lo. ASIO. 



237 



I believe that the change from the }"oung or darker plumage is ac- 

 complished more by the gradual dissolution of the brown markings 

 on the feathers than by a direct moult : this change atfccts the tail 

 also, the bars narrowing bj' reason of the dissolution of the brown 

 colour, remains of which are always more or less apparent on the 

 interspaces. Another tolerably good indication of an adult bird 

 can also be found in the amount of brown on the inner side of the 

 wing, the younger birds having the end of the wing clouded with 

 brown without transverse bars, and showing also a distinct spot or 

 bar of brown about halfway down on the outer primary. This bar 

 is absent in an adult bird, and the end of the feather has buff- 

 coloured bars on the inner, spots on the outer web. Another dif- 

 ference in the adult bird is the attenuation of the shaft-stripes on. 

 the breast-feathers, which become narrower with age ; and these 

 narrow breast-markings are generally contemporary with the disap- 

 pearance of the wing-spot above mentioned ; but this is not always 

 the case, for, as in other birds of prey, the exact sequence in the 

 change of the parts seems to vary in individuals. 



Hah. The temperate and tropical regions of both hemispheres, 

 extending far into the Arctic circle : absent in West Africa, Australia, 

 and Oceania, but present in the Sandwich Islands. 



a. Ad. St. 



b. Juv. st. 

 r. Ad. St. 

 d. Ad. St. 



e,f, q. Pull. St. 

 h. $ ad. sk. 



/. $ juv. sk. 



k. Ad. sk. 



/. c? ad. sk. 



"'. 5 juv. sk. 

 n. <S ad. sk. 

 o. <S juv. sk. 



p. Ad. sk. 

 q, r. Ad. st. 

 s. Juv. St. 

 t. cJ ad. sk. 

 u. 2 ad. sk. 

 V. Ad. St. 

 u\ Ad. sk. 

 X. 2 ad. sk. 



y. Juv. sk. 



z.a\h\c. Ad. sl( 

 d' . Juv. St. 



a. Asio accipitri 



England. 



England. 



London Market. 



Hills of Offed. 



Hills of Offed. 



East Grinstead, Surrey, 



Dec. 1861. 

 Pagham, Sussex, Sept. 



3rd, 1872. 

 Chvistcburch, Hants, 



Jan. 1874. 

 Monraouthshu'e, Dec. 



4th. 1873. 

 SkSne, Sept. 1867. 

 SkSne, Nov. 27, 1873. 

 Wermland, Juue 30, 



1873. 

 France. 

 Archangel. 

 Archangel. 

 Malaara, Jan. 3, 1872. 

 Seville, Nov. 8, 1869. 

 Athens. 

 Corfu. 

 Ilavankoi, Asia Minor, 



Sept. 19, 1871 {T. 



Itohxon). 

 Ph'.in of Nimroud, Me- 

 sopotamia. 

 Nepal, 

 rhnia. 



Mr. J. Baker [C.l. 

 Mr. J. Baker [C.l. 

 Mr. J. Baker [C.l. 

 Mr. J. Baker [C. |. 

 Mr. J. Baker [C.]. 

 J. E. Ilarting, Esq. [P.]. 



E. B. Shai-pe, Esq. [P.]. 



Baron A. von Hiigel fP.]. 



Rev. A. Morgan [P.]. 



Purchased. 

 Purchased. 

 Purchased. 



M. A. Bouner. 

 R. B. Sbarpe, Esq. [P.]. 

 R. B. Sharpe, Esq. [P.]. 

 Howard Saunders, Esq. [C. 

 Howard Saunders, Esq. [C. 

 C. W. L. Merlin, Esq. [P.]. 

 J. Rocke, Esq. [P.]. 

 R. B. Sharpe, Esq. [P.l. 



J. R. Reeves, Esq, 



w 



