58 yuNE, 



shorter primaries slightly sinnated at their points on the inner webs, tips of 

 secondaries emarginate. External edge of the first primary (or edge of the wing) 

 furnished with a row'of hooks or reversed bristles very obvious to the touch and 

 discernable with the naked eye. Tail long and broad, deeply emarginate. Legs 

 slender. 



Dimensions. Total length of skin from tip of bill to end of tail 5l in. Wing 

 4 4-10. Tail 3i inches. 



Color. Entire plumage fine black with a green gloss, inferior surface of the 

 wings and tail paler and without lustre. 



Ilab. Port Natal, Eastern Africa. 



Obs. Four specimens of this species are in the collection of the Academy, 

 several of which from the Rivoli collection were labelled " Hirundo velox, 

 Vieill." It is not the bird figured by Le Vaillant, which belongs to another 

 genus, and Is not therefore the species intended by Vieillot. 



Cypsehis lettcopygialis, nobis. 



Form. Robust, wings long, exceeding the tail, primaries slightly curved with 

 the second longest. Tail rather short, truncate, scarcely emarginate. 



Dimensions. From tip of bill to end of tail 5i inches. Wing 5*. Tail 2 

 inches. 



Colors. Rump white, throat pale, nearly white ; back and upper surface of the 

 wings and tail brownish black with a green gloss, head and entire under parts 

 dull sooty brown. Inferior tail coverts with a slight subterminal black band and 

 minutely tipped with white. 



Hah. Sumatra ? 



Ohs. This species resembles the Cypselus afRnis, Gray, but is much larger. 

 It is quite distinct from that or any other species known to me. One specimen 

 only is in the museum of the Academy, which bears a label having Sumatra as 

 the locality, and was received from Europe in a collection sent by Mr. Edward 

 Wilson. 



Acantliylis cinereocanda, nobis. 



Form. Wings very long, with the second primary longest. Tail rather short 

 with the feathers broad and the terminal acute points conspicuous, upper tail 

 coverts long and ample. 



Dime7isio7is. Total length of skin from tip of bill to end of tail 4 inches. 

 Wing 4 8-10. Tail 1 3-l0. 



Colours. Rump, upper and under tail coverts and tail above and below pale 

 brownish cinereous, or mouse color ; shafts of the tail feathers black. All other 

 parts of the plumage brownish black, deeper and with a greenish lustre above, 

 dull and paler below. 



Hab. South America. 



Obs. The species now described resembles Acanthylis spinicauda, (Temm.) 

 PI. Enl. 726, but may readily be distinguished by the entirely black plumage of 

 the under parts and by the pale colour of the tail. Though not so large a bird as 

 the A. spinicauda, its wings are longer. Two specimens are in the museum of 

 the Academy, one of which, sent from Paris by Mr. Edward Wilson, is marked 

 as coining from South America. 



