To the Zoological Society of London and to Mr. Henry Seebohm we are likewise much indebted for the loan of the woodcuts of which impressions are contained in these volumes.

Fam. XX. TROCHILIDÆ, or HUMMING-BIRDS. Page

Argentine Ornithology, Volume II (of 2) — Part 2

230. _Oreotrochilus leucopleurus_, Gould. (White-sided Humming-bird.) 1

Argentine Ornithology, Volume II (of 2) — Part 2

231. _Chætocercus burmeisteri_, Scl. (Burmeister's Humming-bird.) [Plate XI.] 2

Argentine Ornithology, Volume II (of 2) — Part 2

232. _Sparganura sappho_ (Lesson). (Sappho Humming-bird.) 3

233. _Petasophora serrirostris_ (Vieill.). (Violet-eared Humming-bird.) 3

234. _Patagona gigas_ (Vieill.). (Giant Humming-bird.) 4

235. _Calliperidia furcifera_ (Shaw). (Angela Humming-bird.) 5

236. _Leucippus chionogaster_ (Tsch.). (White-breasted Humming-bird.) 7

237. _Leucochloris albicollis_ (Vieill.). (White-throated Humming-bird.) 7

238. _Chrysuronia ruficollis_ (Vieill.). (Golden-tailed Humming-bird.) 8

239. _Hylocharis sapphirina_ (Gm.). (Red-throated Humming-bird.) 8

240. _Chlorostilbon splendidus_ (Vieill.). (Glittering Humming-bird.) 9

241. _Hemiprocne zonaris_ (Shaw). (Ringed Spine-tailed Swift.) 11

242. _Podager nacunda_ (Vieill.). (Nacunda Goatsucker.) 12

243. _Chordeiles virginianus_ (Gm.). (Whip-poor-Will.) 13

244. _Antrostomus parvulus_ (Gould). (Little Goatsucker.) 14

245. _Stenopsis bifasciata_ (Gould). (Wing-banded Goatsucker.) 14

246. _Hydropsalis furcifera_ (Vieill.). (Fork-tailed Goatsucker.) [Plate XII.] 15

247. _Heleothreptus anomalus_ (Gould). (Short-winged Goatsucker.) 16

248. _Campephilus boiæi_ (Wagl.). (Boie's Woodpecker.) 17

249. _Campephilus schulzi_ (Cab.). (Schulz's Woodpecker.) 18

250. _Dryocopus erythrops_ (Val.). (Red-faced Woodpecker.) 18

251. _Picus mixtus_, Bodd. (Varied Woodpecker.) 19

252. _Picus cactorum_, d'Orb. et Lafr. (Cactus Woodpecker.) 19

253. _Chloronerpes affinis_ (Wagl.). (Allied Woodpecker.) 20

254. _Chloronerpes frontalis_, Cab. (Red-fronted Woodpecker.) 20

255. _Chloronerpes aurulentus_ (Licht.). (Gold-backed Woodpecker.) 21

256. _Chloronerpes tucumanus_, Cab. (Tucuman Woodpecker.) 21

257. _Chrysoptilus cristatus_ (Vieill.). (Red-crested Woodpecker.) 21

258. _Leuconerpes candidus_ (Otto). (White-bellied Woodpecker.) 23

259. _Colaptes longirostris_, Cab. (Long-billed Woodpecker.) 23

260. _Colaptes agricola_ (Malh.). (Pampas Woodpecker.) 24