508 Recently puhllsUed Ornithological WorliS. 



{Circus hudsonius). The different types of feathers clothing 

 different parts of the body are all separately discussed, and 

 their structure^ both macroscopic and microscopic^ elucidated, 

 and considerable space is occupied with suggestions as 

 to the meaning and use of the various types of feather 

 structure. 



Chapman on new Neotropical Birds. 



[Diagnoses of apparently new Colombian Birds. — II. By Frank M. 

 Chapman. Bulletin Amer. Mas, Nat. Hist., xxxiii. 1914, pp. 167-192, 

 map. 



Descriptions of a new Genus and Species of Birds from Venezuela. 

 Id. ibid. pp. 193-197.] 



The latest expedition of the American Museum of Natural 

 History, under the leadership of the author of these papers, 

 to Colombia, took place between January and May of last 

 year. The district explored was the " Bogota region, '^ 

 whence so many species have been described from native- 

 made " Bogota " skins. These are of course without data 

 and have in many cases changed colour, and it was thought 

 advisable to obtain a good series of scientifically -made 

 specimens. Some 2300, representing over 500 species, were 

 brought back. In the first paper diagnoses of 8 new species 

 and 20 new subspecies are given, all from different parts of 

 Colombia. 



The second paper contains descriptions of the novelties 

 obtained by another American Museum expedition, under 

 Mr. L. E. Miller. In December 1912 he ascended the 

 Orinoco to the neighbourhood of Mt. Duida, a most remote 

 spot in the southernmost par-t^of Venezuela, but owing to th^ 

 illness of his companion, Mr. F. X. Iglseder, he was com- 

 pelled to return before his work was completed. In addition, 

 some 600 specimens were secured at Cristol)al Colon on 

 the Paria peninsula, which juts out from Venezuela towards 

 the island of Trinidad. New species of Geotrygon, Neo- 

 morphus, and Nonnulla are diagnosed, and a new genus, 

 Microxenops, is proposed for a new species, M. milleri, a 

 form allied to Xenops and referred to the Furnariidse. 



