158 



41. Dendroeca pinus, (Wilson). Pine-creeping Warbler. A 

 rather rare migrant ; not seen during the breeding season. Arrives 

 about the middle of April (May 3, 1875; April 11, 1876; 16, 1877; 15, 

 1878). Usually appears upon the lawns about the middle of April, 

 associating with D. palmarnm, and seems, in its habits, quite as ter- 

 restrial. It is then (according to my observations) quite mute ; does 

 not vibrate its tail like the Yellow Red-poll; but, like that species, its 

 movements are very graceful. Later in the spring it appears in the 

 woods, among the branches, where its movements are slow and delib- 

 erate ; but, on one occasion, I saw a male darting with considerable 

 celerity, in the top of a birch-tree. I have only seen it in summer on 

 a single occasion, late in August. 



Dimensions. — Average measurements of four specimens : length, 

 5-52; stretch, 8-91; wing, 2-81; tail, 2-25; bill from nostril, -33; tar- 

 sus, -70. 



42. Siurus auric apillus, {Linne). Golden-crowned Accentor ; 

 Oven Bird. A common summer resident; breeds abundantly. Ar- 

 rives early in May (8, 1874; 10, 1875; 5, 1876; 7, 1877; April 26, 1878; 

 May 3, 1879), remaining till October (16, 1874; 16, 1876). Its eggs 

 are laid the last of May or earlj'^ in June. I found a nest containing 

 five eggs on May 30, 1877. Its habit of building a covered nest, and 

 of hovering high above the trees, just before night-fall, and pouring 

 out its delightful song as it descends through the air, serve to attract 

 more general attention and recognition than most of our shy and soli- 

 tary species do. During the day it utters a loud chant ; always monot- 

 onous, and sometimes positively disagreeable to the weary listener. 



Dimensions. — Average measurements of fourteen specimens : length, 

 6*17; stretch, 9*63; wing, 3*00; tail, 2-15; bill from nostril, -35; gape, 

 .61 ; tarsus, -91. 



43. Siurus nsevius, (Boddaert). Aquatic Accentor; Water 

 Wagtail. A somewhat common spring and fall migrant. Arrives 

 later than S. motaciUa (May 5, 1876; 15, 1877; April 26, 1878), remain- 

 ing till about the first of June (May 29, 1877; 24, 1878). Seen in 

 autumn from August 31st to September 16th (1876). The present 

 species ranges much farther to the North than S. motacilla, and rarely, 

 if ever, breeds in this latitude. Still there may be exceptional cases, 

 as there are collectors lower down the Hudson, who assert that they 

 have discovered its nest. Indeed Dr. Coues states^ that he has him- 

 self found it, at Washington, D. C, spending the summer, "under cir- 

 cumstances that leave no doubt of its breeding." 



The " Small-billed Water Thrush," as this species is familiarly 

 known, is found skulking among the weeds and debris, found on the 



*Bds. Colo. Val., Vol. I, p. 304, 1878. 



