This form is the most distinctly characterized of all the races of S. flammea which we have examined. It has the general plumage decidedly lighter and less rufous, while the secondaries and tail are abruptly lighter than the adjacent parts, and usually free from bands, though there are sometimes traces of them.

All the American races of Strix flammea differ very decidedly from the European form (var. flammea) in much larger size. The differences in color are not so appreciable, and there is hardly any certain difference in this respect. The extreme phases, however, appear to be darker in the var. flammea than in the var. pratincola. The supposed differences in the character of the feathers fringing the operculum, insisted on by MacGillivray (History of British Birds, III, 1840, p. 473), I am unable to appreciate, for I cannot find that they differ in the least in the two races. That excellent ornithologist states that in the American “species” the feathers of the operculum are reduced to a simple tube, having neither filaments nor shaft, while in the European bird they are perfect feathers, with all their parts complete. Though this may have been the case with the one or more specimens of pratincola examined by Mr. MacGillivray, I have yet to see an American specimen which has not the feathers of the operculum just as perfectly developed as in European examples.

[17] Strix flammea, var. delicatula. Strix delicatula, Gould, P. Z. S. 1836, 140.—Ib. B. Australia, I, pl. xxxi.—Strickl. Orn. Syn. 1855, 180. Hab. Australia.

[18] Strix flammea, var. javanica. Strix javanica, Gmel. S. N. I, 295, 1789.—Lath. Ind. Orn. p. 64, and Gen. Hist. I, 357.—Horsf. L. Trans. XIII, 139.—Gray, Gen. B. fol. sp. 5, pl. xv.—Sykes, P. Comm. Zoöl. Soc. pl. ii, 81.—Strickl. Orn. Syn. I, 1855, 180. Phodilus javanicus, Blyth, Journ. As. Soc. Beng. XIX, 513. Strix flammea, Pears. & Blyth. Hab. Java and Southern India, and Eastern Africa.

[19] Otus vulgaris. Strix otus, Linn. S. N. p. 132, 1766.—Asio otus, Less. Strickl.—Bubo otus, Savign. Ulula otus, Macgill. Otus vulgaris, Flem. Brit. An. p. 56, 1828, et Auct. O. europæus, Steph. 1. O. albicollis, Daud. O. italicus, Daud. O. communis, Less. O. aurita, Mont. O. asio, Leach. O. sylvestris, O. arboreus, and O. gracilis, Brehm.

[20] Otus stygius. Nyctalops stygius, Wagl. Isis, 1832, p. 1221.—Gray, Gen. B. p. 6, ed. 2, p. 8.—Bonap. Consp. Av. p. 50. Otus stygius, Puch. Rev. Zoöl. 1849, 29.—Gray, Gen. B. fol. sp. 12.—Kaup, Monog. Strig. Cont. Orn. 1852, p. 113. Asio styg. ? Otus siguapa, D’Orb. Hist. Nat. Cuba Ois. p. 31, Tab. 2, 1840.—Gray, Gen. fol. sp. 9.—Bonap. Consp. 50 (Cuba). Otus communis, var., Less. Tr. Orn. p. 110. Hab. South America (Brazil, ? Cuba, St. Paulo, Kaup).

[21] Syrnium nebulosum, var. sartorii, Ridgway (Mexican Barred Owl). Hab. Mirador, Mexico. Char. Adult (♀, 43,131, Mirador, near Vera Cruz, Mexico, “pine region”; Dr. C. Sartorius). In general appearance like nebulosum, but the brown very much darker, and less reddish,—that of the markings below very nearly black; the pattern, however, precisely the same, and there is about the same proportion between the light and the dark bars as is seen in the average of nebulosum. The face is plain dirty white without the brown bars or semicircles,—a constant and conspicuous feature in nebulosum. There is the same number of spots on the primaries, and of bands on the tail, as in nebulosum. The white beneath is without any ochraceous tinge; the primary coverts are plain dark brown. Wing-formula: 4–3=5; 1 intermediate between 8 and 9. Wing, 14.80; tail, 9.00; culmen, 1.05; tarsus, 2.20; middle toe, 1.60. This race of the S. nebulosum presents very appreciable differences from the bird of the United States. As stated above, the brown is much darker and less reddish, while the face is wholly destitute of the concentric dusky rings seen in nebulosum proper. To Dr. Charles Sartorius, who, by the presentation to the Smithsonian Institution of numerous elegantly prepared specimens, has added so much to our knowledge of the birds of the vicinity of Mirador, I take great pleasure in dedicating this new form.

[22] Syrnium nebulosum, var. fulvescens. Syrnium fulvescens, Salvin, P. Z. S. 1868, 58. Char. General appearance of var. nebulosum, but smaller and much more ochraceous. Ground-color of the plumage ochraceous, inclining to a deep fulvous tint on the upper parts, but paler below. Feathers of the upper surface tipped with dark umber-brown, and sometimes with an additional bar about the middle of the feather. The fulvous bars much exposed, so as to exceed the brown in amount. Face grayish-white, tinged outwardly with ochraceous. Beneath with the markings of nebulosum on a deep and uniform ochraceous ground. Wing, 12.75; tail, 8.50; culmen, .95; tarsus, 2.45; middle toe, 1.20 (Coll. Bost. Soc., No. 367, Guatemala; Van Patten).

[23] Nyctale tengmalmi, var. tengmalmi. Strix tengmalmi, Gmel. S. N. p. 291, 1789 (et Auct. var.). Nyctale t., Bonap. et Auct. Noctua t., Cuv. et Auct. Athene t., Boie. Ulula t., Bonap. et Auct. Scotophilus t., Swains. Strix dasypus, Bechst. (1791) et Auct. Nyctale d., Gray. Strix passerina, A. Meyer, 1794.—Pallas. Nyctale planiceps, Brehm, 1831. N. pinetorum, Brehm, 1831. N. abietum, Brehm, 1831. N. funerea, Bonap. 1842 (not of Linn., 1761, which is Surnia ulula). “N. kirtlandi,” Elliot, Ibis, II, Jan., 1872, p. 48 (not of Hoy!).

[24] Nyctale harrisi, Cassin, Pr. Ac. Nat. Sc. Philad. IV, p. 157, Feb., 1849.—Ib. Tr. A. N. S. II, 2d series, Nov., 1850, pl. v.