaller species, for in the former the forearm measures about 
2,5 inches; very remarkable are the greater dimensions of 
the second and third phalanx of the third finger, being 
0,65 and 0,65 in D. rufus, 1,05 and 0,8 in D. Youngii, 
the second phalanx of the fourth finger 0,6 in rufus, 
0,85 in Youngit, meanwhile the foot in both species pre- 
sent the same length. 
The wings folded and pressed against the body attain 
the level of the crown of the head in D. rufus, in D. 
Youngü however they reach the mentum. 
Nose-leaf broader than in D. rufus, the notch *) in the 
centre of its upper margin forms an angle of 120 degrees — 
about 60 in rufus — upper part of side-margins slightly 
1) Withdrawn in Dobson’s Catalogue, pl. XXX, fig. 7. 
Notes from the Leyden Museum, Vol. XV. 
