May, 1922 EGGS OF THE ALEUTIAN ROSY FINCH 93 
colored. Some otf the sets have one or two eggs with these small specks, and 
yet have one or two others that are very distinctly marked, for this species. 
One set has distinct spots of a delicate rosy pink tinge, another set has some 
of the eggs splotched rather than finely spotted or speckled, and these splotches 
are reddish in color. 
Of forty-four sets of five eggs each, together with one of six eggs, fifteen 
of the sets were unmarked, nine contained one spotted egg, none had two eggs 
spotted, eight had three eggs, seven had four eggs, eight all five, while the 
six-ege set had ali but one spotted. Some of these markings look lke an inci- 
dentai stain, as from wet grass or a fly speck, but the magnifying glass shows 
them to be natural coloration. The greatest number of spots or specks is us- 
ually at the iarger end of the egg, and in some cases these are arranged some- 
what asaring. In other cases a spot or two on any part of an egg may be the 
_only marking. 
Both size and shape of the eggs of this species are very variable. The 
longest egg measured, in millimeters, 28.3 and the shortest 22.3, with an 
average of 24.6 for 115 eggs measured; while the width showed extremes of 
18.8 and 15.9, with an average of 17.5. There is no particular correlation be- 
tween the two diameters, however. For example, the longest egg measures 
28.3 17.0, while the third shortest in the lot is 22.8>18.2, the one long and 
slim and the other short and fat. 
The measurements of the sets used in figure 33, from left to right are as 
follows: 
eae SN Osis) 28.5 417-0, 20.2 617.2, 26.4 K 1738, 24.8176, 24.1 K 17.2. 
feoeaeo NO P67) 23.0 14.5, 23.0 18:4, 22:8 K 17.7, 22.9 K 177, 238.417.8. 
(C. A. S. No. 3660) 26.1X17.4, 25.418.8, 25.017.9, 24.6X18.3, 25.1XK17.3. 
(C. A. S. No. 3539) 26.317.0, 24.918.5, 24.518.2, 23.218.5, 25.4 18.0. 
Average length of the 115 eggs measured is 24.6, and average width is 17.7. 
Set nearest to average of the 23 that were measured: 
(C2 Aes NO. 3945) 2ZE8 182, 24.31, 24.5>< 17.9, 24.8 K 17.7, 23.8 17.5, 
The tint of the white of these blown eggs varies somewhat, as before re- 
marked, but not through any great range. Newly laid eggs seem to vary from 
bluish white, through pure white to slight cream color, while those that have 
been more or less incubated are apt to become yet a little darker cream color. 
Possibly some sets have been exposed to an occasional wetting, when not well 
protected, or the parent may have come on the nest with some of its feathers 
dampened by rain, but on the whole there is great freedom from stain. 
San Francisco, March 23, 1922. 
FROM FIELD AND STUDY 
Yellow-headed Blackbird in Company with Brewer Blackbirds.—In volume xxII of 
Tue Conbor, page 205, Mr. Frank N. Bassett records the unusual occurrence of a Yel- 
low-headed Blackbird (Xanthocephalus xanthocephalus) flocking with Brewer Black- 
birds. Another instance of this was noted at Penticton, British Columbia, on October 
13, 1921, when a single male was seen in the midst of a flock of about fifty Brewer 
Blackbirds. This was of interest to me not only for the unusual association of the two 
species, but on account of the scarcity of the Yellow-headed Blackbird in that locality 
and the late date on which it was seen. Another point of interest lay in the uncon- 
