144 Brewster on a Collection of Arizona Birds. 
% 
41, $ ad., Morse’s Mill, Chiricahua Mountains, March 14. Length. 
5.20; extent, 8.50; wing, 2.90; tail, 2.25; tarsus, .73; culmen. .50; depth 
of bill at nostrils, .15. ‘'Iris brown.” 
50, $ ad., Morse’s Mill, March 16. Length, 4.90; extent, 8; wing, 2.55 ; 
tail, 2.20; tarsus, ,73; depth of bill at nostrils, .15. 
1 18, $ ad., Morse’s Mill, March 28. Length, 5; extent, 7.90; wing, 
2.68; tail, 2.30; tarsus. .70; culmen, .50; depth of bill at nostrils, .15. 
140, $ ad., Chiricahua Mountains, March 31. Length. 5.10; extent, 
8.40; wing, 2.65; tail, 2.25; tarsus, .73; culmen, .49; depth of bill at nos- 
trils, .15. 
353, $ ad., Santa Rita Mountains, May 1 1. Length. 5; extent, 8.10; 
wing, 2.744 tail, 2.25; tarsus, .70; culmen, .48; depth of bill at nostrils, .15. 
Seven California specimens of V. button i measure as follows : — 
1443, J', Nicasio. Wing, 2.35; tail, 2.20; tarsus, .75; culmen, .50; 
depth of bill. .11. 
1445, Nicasio. Wing, 2.31; tail, 2.15; tarsus, .76; culmen, .51;' 
depth of bill, .11. 
1444, $, Nicasio. Wing, 2.35; tail, 2.25; tarsus, .76; culmen, .49; 
depth of bill, 10. 
1446, $, Nicasio. Wing, 2.32; tail, 2.28: tarsus, .74; culmen, .50; 
depth of bill, .14. 
6800, $ , Berkeley Co. Wing, 2.37; tail. 2.30; tarsus, .75; culmen, .46; 
depth of bill, 1 1 . 
6801, $, Berkeley Co. Wing, 2.28; tail, 2.15; tarsus, .75; culmen, .51; 
depth of bill . .11. 
6339, $, Riverside. Wing, 2.34; tail, 2.14; ta’rsus, .75; culmen, .52; 
depth of bill, .14. 
48. Vireo pusillus Cones. Least Vireo. — An abundant 
summer species frequenting willows along streams and, near 
Tucson, thickets of mesquites. “It is active, restless and very 
noisy.” 
Numerous nests were taken. The only one sent me is a shal- 
lower, but nevertheless rather more elaborate structure, than that 
of V. belli to which, however, it bears a strong resemblance. 
It is mainly composed of fibrous shreds, apparently obtained from 
the stalks of some herbaceous plant. The lining is of delicate, 
bleached grasses, which are very neatly arranged. The eggs are 
white with a cluster of small black spots about the larger ends. 
The clutch comprised three, a number which was not exceeded 
in any of the other nests. The notes relating to this set are as 
follows : “Tucson, June 1 1. Nest pensile between the forks of 
a small mesquite branch, about five feet from the ground, in a 
