276 Messrs. Salvin unci Elliot on the Trochilidse. 



appear to hold positive views whether there are four or one 

 species. As regards Gluucis ceneu of Lawrence, from Costa 

 Rica, the type of which is before us, as well as another spe- 

 cimen from the same country, skinned by tlie same hand, we 

 find that the bronze colouring of the back and the rich rufous 

 of the under surface can be matched without difficulty in 

 our specimens from southern countries. The blackish man- 

 dible of Mr. Lawrence's type is not borne out by the other 

 specimens from the same locality, which have the mandible 

 yellow as in normal South- American specimens. 



The bird which has also been included in this genus as 

 Gluucis dohrni we believe to be the female of Grypus spixi, 

 as already suspected by Mr. Gould (P.Z.S. 1860, p. 304). 

 Whether the species is really referable to the genus Grypus 

 remains to be proved. The only known male specimen, the type 

 of G. spixi of Gould, has the tip of the maxilla broken, and 

 shows but a slight serration of the edges at the extremity of the 

 bill, not more than is found in perhaps the majority of the 

 so-called genera of Humming-birds. We do not observe in 

 the unbroken mandible the peculiar hook, which forms so 

 marked a character in both Grypus and Androdon. 



The geographical distribution of Gluucis is very similar 

 to that of Phuethornis, except that it does not proceed further 

 north than Costa Rica, nor have we seen any specimens of it 

 from western Ecuador. On the east coast it goes as far south 

 as Rio, and in the north to the islands of Trinidad and Tobago, 

 and extends over the whole country lying between these 

 points. 

 -f Glaucis hirsuta. 



Trochilus hirsutus, Gm. Syst. Nat. torn. i. p. 490. 



Gluucis hirsuta, Gould, Mon. Troch. vol. i. pi. 5 ; id. Intr. 

 Troch. p. 38. 



Trochilus muzeppa, Lesson, Troch. p. 18, pi. 3. 



Gluucis mazeppu, Gould, Mon. Troch. vol. i. pi. 6 ; id. Intr. 

 Troch. p. 38. 



Gluucis uffinis, Lawr. Ann. Nat. Hist, of New York, vol. vi. 

 p. 261 ; id. Gould, Mon. Troch. vol. i. pi. 7 ; id. Intr. Troch. 

 p. 38. 



