286 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



yolk of an &gg of about full size. There was no sign of shell 

 but it was probably the first of the clutch and would have 

 been laid inside of forty-eight hours. 



The country roundabout was searched for more of this 

 species of hummingbird, especially where the wild lilac was 

 abundant, but on this occasion only one other individual was 

 positively identified, and this was a female, taken on the Mt. 

 Hannah side of Cobb Valley at an altitude of about 3000 feet. 

 This bird was noted among the inner and at the same time 

 lowest dead branches of a large, umbrella-like black oak, 

 which had no limbs for quite a height. After being watched 

 for some time and no nest discovered this female was taken 

 for the record. 



Later developments with another bird under somewhat simi- 

 lar conditions lead me to believe that this female actually did 

 have a nest high up in this oak tree, probably in the building 

 stage. A few other hummingbirds were seen in the brush 

 but none near enough for identification, and none was found 

 performing courting evolutions except in the spot above 

 described. 



A second visit was made to Glenbrook, June 3 to June 5, 

 in company with my brother, John W. Mailliard, and the 

 results of this visit, as far as concerns the Calliope Humming- 

 bird, may better be given here as a sequel to what has just 

 been written. On the morning of June 4 the spot where 

 these hummingbirds had been found on our April visit was 

 examined, but not a trace of one was seen. The flowers had 

 all disappeared, and so had the hummingbirds. Later in the 

 morning a trip was made by auto up the old road to Adams' 

 Springs, alongside of which the female Calliope mentioned 

 above was taken in the oak tree, but hardly a hummingbird 

 was seen and none identified. Returning to Glenbrook for 

 lunch we found the early afternoon too hot for any satisfac- 

 tory work abroad, and leaving Little to finish up some inside 

 work my brother and I adjourned to a shady spot under some 

 alder trees by the brookside, only a few rods from the house, 

 as being a pleasant and favorable place in which to watch for 

 birds. While we were sitting there, some few yards apart, a 

 female Calliope Hummer came and fed upon a wild columbine 

 almost within arm's reach of my brother. Shortly before this 

 I had noticed a faint buzzing sound overhead when passing 



