462 Analytical Notices of Books. 



directed in an angular form towards the middle of the tail, the 

 superior half of which it envelopes, leaving the remainder free 

 and without any memhranous border : the lips are pointed, and 

 furnished with warty excrescences. The fur of the upper surface 

 is of a deep chesnut colour; that of the under side being paler: 

 the ears and membranes are of a chesnut brown. 



7. Di^s, Alecto, The size of this new species exceeds that of 

 the Vespertilio myotis^ but the extent of its wings equals that 

 of the Vesj). serotinus. The wings are very narrow and are deeply 

 notched : the tail is free for more than half of its length : the 

 membranes extend down upon the tarsi : the breadth of the ears 

 is greater than their height ; ihey are united in front, and are 

 continued in a slender strip towards the nostrils, which are almost 

 united together ; the head is short, and is surmounted by a very 

 elevated coronal crest which passes down along the middle of the 

 front. The fur is very fine, resembling a silky velvet, except in 

 the lower and hinder part, where the hairs are long ; its colour 

 throughout is a brilliant black : the membranes and face are also 

 black. It inhabits the interior of Brasil. 



8. Dys. abrasus. Another new species, resembling the pre- 

 ceding in its proportions, but inferior to it in size. The chief 

 distinctions consist, in less than one-half of the tail being free; in 

 the tarsus being unattached by membrane; in the ears being almost 

 as broad as high, and not united in front ; and in the nostrils being 

 distant from each other. The fur is very short and closely set : 

 its colour on the upper parts is a very bright and glossy chesnut ; 

 on the lower it is paler and more dull : the membranes are black. 

 It inhabits the same districts as the preceding species. 



9. Dys. nasutus. This is synonymous with the Molossus nasu- 

 iuSy Spix, and with the Nyctinomus Brasiliensis of M. Isidore 

 Geoffroy Saint-Hilaire. 



10. Dys. velox. The characters of this species it is unnecessary 

 to repeat as they have been given by Dr. Horstield at page 237 of 

 our present volume. 



11. Dys. ohscurus : the Molossus obscurus, Geoflfroy. It may 

 probably be identical with the Molossus fumariusy Spix. 



The Monograph is terminated by a compiled notice of such 



I 



