88 SIXTEENTH REPORT. 



60. Vireosylva olivacea. Red-eyed Vireo. — This species was one of the 

 very abundant ones. It occurred in the hardwood forest, along the river, in 

 the thickets, in the birch and aspen growth, and rarely in the burn. The 

 first nest was found on July 10 on a partly burned hillside that sloped to 

 Brown Lake. When found it contained two eggs, two days later there was 

 one more, and by the following day a cowbird had left an egg in it. This 

 nest was constructed almost entirely of strips of birch bark. On July 27 a 

 young bird just able to fly was found near camp. 



61. Lanivireo solitarius solitarius. Blue-headed Vireo. — An adult female, 

 taken on July 28, in the burn near the forest, furnished the only record for 

 the species. 



62. Mniotilta varia. Black and White Warbler. — This warbler was first 

 noted on July 5, when two birds were seen at the edge of a backwater along 

 the river. Three more birds were recorded in July in the hemlocks of the 

 hardwood forest. In August the species became more plentiful, and small 

 flocks, mainly of young birds, were seen frequently. They always exhibited 

 a preference for the hemlocks, but were not rarely noted in the river thickets. 

 By August 11 the species had practically disappeared. 



63. Vermivora rubricapilla rubricapilla. Nashville Warbler. — The Nash- 

 ville warbler was noted first on July 14, when a male was observed in full 

 song at the edge of a spruce and tamarack swamp. He was perched in 

 the very top of a dead tamarack, and from his actions had a nest in the 

 immediate vicinity. On July 19 another male was seen in a poplar growth 

 near the river. In August the species was occasionally seen along the edge 

 of the hardwood forest, but on the whole it was much more typical of the 

 ash and alder thickets along the river. Small flocks composed exclusively of 

 this species were seen on August 7 and 11. 



64. Compsothlypis americana usneae. Northern Parula Warbler. — A single 

 bird of this species was collected on August 1 1 from a flock of several species 

 of warblers in a thicket along the river. It was the only one seen. 



65. Dendroica caerulescens caerulescens. Black-throated Blue Warbler. — 

 A male black-throated blue warbler was taken in the hemlock forest on 

 July 12. On the seventeenth a female was seen in the same place. Small 

 flocks were recorded on August 11 in the thickets along the river, and on 

 the fourteenth the last bird of the species was seen in a similar habitat. 



66. Dendroica coronata. Myrtle Warbler. — An adult male myrtle war- 

 bler was taken on July 19 in a spruce and tamarack swamp. No others 

 were seen. 



67. Dendroica magnolia. Magnolia Warbler. — The first of this species 

 recorded was an adult male in the hemlock forest on July 31. On 

 August 5 two birds were seen in the brush along the Foster City trail, and 

 on the fourteenth, another male was noted. Small flocks of from ten to 

 twenty of these birds were seen on August 17. 



68. Dendroica pensylvanica. Chestnut-sided Warbler. — This warljler was 

 frequently heard singing in July, and was commonly seen in August. Thick- 

 ets near running water were its favorite haunts, and as the Foster City trail 

 afforded many such, the species was noted there very commonly. It was 

 rare in the forc^st and in the unburned swam]os. 



69. Dendroica fusca. Blackburnian Warljler. — This species was first re- 

 corded on July 17, when a small flock of eight males in the most l^rilliant 

 breeding plumage were observed feeding in the hemlocks. On July 28 

 another small flock of duller colored birds was seen on the Foster Cit}' trail, 

 and others or the same flock were observed here on several subsequent 



