GENUS II. ULULA. NIGHT-OWL. Bill short, strong, very deep, its upper outline decurved from the base; lower mandible abruptly rounded, with a notch on each side. Nostrils broadly elliptical, rather large. Conch of ear very large, elliptical, extending from the base of the lower jaw to near the top of the head, with an anterior semicircular operculum in its whole length. Feet rather short, strong; tarsi and toes covered with very soft downy feathers. Plumage full, and very soft; facial disks complete. Wings rather long, very broad, much rounded, the third quill longest; the filaments of the first, half of the second, and the terminal part of the third, free and recurved. Tail of moderate length, arched, slightly rounded. 32. 1. Ulula Tengmalmi, Gmel. Tengmalm's Night-Owl. Plate CCCLXXX. Male and Female. General colour of upper parts greyish-brown tinged with olive; feathers of the head with an elliptical central white spot; those of the neck with a larger spot; scapulars with two or four large round spots near the end, and some of the dorsal feathers and wing-coverts with single spots on the outer web; all the quills margined with white spots on both webs, arranged in transverse series, there being six on the outer web of the third; on the tail five series of transversely elongated white spots. Disk yellowish-white, anteriorly black; ruff yellowish-white, mottled with dusky; throat brown, chin white; lower parts yellowish-white, longitudinally streaked with brown; some of the feathers of the sides with two white spots; tarsal and digital feathers greyish-yellow, with faint transverse brown bars. _Male_, 11, wing 6-10/12. _Female_, 12. From Maine on the east, and from Columbia River on the west, northward. Strix Tengmalmi, Tengmalm's Owl, Swains. & Rich. F. Bor. Amer. v. ii. p. 94. Tengmalm's Owl, Strix Tengmalmi, Aud. Orn. Biog. v. iv. p. 559. 33. 2. Ulula Acadica, Gmel. Acadian Night-Owl.--Little Owl. Saw-whet. Plate CXCIX. Male and Female. General colour of upper part olivaceous brown; scapulars and some of the wing-coverts spotted with white; the first six primary quills obliquely barred with white; tail darker, with two narrow white bars; upper part of head streaked with greyish-white; disks pale yellowish-grey; ruff white, spotted with dusky. Lower parts whitish, the sides and breast marked with broad elongated patches of brownish-red. _Male_, 7-1/2, 17. _Female_, 8-1/2, 18. From North Carolina on the east, and from Columbia River on the west, northward. Little Owl, Strix passerina, Wils. Amer. Orn. v. iv. p. 61. Strix acadica, Bonap. Syn. p. 38. Strix acadica, American Sparrow Owl, Swains. & Rich. F. Bor. Amer. v. ii. p. 97. Acadian Owl, Strix acadica, Nutt. Man. v. i. p. 137. Little or Acadian Owl, Strix acadica, Aud. Orn. Biog. v. ii. p. 567: v. v. p. 397. GENUS III. STRIX, Linn. SCREECH-OWL.