S88 KANSAS UNIVERSITY SCIENCE BULLETIN. 



and another louder, tseeree. The first one was kept up con- 

 tinually. They made a little disturbance over a little wounded 

 bird, but by the time I had secured it they were all gone and 

 I did not see them again. This species seems to be indistin- 

 guishable from those females of Psaltrivai-us melanotis lloydi, 

 which lack the black on the head, but as the adult males of 

 P. plumbeus were taken I have referred all the specimens to 

 this form. 



37. Regulus calendula (Linn). — Ruby-crowned Kinglet. 

 Three adult males, March 19 ; two, March 25. A few of these 

 were found during March. The last of June I heard a male 

 singing in the spruces just below the summit of Bill Williams 

 Mountain, at an elevation of 10,000 feet. 



38. Merula migratoria propinqua Ridgw. — Western Robin. 

 Three adult males, March 11; two, March 21. Two adult fe- 

 males, March 11 and 21. The first ones seen were in a small 

 flock in the pines near Supai. Later they became common, and 

 were found in considerable numbers on a plateau south of 

 town. Here they were rather wild, and when frightened usu- 

 ally lit in the numerous deadfalls. 



39. Sialia mexicana hairdii Ridgw. — Chestnut-backed 

 Bluebird. Three adult males, March 2, 19 and 21 ; two adult 

 females, March 8 and 17. These birds were first seen March 

 2, but were common a week later. They frequented the cut- 

 over pine lands, where the numerous stubs furnished them 

 perches. The only note I heard them give was a low tur-wee, 

 like the fall note of Sialia sialis. 



40. Sialia arctica Swains. — Arctic Bluebird. One adult 

 male, March 17. A few birds of this species were found in the 

 same localities as the preceding one. A favorite place was 

 near the shore of one of the numerous Crater lakes, and some 

 of them were found in the town itself. 



