. Rapporti di esplorazioni e indagini, per accertare la via più praticabile ed economica per una ferrovia dal fiume Mississippi all'Oceano Pacifico. giallo mandibola, con i lati crepusky;piedi neri, giallo verdolino sul lato interno; iride marrone. ^^jj Stati dell'Atlantico dalla Nuova Scozia sud; Texas in inverno; paesi della pelliccia, lato del Pacifico del continente; territorio di Wash-ington. Nelle note su P. occidentalis ho notato tutto quello che ho notato di questo Speci
1370 x 1824 px | 23,2 x 30,9 cm | 9,1 x 12,2 inches | 150dpi
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. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean . ner ; lower parts silvery white, sides brown; uppermandible brownish black, pale at the end and yellow on the sides at the base ; lower mandible yellow, with the sides dusky;feet black, greenish yellow on inner side ; iris brown. ^^jj Atlantic States from Nova Scotia southward ; Texas in winter; fur countries, Pacific side of the continent; Wash-ington Territory. In the notes on P. occidentalis I have noticed all I remarked of this species. On the onlyoccasion when I saw them they were with the others, which they so closely resembled inappearance that at a distance they were scarcely distinguishable. I could see also no differencein their cries or habits at that season, and never saw them at any other time or place. Al-thouo-h killed late in March, both species were in the immature plumage, as were the manyspecimens of the three species I obtained in the Territory at almost all seasons, except summer, when they all disappear.—C. : S P K R Exp- a Surveys i^T-^ PaxaJlel Biids Plate nXM. ZOOLOGY. 281 PODICEPS OCCIDENTALIS, Lawrence. Tlie Western Grebe. Podicepsoccidentalis, (Lawrence, ) Baird & Lawrence, Gen. Rep. Birds, p. 894. Sp. Ch—Winter: Upper part of the head and nape fuliginous black; back and wing coverts grayish black, the feathersmargined with gray ; primaries light ashy brown, darker at the end and white at base ; secondaries white, marked with ash onthe outer webs; in some specimens the middle secondaries are pure white ; space between the bill and the eye gray ; throat, sidesof the neck, and entire under plumage silvery white ; sides marked with grayish black ; bill dusky, appearing nearly black in thedried specimens, except on the cutting edges and at the end, where it is yellow ; iris orange red ; tarsi and feet blackish oliveexternally, and internally greenish yellow. Length, 24 to 28 inches; ex
