Myrtle-Warbler 451 



to the nest, so as to cover up and prevent the incubation 

 of the intruding egg. 



Black-throated Blue Warbler. Dendroica ccerulescens. 



A.O.U. Checklist no 654 — Colorado Records — Cooke 94, p. 183 

 (error); 97, p. 114; 04, p. 57 ; H. G. Smith 9G, p. 76; OS, p. 190; 

 Chapman 07, p. 133. 



Description. — Male — Above slaty-blue, the middle of the back some- 

 times a little speckled with black ; wings black, extensively edged with 

 blue, a conspicuous white patch towards the base of the pruiiaries, 

 except the outermost ; the primaries also extensively white on the 

 inner web ; tail dusky, edged with blue, the outermost feathers with 

 a large subterminal patch on the inner web ; below, throat, sides of 

 the head and flanks black ; rest of the under-parts white ; iris brown, 

 bill black, legs dusky horn. Length 4-50 ; wing 2-60 ; tail 1-90 ; culmen 

 •40 ; tarsus -65. 



The autumn and winter male is very similar, but has a brown bill 

 and a buffy tinge on the white of the flanks. The young male has 

 a slight greenish wash over the blue of the upper-parts and a slight 

 white freckling on the black of the throat and flanks. The female 

 is olive-green above, rather more bluish on the crown and tail ; an in- 

 complete whitish ring round the eye and a white patch at the base of the 

 primaries ; below pale yellow. Size about the same as the male. 



Distribution. — Eastern North America, breeding from Hudson Bay 

 and Newfoundland south to the mountains of Pennsylvania ; on 

 migration south, chiefly east of the Mississippi to southern Florida 

 and the Antilles. 



The Black-throated Blue Warbler is a rare straggler as far west as 

 Colorado. It has only been twice met with, on both occasions by 

 H. G. Smith. He obtained a female on the Platte River near 

 Denver, May 24th, 1888, and very plainly observed, but did not obtain, 

 a male at Wray on September 18th, 1903. 



Myrtle- War bier. Dendroica coronata. 



A.O.U. Checklist no 655— Colorado Records— Aiken 72, p. 196 ; 

 Ridgway 73, p. 176 ; Trippe 74, p. 232 ; Henshaw 75, p. 193 ; Allen & 

 Brewster 83, p. 158 ; Cooke 97, pp. 19, 114 ; 04, p. 61 ; Henderson 03, 

 p. 108 ; 09, p. 239 ; Chapman 07, p. 141 ; H. G. Smith 08, p. 190. 



Description. — Male — Above slaty-blue, streaked with black ; patch 

 on the crown, rump, and a patch on either side of the breast, bright 

 yellow, the rump-patch palest ; wings and tail dasky, with greyish 

 edgings, the coverts broadly tipped and edged with white, foi-ming 

 a double wing-bar ; the three outer pair of tail-feathers with a large 

 subterminal white spot on the inner web ; sides of the head black, with 



FF 2 



