1378.] MR. A. BOUCARD ON BIRDS FROM COSTA RICA. 6? 



beak. It resembles the sound of mandibles opening and shutting with 

 noise several times in succession. 



Ordo Macrochires. 

 Family Caprimulgid^e. 



227. Nyctidromus albicollis, Gm. 



Two specimens, male and female, from Cartago. They were in a 

 small forest, on the ground. They usually fly away as you get quite 

 close to them, and settle again a little further on. 



Family Hirundinid^e. 



228. Atticora cyanoleuca, Vieill., var. Montana, Baird. 

 Several specimens from San Jose, March ; Cartago, April. During 



these months they are building their nests in the roofs of the houses! 

 1 hey appear in February, and leave when the rainy season comes. 



229. Stelgidopteryx fulvipennis, Sclat. 



Stelgidopteryx fulvigula, Baird. 



Several specimens, from San Jose, March to May. They are 

 principally seen flying near the streams, sometimes in large quanti- 

 ties. The first time I had a shot at them I killed six ; there were 

 about fifty on a small tree. Although I have killed a good many, 

 I never found a female amongst them. I suppose the females must 

 have been in their nests somewhere ; but where, I was never able to 

 find out. 



Family Cypselid^e. 



230. Hemiprocne zonaris, Shaw (?). 



In one of my excursions, at the Volcano of Irazu I saw a lar°-e 

 quantity of birds which, I think, must have been this species. I am 

 certain about the genus ; but not having been able to get a specimen, 

 I leave the question of species for the future. 



Ordo Trochili. 



231. Phaethornis longirostris, Delattre. 



Naranjo, April. This bird is always seen in the denser part of the 

 forest. One of the favourite flowers on which it feeds is that of the 

 plane-tree. 



232. Phaethornis emille, Bourc. 



Several specimens from Tres Rios, January ; Naranjo, April. 



233. Pygmornis adolphi, Gould. 



San Carlos, February. This is a very common species — but very 

 difficult to detect, as it only comes out of the forest early in the 

 morning and late in the afternoon. In the middle of the day they 

 are very abundant in certain parts of the forest, many specimens being 

 seen at a few yards from one another. They are perched on small dry 



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