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Show 1876.] NEOTROPICAL ANATIDJE. 407 ducto et linea utrinque ab oculis ad collum imum descendente nigris; alis extus carulescenti-schistaceis; tectricibus et secundariis albo anguste terminatis, speculo atari aneo-viridi; dorso postico cinereo, uropygio fasciolis minutis albis variegato ; subtus rufescenti-ochracea, lineis nigris ornata; mento, linea ad rostri basin, spatio suboculari cum gutture conjuncto et pectore superiore utraque ex parte nigerrimis ; rostro flavo, pedibus rubellis: long, tota 16*5, ala 7, cauda 4*5, rostri a rictu 1*6, tarsi 1*9. Fern, supra ardesiaca, dorsi plumis nigro flammu-latis; collo et uropygio lineis albis nigrisque vermiculatis; subtus omnino castanea. Hab. Rivers of the Chilian Andes (Bridges, Gay). W e are indebted to the researches of Mr. Bridges among the Chilian Andes for the discovery of this curious form. He sent home specimens of the present species in 1841, which were described by Mr. Gould before this Society in November of that year. Mr. Bridges remarks that it swims and dives against the flow of the Chilian mountain-torrents with a rapidity truly astonishing. 2. MERGANETTA TURNERI. Merganetta turneri, Scl. & Salv. P. Z. S. 1869, p. 600 (Peru), Ex. Orn. p. 199, t. 100, et Nomencl. p. 131. Merganetta leucogenys, Scl. & Salv. (nee Tsch.) P. Z. S. 1869, p. 157. Supra nigra, interscapulio et scapularibus rufo marginatis ; capite colloque toto albis, linea rostrum cingente, pileo medio in strigam nuchalem producto et linea utrinque ad imum collum descendente nigerrimis ; alis extus carulescenti-cinereis ; speculo atari aneo-viridi ; tectricibus alarum et secundariis albo anguste terminatis; abdomine nigro, ventre medio fusco variegato; crisso et uropyyio nigris, albo minute vermiculatis; cauda fuscescenti-cinerea unicolori; tectricibus subalaribus cinereis; rostro pedibus obscure rubris: long, tota 16*0, ala 7*5, cauda 5*0, rostri a rictu 1*5, tarsi 18, digiti medii cum ungue 2*3. Fem. supra cinerea, lateribus cervicis et uropygio albo nigroque minute vermiculatis ; dorso nigro flammulato ; alis albo bifasciatis ; speculo atari obscure aneo-viridi; subtus fulvo rufa unicolor: long, tota 16*0, ala 6*4, cauda 4*0, rostri a rictu 135. Hab. S. Peru ; Rivers of the Cuzcan Andes ( Whitely). When we first received examples of this bird from Mr. H. Whitely we referred it to the species described by Tschudi as Merganetta leucogenys. Having, however, made a reinvestigation of the group, we convinced ourselves that Tschudi's bird is, so far as can be decided by his figure and description, inseparable from the Merganetta columbiana of New Granada, and that the present species must be regarded as undescribed, being equally distiuct from the New-Gra-nadan form, and from the Chilian Merganetta armata. From the former it differs in its larger size, and black breast and flanks, which are only relieved by some brownish marks in the middle of the belly. In the New-Granadan bird, which is well represented in Des Murs's |
