100 



NORTH AMERICAN BIRDS. 



7449- 



4886. 



414. 



7899. 



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 virginianus. Two thirds. 



628. Nyctea nivea. Two thirds. 



7897, Surnia ulula. Natural size. 



428. Glaucidium ferrug-ineum. Natural size. 



437- Spheotyto hypg.nea. Natural size. 



