[Illustration: _Syrnium aluco_ (copied from KAUP).]
[Illustration: _Athene noctua_ (from KAUP).]
[Illustration: _Nyctale richardsoni._]
[Illustration:
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 ferrugineum. Natural size.
437. Spheotyto hypogæa. Natural size.]
[Illustration:
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 ferrugineum. Natural size.
437. Spheotyto hypogæa. Natural size.]
[Illustration:
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 ferrugineum. Natural size.
437. Spheotyto hypogæa. Natural size.]
[Illustration:
7449. Strix pratincola.
4886. Otus wilsonianus.
7272. Scotiaptex cinereum.
7899. Nyctale richardsoni.
414. Scops asio.
773. Bubo virginianus.
628. Nyctea nivea.
7897. Surnia ulula.
428. Glaucidium ferrugineum.
437. Spheotyto hypogæa.
(All natural size.)]
[Illustration:
12088. Nyctea nivea. (Ear copied from Swainson, F. B. A)
504. Scotiaptex cinereum.
49808. Surnia ulula. (Ear copied from Swainson.)
A. Brachyotus “cassinii.” (Left ear and nostril, from fresh
specimen.)]