290 Hans von Berlepsch on new Trocliilidse. 



num griseo-brunneis (nee nigreseeutibus), submediis 

 ante apicem album Isete rufisj externis apice et extus 

 latissime rufis : corpore subtus pallidiore, nigredine guise 

 vel nulla vel inconspicua : tectricibus subcaudalibus 

 fulvis nee albis^ supraeaudalibus fere unicoloribus 

 badio-rufis. Long. tot. eirc. 100, al. 48-45|, rectr. 

 intermed. 47-44, submed. 34i-34, extern. 204-18|, 

 rostr. 24|-22| mm. 

 Habitat. Prov. Matogrosso, Brasil. centr. ; Cai9ara (Oc- 

 tober) and Engenho do Cap. Gama (September) (coll. Job. 

 Natterer, 6 specimens). 

 Mus. Vindob. et H. v. B. 



Having always siispected that the Humming-bird from 

 Matogrosso named " Phaetornis longuemarei, Less./' by 

 Pelzeln must really belong to an undescribed species, I lately 

 asked Herr von Pelzeln to send me some of Natterer's skins 

 for inspection. My distinguished friend most obligingly sent 

 me four specimens (out of six collected by Natterer) for 

 comparison, one of which I was allowed to retain for my 

 own collection. 



As I had anticipated, the Matogrosso bird proves to be 

 quite different from Ph. longuemarei, Less., with which 

 Herr von Pelzeln, for want of authentic specimens, had 

 identified it ; and I have now very much pleasure in 

 describing it as a new species, and in naming it after its illus- 

 trious discoverer, the late Johann Natterer; Herr von Pelzeln 

 having kindly allowed me to do so. 



The four specimens sent for my inspection all agree among 

 themselves in the characters distinguishing them from Ph. 

 longuemarei, of which I have before me several specimens 

 from Cayenne and Trinidad. 



The most important point of distinction seems to consist 

 in the form of the tail-feathers, which in Ph. natter eri are 

 rather narrow, while they are unusually broad in true Ph. lon- 

 guemarei. The coloration of the tail in Ph, nattereri is 

 altogether different, the two middle tail-feathers being pale 

 brownish grey in their middle portion, not black or blackish 

 as in true Ph. longuemarei, and presenting a paler bronze tint 

 to their bases. The next following pair of rectrices possess 



