128 Hans von Berlepscli on hvo new 



cartilage developed within. I hope soon to receive this 

 memoir for publication. 



Thus we see that these waifs of an ancient and very 

 Reptilian Avifauna have not only an arrested, but also 

 an archaic condition of the wing. When most developed, as 

 in Rhea and Struthio, in which the carpus comes very near 

 that of the perfect modern bird, I have seen no signs as 

 yet of those secondary digital rays that help to form the 

 framework for the implantation of the " primaries ^^ in the 

 " manus " of a typical Carinate Bird. These additional 

 parts, which will be described in the paper referred to above, 

 will help us to understand the huge progress made by the 

 bird since the time when the old Struthious types possessed 

 the earth. 



— X. — Descriptions of two new Species of Birds from Bogota, 

 Colombia. By Hans von Berlepsch. 



1. BUARREMON SIMPLEX, Sp. nOV. 



Diagn. B. elaoproro, Scl. et Salv., ex Antioquia, similli- 

 mus, sed speculo alari albo omnino caret. Al. 71-78, 

 caud. 77^-80i, rostr. 13^, tars. 26 mm. 



Hab. Bogota, Colombia, duo specimina in Mus. H. v. 

 Berlepsch. 



About a year ago I got two skins of this new species from 

 Mr. A. Boucard, of Paris, together with many other Bogota 

 skins, all of them being of the usual Indian make, by which 

 they are easily known as having been collected in the 

 \acinity of Bogota. 



In the olivaceous colour of its back B. simplex comes very 

 close to B. elaojjrorus, Scl. & Salv., P. Z. S. 1879, p. 504, ex 

 Antioquia, but in the new species the large white alar 

 speculum chai'acteristic of that species is altogether absent. 

 There are perhaps slight traces of white at the extreme base 

 of the primaries, but it does not extend to the end of the 

 coverts to form a speculum. 



