5 



of the Polybori. By Robert Ridgway. Bull. U. S. Geol. and 

 Geogr. Surv. of Terr., Vol. I, No. 6, pp. 451-473, plates xxii.- 

 xxvii., Februarys, 1876. 



RIDGWAY, ROBERT. Studies of the American Falconickc. By Robert 

 Ridgway. Bull. U. S. Geol. and Geogr. Surv. of Terr., Vol. II., 

 No. 2, pp. 91-182, plates xxxi., xxxii., April 1, 1876. 



SAUNDERS, HOWARD. On the Stercorariimo or Skua Gulls. By 

 Howard Saunders, F.L.S. &c. Proc. Zool. Soc. London, 1876, 

 pp.317-332, pi. xxiv. 



Mr. Saunders recognizes six species, all of which he refers to one 

 genus for which he adopts the name Stercorarius . . . . J. A. A., Bull. Null. 

 Ornith. Club, Vol. II., pp. '23, 24, January, 1877. 



SAUNDERS, HOWARD. Ou the Steruinye, or Terns, with Descriptions 

 of three new Species. By Howard Saunders, F.L.S., F.Z.S. 

 Proc. Zool. Soc. London, 1876, pp. 638-672, pi. Ixi. 



... Of the forty-eight species recognized, thirty-eight are placed 

 under S'erna J. A. A., Hull. Null. Ornuh. Club, Vol. II., p. '24, Jan- 

 uary, 1877. 



....We have here in condensed and convenient shape the main 

 results of a protracted study, representing much laborious and faith- 

 ful application; the author has evidently worked with care, and fully 

 availed himself of the unusual facilities he has enjoyed. .. .1 regard 

 the paper as the most authoritative one we possess on this subject. 

 .The colored plate illustrates the heads of three species of Anous . . . 

 Elliott Coues, Bull Null. Qrniih. Club, Vol. III., pp. 140-144, July, 1878. 



SCLATER, P. L. and SALVIN.OSBERT. On new Species of Bolivian Birds. 

 By P. L. Sclater, M.A., Ph.D., F.R.S.,'and Osbert Salvin, M.A., 

 F.R.S. Proc. Zool. Soc. London, 1876, pp. 352-358, pll. xxx- 

 xxxiii. 



SCLATER, P. L. and SALVIN, OSBERT. Revision of the Neotropical 

 Anatida). By P. L. Sclater and O. Salvin. Proc. Zool. Soc. 

 London, 1876, pp. 358-412, pi. xxxiv. 



... a most valuable synopsis of the Ducks and Geese of Middle and 

 Southern America, and embraces also a large proportion of the species 

 of North America, including as it does all that reach Tropical America 

 in their migrations . . The paper closes with a very convenient tabular 

 synopsis of the geographical distribution of the genera and species. 

 -J. A. A., Bull. Xult. Ornith. Club, Vol. IL, p. 24, January, 1877. 



VENNOR, HENRY G. Our Birds of Prey; or the Eagles, Hawks, and 

 Owls of Canada. By Henry G. Vennor, F.G.S. Of the Geological 

 Survey of Canada. With 30 Photographic Illustrations by Wm. 

 Notman. Montreal: Published by Dawson Brothers. 1876. 4to., 

 pp. i-viii and 1-154, 30 mounted photographs of birds. 



....The text, which is largely compiled from the notes of other 



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