eee | Movustey, Breeding of the Black-throated Blue Warbler. 189 
complete. It can well be understood that this being the first record 
of the bird nesting here, I was very careful not to linger longer than 
necessary on each visit, and it was not until after the fourth egg 
had been laid, and the female had begun to incubate, that I was 
able to prove beyond a doubt that the nest and set belonged to 
Dendroica cerulescens, as on no occasion had either of the birds 
put in an appearance on any of my visits. However I had now no 
difficulty in getting many a good look at the female as after being 
flushed from the nest she seemed in no way concerned and usually 
remained in the vicinity for some time preening her feathers and 
flitting about. The male never once put in an appearance nor could 
I find or hear him singing anywhere in the wood. After securing 
this nest and set I decided to keep a careful watch, and see if I could 
catch the birds at their second venture, but it was not until June 28, 
that I came across either of them, and this time it was the male 
(or perhaps a male) who was singing in the tree tops some 125 yards 
south of the site of the nest found on the fourteenth. I visited this 
new locality on several occasions. but could find no trace of the 
female or a nest, and had almost given up all hope, when by a lucky 
chance I came across a nest on July 10. This was quite close to a 
little footpath along which I was walking (the previous one having 
also been within seven yards of a logging road) and as in the case of 
the first one was in the fork of a little maple sapling, but only one 
foot three inches above the ground instead of three feet, and was 
ninety yards east of the site of the first nest, and one hundred yards 
from the spot where I had heard the male singing on June 28. 
On flushing the female I naturally concluded I had found the 
second nest of the only pair of birds I considered to be frequenting 
the wood, but on examining it, and the set of four eggs, I found both 
differed in a marked degree from those of the first, as not only was 
the nest (which I have since presented in situ to the Victoria Memo- 
rial Museum at Ottawa) a thoroughly typical one, being composed 
almost entirely of small pieces of rotten or pithy wood, but it was 
also much less in depth, the dimensions being; outside diameter 
three and one-eighth inches, inside one and seven-eighths inches; 
outside depth two and one-half inches, inside one and one-half 
inches; the pithy wood being held together by fibrous materials 
and spiders silk, no birch or cedar bark being present, and the inside 
