104 THE NATURALIST'S GUIDE. 



hler. Very abundant spring and autumn migrant. I have 

 taken it in spring from May 15th until June 9th; in au- 

 tumn, from September 19th until the latter part of Oc- 

 tober, — during this season it is very numerous. I think 

 the Sijlvla autumnalis, Wils., is really the young of this 

 species. I have stiot hundreds of this species in autumn, 

 but have never taken one of the other [D. castaiiea). 



42. Dendroeca aestiva, Baird. — Summer Yelloiv- 

 Birxl. The most common of the Dendroeca in summer ; 

 breeds abundantly. Arrives from April 30th to May 8th ; 

 departs early in September. 



43. Dendroeca maculosa, Baird. — Blade and Yellow 

 Warbler. llather rare migrant, although common during 

 the spring of 18G7. Arrives the third week in May; have 

 taken it from the 23d to the 27th ; have never met with it 

 in autumn. Frequents the woods everywhere. 



44. Dendroeca palmarum, Baird. — Red-Poll War- 

 bler, " Palm Warbler." Abundant during the migrations. 

 I have taken it from April 9th to May 10th. In autumn it 

 arrives from the north about the middle of September, and 

 occupies about two weeks in passing. The most terres- 

 trial of all the Dendroeca. Found everywhere. 



45. Dendroeca discolor, Baird. — Prairie WarUer. 

 Rather common summer resident. Arrives from May 13th 

 to 19th. Frequents the high sandy fields grown up to 

 bushes, or rocky hillside covered with barberry bushes, 

 where it breeds. Has a most peculiar song, which is al- 

 most indescribable. 



I have never met with the Blue Warbler {Dendroeca 

 ccerulea, Baird) although it perhaps rarely occurs. 



46. Perissoglossa tigrina, Baird. — Cajje May War- 

 Uer. Exceedingly rare spriug and autumn migrant. I 

 have never met with it. Mr. W. Brewster has taken it 

 in an apple-tree on May 17, 1867. The late Dr. Hemy 

 Bryant once showed me quite a number of skins, which he 



