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Show 1878.] MR. A. BOUCARD O N BIRDS F R O M COSTA RICA. 67 beak. It resembles the sound of mandibles opening and shutting noise several times in succession. Ordo MACROCHIRES. Family CAPRIMULGIDJE. 227. N Y C T I D R O M U S 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 HIRUNDINIDA. 228. ATTICORA CYANOLEUCA, Vieill., var. M O N T A N A , Baird. Several specimens from San Jose, March; Cartago, April. During these months they are building their nests in the roofs of the houses. They 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 quantities. 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. H E M I P R O C N E ZONARIS, Shaw (?). In one of my excursions, at the Volcano of Irazu I saw a large 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 EMILIA, 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 5* |