Mr. 0. Salvin on the Birds of Nicaragua. 319 



This Isthmean species extends its range southwards into Costa 

 Rica ; but at Chiriqui the continental C. lanceolata supplants it. 



Phaethornis longirostris (De Latt.). 

 Chontales {Belt). 



Phaethornis adolphi, Bourc. 



Chontales {Belt). 



Chalybura melanorrhoa, Salv. 



Chontales {Belt). 



This species has hitherto only been sent from Costa Rica, 

 Two pairs are in Mr. Belt's collection. The female, of which we 

 have had a Costa-Rica skin for some time, does not appear to 

 have been as yet described. It much resembles the same sex of 

 C. isaurce, of which I have given a short description (P. Z. S, 

 1867, p. 152). It differs, so far as I can see, only in having 

 the tail deeper purplish bronze, and in the crissum being dingy 

 instead of pure white. 



Thalurania venusta, Gould. 

 Chontales {Belt). 



Mr. Belt's specimens show a further northward extension of 

 the range of this species. 



Florisuga mellivora (Linn.). 

 Chontales {Belt). 



Microchera parvirostris (Lawr.). 



Salv. P.Z. S. 1867, p. 154; Lawr. Ann. Lye. N. Y. ix, p. 

 122. 



Chontales {Belt). 



Several males and one female of this beautiful species are in 

 Mr. Belt's collection. The former agree accurately with Costa- 

 Rican examples, and differ from the true M. albocoronata in the 

 manner pointed out by Mr. Lawrence and myself (//. cc). This, 

 again, is an instance of a northward extension of the range of a 

 hitherto purely Costa- Rican species. 



Clais meritti (Lawr.). 

 Chontales {Belt). 



The difference between this and the southern race C. guimeti 

 is so very slight that I doubt if it will prove to be ultimately 



