349 Zoological Society. 



heavy rains which prevailed at the time, to procure or to preserve the 

 examples in so fine a state as could be wished ; although much muti- 

 lated and otherwise damaged, they are, however, sufficiently perfect 

 to admit of my furnishing the following descriptions : — 



1. Trochilus (Selosphorus) scintilla. 



Male : upper surface bronzy green ; on the throat a gorget of glit- 

 tering fiery red, the feathers of which are much produced on either 

 side ; beneath the gorget a band of buffy white ; wings purple-brown ; 

 central tail-feathers brownish black, margined with rusty red ; lateral 

 tail-feathers brownish black on their outer and rusty red on their 

 inner webs ; under surface reddish brown ; bill black. 



Female : upper surface as in the male, but not so bright ; under 

 surface white ; throat-feathers less produced, and spotted with brown 

 on a white ground ; flanks buif ; tail rufous, crossed by a crescentic 

 bar of black near the tip. 



Total length of the male, 2f inches ; bill, | ; wing, 1^; tail, 1. 



Hub. Volcano of Chiriqui, at an altitude of 9000 feet. 



This is an extremely beautiful species, and forms a miniature re- 

 presentative of the Ti'ocMlus riifits, to which it is somewhat allied. 



2. Trochilus (Thaumatias ?) chionura. 



Male : upper surface very dark grass-green ; wings purplish 

 brown ; central tail-feathers bronzy green ; lateral tail-feathers white, 

 largely tipped with black ; throat pale shining green ; flanks green- 

 ish; centre of the abdomen and under tail-coverts white; upper 

 mandible black, base of the lower mandible fleshy white. 



Female : upper surface as in the male, but paler ; lateral tail-fea- 

 thers white, as in the male, but crossed near the extremity with an 

 oblique band, instead of being tipped vdth black ; throat and under 

 surface generally white. 



Total length, 3^ inches ; bill, f ; wing, 2^ ; tail, 1^. 



Hab. Chiriqui near David, province of Veragua, at an altitude of 

 from 2000 to 3000 feet. 



This is a remarkable species, differing, as it does, from all other 

 Humming-Birds with which I am acquainted, in the large amount of 

 white on the tail-feathers, which shows very conspicuously when that 

 organ is spread. In form it is very similar to the T. brevirostris and 

 T. longirostris of the Brazils. 



3. Trochilus (Thalurania) venusta. 



The entire crown, back of the neck, and upper part of the back, 

 shoulders, abdomen, and under tail-coverts, beautiful shining ultra- 

 marine blue ; throat and fore-part of the neck rich metallic green ; 

 wings purplish black ; tail considerably forked, and of a blackish 

 blue ; bill black. 



Total length, 4 inches ; bill, |; wing, 2\ ; tail. If. 



Hab. Volcano of Chiriqui in Veragua. 



Remark. — Nearly allied to, and of the same form and size as, the 

 T. furcatiis, but a far finer bird. 



4. Trochilus ( 1) cosruleogularis. 



Male : upper surface, shoulders, abdomen and under tail-coverts. 



