98 



NORTH AMERICAN BIRDS. 



7899 



628 



7897 



437 



7449. Strix pratincola. Natural size. 



4886. Otus wilsonianus. Natural size. 



7272. Scotiaptex cinereum. Two thirds. 



7899. Nyctale richardsoni. Natural size. 



414. Scops asio. Natural size. 



773. Bubo virg^inianus. Two thirds. 



628. Nyctea nivea. Two thirds. 



7897. Surnia ulula. Natural size. 



428. Glaucidium ferrugineum. Natural size. 



437. Spheotyto hypug^eo. Natural size. 



