igif^ ] Rockwell and Wetmore, Birds of Golden, Colorado. 323 



break up until the first of June and the bh-ds were nesting by the middle of 

 the month. They bred apparently from the plains up into the mountain 

 parks and were most common in the mountains. By July 18 young were 

 seen out of the nest, and from then until October 10 they were common on 

 Lookout Mountain. During the fall months they were quicker and more 

 restless seldom remaining long in one locality. The adults were very 

 anxious about their young and were continually making short circling 

 flights out over us when we were near, caUing excitedly and betraying 

 themselves by their anxiety. Immature bu-ds were still moulting the first 

 week in October. 



51. Passer domesticus. English Sparrow. — Common in Golden 

 and around some of the ranch houses. 



52. Pooecetes gramineus confinis. Western Vesper Sparrow. — 

 Common on the plains and found in the highest altitude in the region in 

 question wherever there were open fields. There is very Uttle variation 

 in a small series of these birds except in freshness of plumage, which is due 

 entirely to the season. The first one was seen April 18, and by May 2 they 

 were common. Two broods were raised, the first in May, the second in 

 July. The males had a second song period about the middle of the latter 

 month and on August first there were apparently many nests with j'oung 

 on South Table Mountain, as females were seen frequently with food in 

 their bills. From then until the middle of September they were very 

 retiring and the last ones, a small flock scattered over a knoll on North 

 Table Mountain, were noted October 2 and one was taken. 



53. Passerculus sandwichensis alaudinus. Western Savannah 

 Sparrow.— Noted in September around the reservoir on top of Lookout 

 Mountain. 



54. Ammodramus savannarum bimaculatus. Western Grass- 

 hopper Sparrow. — July 25 we heard the weak song of this bird near a 

 Uttle spring on the flat south of Golden and after a short search discovered 

 the bird perched on a weed and secured it. 



55. Chondestes grammacus strigatus. Western Lark Sparrow. 

 — Fairly common in the open near Golden, but not found as frequently as 

 farther east. None were noted here after the middle of June. 



56. Zonotrichia leucophrys leucophrys. White-crowned Spar- 

 row. — An adult female taken September 19 is the only specimen of this 

 variety taken. The relative abundance of this and the following subspecies 

 can only be determined by more extended observations. Z. I. leucophrys 

 should be the first one to occur in the fall and this is true in the present case 

 while Z. I. gambeli was not found until September 26. 



57. Zonotrichia leucophrys gambeli. Gambel's Sparrow. — Com- 

 mon migrant. In the spring the first one was taken April 25, and they were 

 found up to May 9, from the plains to the top of Lookout Mountain. In 

 the fall the first one was noted September 26. They had reached the height 

 of their abundance October 10, and the last one was seen November 7. 

 They frequented the bushy thickets in the gulches and were especially 



