722 Field Museum of Natural History — Zoology, Vol. IX. 



PART 2. EGGS MORE THAX 1.50 IN. LONG. 



Eggs, 4 to 7. Size, about 1.55 x 1.25. Eggs, pure white. Nest on 

 ground in fields and low prtiiries. .45/0 flainniciis. 



Short-eared Owl. 



Eggs, 4 to 7. Size, about 1.75 x 1.40. Eggs, pure white. Nest 



usually about marshy places. Circus hudsonins. 



Marsh Hawk. 



Eggs, 6 to 12. Size, about 1.80 x 1.30. Eggs, creamy white, or 



huffy white, not pure white. Nest, near water. Querquedida discors. 



Blue-winged Teal. 



SECTION 5. NEST IN HOLE IN BANK. 



PART I. EGGS LESS THAN i IN. LONG. 



Eggs, 4 to 6. Size, about .70 x .48. In size the eggs of this and the 

 next species are hardly distinguishable, although the Rough-wing is 

 slightly the larger. Bird, under parts, white, with conspicuous band of 

 brown on breast. Riparia riparia. 



Bank Swallow. 



Eggs, 4 to 7. Size, about ,72X.5i. Bird, under parts brownish 



gray, no band on breast. Stelgidopteryx serripennis. 



Rough-winged Swallow. 



PART 2. EGGS MORE THAN i IN. LONG. 



Eggs, 5 to 8. Size, about 1.34 x 1.05. Nest, deep hole in bank near 

 water. Ccrylc alcyon. 



Belted Kingfisher. 



SECTION 6. NEST IN SWAMPY PLACES, IN REEDS OR 

 GRASS, ON GROUND OR ON FLOATING VEGETATION. 



PART I. EGGS LESS THAN i IN. LONG. 



Eggs, 6 to 8. Size, about .66 x .47. Nest, on or near ground in 

 grass, made of grasses and globular in shape; entrance on the side. 



Cistothoriis stcllaris. 

 Short-billed Marsh Wren. 



PART 2. EGGS BETWEEN i AND 1.50 IN. LONG. 



Eggs, 3 to 6. Size, about 1.20 x 92; white, with faint bluish tinge. 

 Nest in reeds or small bush in swamp or pond. Ixobrychus exilis. 



Least Bittern. 



