iritish Guiana. 105 
pair being large, broad and with a broad and slightly 
rounded cutting edge, the two teeth fitting closely to- 
gether and presenting an unbroken cutting edge; while 
the lateral incisors are very small and short, and are 
placed dire6lly between the median pair and the canines. 
The lower lip is slightly channelled and marked with 
warts on each side. The tongue is short and thick, not 
extensile and fibrillated as in Glossophaga. 
This bat is apparently to be found plentifully among the 
^rees on the outskirts of the town, and is the species to 
which reference has already been made as found living, 
males and females nearly equally matched, in colonies 
in the same trunk with two other species, one a Molossus 
and the other a Noftilio. 
The four following species are Emballonurines — two of 
them being referable to the genus Molossus. The com- 
monest of these is the small common house bat, Af. 
obscurus. It will readily be recognised by its small size, 
with a spread of wings of 9-1 1 inches; its dull blackish 
or mouse-coloured fur; its long and prehensile tail, ex- 
tending as much beyond as in. the interfemoral mem- 
brane ; and its large ears — the face being destitute of any 
rudiment even of a nose-leaf. If the living bat be held 
loosely, it will, invariably in my experience, while strug- 
gling to escape, grasp the fingers with its tail, so as to 
pull itself backwards. It is the commonest of the 
town bats, being seen at sundown darting by the scores 
from under the eaves and gutters of many of the dwel- 
ling houses, and large stores and wharf-sheds, just as at 
dawn they may be observed returning to their haunts. 
This is the species that is chiefly responsible for the 
pollution of the rain water collected from the roofs and 
O 
