Mr. J. Gould on new Species of Humming-Birds. 303 



rufous colouring of the rump and upper tail-coverts. It belongs to 

 that section of the genus Pha'ethornis to which Prince Bonaparte 

 has given the subgeneric name of Pygmornis. 



AUGASMA SMARAGDINEUM, Gould. 



Crown of the head and throat glittering greenish-blue, imper- 

 ceptibly passing into the glittering green at the breast ; back of the 

 neck and upper surface golden-green ; upper tail- coverts grass-green ; 

 under tail-coverts green inclining to purple on some of the feathers ; 

 thighs brown; tail bluish-black, the two outer feathers on each 

 side slightly tipped with white ; bill black, with the exception of the 

 basal half of the under mandible, which is flesh-colour. 



Total length 3f inches; bill J ; wing 2\ ; tail 1|. 



Hab. Brazil. 



Remark. — This bird is about the size of Thalurania furcata ; it is 

 therefore a rather large species ; it is also an elegantly formed bird. 

 Those who are acquainted with the T. chlorocephala of M. Bourcier 

 will find in this a very near ally ; I have not the least doubt, how- 

 ever, of its being quite distinct. The only examples I have seen are 

 one in my own collection, and another in that of M. Verreaux of Paris. 

 In M. Verreaux's specimen the white tippings of the outer tail-feathers 

 are nearly obsolete, while in mine they are conspicuous ; in my speci- 

 men, also, the two middle tail-feathers are marked with green on their 

 upper surface, while in M. Verreaux's these feathers are uniform in 

 colour throughout. My bird was kindly sent to me by T. Reeves, 

 Esq., of Rio de Janeiro. 



EUCEPHALA CERTJ LEO-LAV ATA, Gould. 



Crown of the head greenish-blue, not very brilliant, but having a 

 few conspicuous small bright-blue feathers intermingled ; throat and 

 chest bright greenish-blue, passing into purer green on the flanks ; 

 back of the neck, and back, deep grass-green ; wings purplish brown ; 

 upper tail-coverts bronzy-orange ; under tail-coverts bronzy purplish 

 brown ; two middle tail-feathers deep purplish bronze ; the next on 

 each side is washed with bronze on its outer margin ; the remain- 

 ing feathers purplish-black ; thighs greyish-white ; the bill appears 

 to have been reddish flesh-colour at the base of both mandibles (this 

 colour also pervades nearly the whole of the under mandible) ; the 

 remainder of the bill black. 



Total length 3$ inches ; bill X; wing 2\ ; tail 1J. 



Hab. St. Paulo in Southern Brazil. 



Remark. — I am indebted to T. Reeves, Esq., of Rio de Janeiro, for 

 a fine specimen of this new bird, which differs so widely from every 

 other known species, that I am unable to compare it with any one of 

 them. It is a stout and rather large bird, with a well-proportioned 

 bill and tail, the latter of which is considerably forked. 



I am not quite satisfied that a place in the genus Eucephala is the 

 proper position for this bird among the Trochilidae, and I feel that 

 I might, without overstepping the bounds of propriety, have con- 

 stituted it the type of a new genus. 



