186 MotTSLEY, Birds of Hatley, Quebec. [April 



122. Sialia sialis sialis (Linnaeus). Bluebird. — Common summer 

 visitant; March 24 to Oct. 22. Average date of arrival (for five years) 

 April 8; of departure (for four years) Oct. 15. Eggs: April 27 to July 30. 

 Bluebirds are fairly plentiful here and during the past two years have been 

 more abundant than ever. I once witnessed a pair of these birds drive 

 out a Hairy Woodpecker from a half completed nesting hole it had made, 

 and after gaining possession of it they immediately set to work building a 

 nest which was completed and four eggs laid in the remarkably short space 

 of six days. Is it also merely a coincidence the same as in the case of the 

 Robin that I noticed males on March 24 of this year, but no females until 

 April 5; or do the males of this species also really precede the females, as 

 no mention of it either is made in any of my books? 



Synopsis of principal events Years 1911-1915. 



1911. Early nesting of Goldfinch June 3, set of 6 Chipping Sparrow's 

 eggs found, also one of 3, all immaculate. 



1912. Great Vireo year. Yellow-throated and Blue-headed found 

 breeding, also Indigo Bunting, Scarlet Tanager seen, Pine Gro.sbeaks 

 plentiful, Red-winged Blackbirds very abundant. Yellow Palm and Wil- 

 son's Warblers seen. Hermit Thrush plentiful. 



191S. Bartramian Sandpiper found breeding, also Rose-breasted Gros- 

 beak. Evening Grosbeaks seen, Pine Grosbeaks again plentiful. Swamp 

 Sparrows and Black-capped Chickadees nesting more freely than usual. 



1914. Woodcock seen, Olive-backed thrush and Veery found breeding, 

 Vireos scarce. Crested Flycatcher plentiful, also Cedar Waxwings, Bobo- 

 links and Myrtle Warblers. Pine Siskins first observed. 



1915. Great Warbler year. Northern Parula found breeding, also 

 Prairie Horned Lark, Sora, Cowbird and Blue Jay, Vireos scarce, White- 

 throated Sparrows, Slate-colored Juncos and Hermit Thrush breeding 

 plentifully, Acadian Chickadee, Killdeer and Semipalmated Plovers seen, 

 also Green-winged Teal, Canada Spruce Grouse, Magpie and Canada Jay. 



Errata. 



Page 69, line 3, for leucomelas read villosus. 

 " 69, " 3, for Northern Hair.y read Hairy. 

 " 69, " 12, for Northern Downy read Downy. 

 " 73, " 15, for Common Resident read Resident. 

 " 73, " 31, for March 10 read March 1. 



