JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 731 



SECTION 2. NEST IN HOLE IN TREE, STUMP OR 



POST. 



Eggs, 5 to 8. Size, about .60 x .48 ; white, speckled with pale brown. 



Penthestes atricapillus. 

 Chickadee. 



Eggs, 6 to 8. Size, about .64 x .49; vinaceous, speckled with pale 

 brown. Troglodytes aedon (or parkmanii). 



House Wren. 



SECTION 3. NEST ABOUT DWELLINGS AND BARNS. 



Eggs, 6 to 8. Size, about . 64x^9; vinaceous, speckled with pale 

 brown. Troglodytes aedon (or parkmanii'). 



House Wren. 



Eggs, 2. Size, about i.2ox.85; pale olive buff or grayish white, 

 thickly speckled (usually marked) with brown and washed in places 

 with pale purplish gray. Location, eggs sometimes deposited on roof 

 of house, usually in a field. Chordeiles virginianus. 



Nighthawk. 



SECTION 4. NEST IN OPEN FIELDS ON GROUND OR 

 IN BUNCH OF GRASS. 



PART i. EGGS LESS THAN i IN. LONG. 



Eggs, 3 to 5. Size, about .85X.62; pale olive or dull whitish, 

 thickly speckled and marked with pale brownish olive. 



Otocoris alpestris praticola. 

 Prairie Horned Lark. 



Eggs, usually i or 2. Size, about .87 x .66; deposited in some other 

 bird's nest. Color, white or pale buff, speckled with brown. 



Molothrus ater. 

 Cowbird. 



PART 2. EGGS FROM i TO 1.50 IN. LONG. 



Eggs, 2. Size, about i.igx.Sd; pale olive buff or grayish white, 

 thickly dotted and speckled with brown, and washed in places with pale 

 purplish gray. Location, eggs deposited on a rock or on the ground, 

 sometimes on flat roofs of houses. Chordeiles virginianus. 



Nighthawk. 



