58 Grundtvig on Warblers, of Wiscotzsin. [April 



17th they were again quite numerous, but the very next day none 

 could be found. After the i8th only a few were noticed. June 

 33 I found a nest of this species containing eggs. 



Protonotaria citrea ( Gm.) Bd. May 4th I found among a 

 flock of Warblers that were flitting about in some low bushes, a 

 handsome male of this species, now in the collection of S. W. 

 Willard, West De Pere, Wise. It arrived in company with D. 

 coronal a and D. blackbtirniae. 



Helminthophila chrysoptera {L.) Bd. Two males of 

 this species were taken May 15th and one on the i8th. The 

 next two days it appeared singly in the different flocks, but the 

 2 1 St both sexes arrived in quite large numbers, only exceeded by 

 Dendroeca striata, H. -peregrina, and D. maculosa. It appar- 

 ently nested in thickets in a low, wet place, but continued search 

 failed to reveal its nest. 



Helminthophila ruficapilla ( Wlls.) Bd. I first discovered 

 this Warbler May 3, when five were noticed in some low shrubs. 

 The 5th I found it intermingled with many of the other flocks, 

 and the 6th it rather outnumbered its bush associates, but from 

 the 6th to the 9th only a few were seen. The loth it was quite 

 numerous everywhere, and increased in number until the i3th, 

 when it was only exceeded by Setophaga rtiticiUa. After this 

 date it was rather scarce along the rivers, but still remained quite 

 numerous in the swamps, where it apparently nested, although 

 no traces of a nest could be discovered. 



Helminthophila celata {,Say) Bd. April 30 a female of 

 this species was taken on a meadow east of Wolf River, in com- 

 pany with a single D. coronata. After May i I found both sexes 

 quite common, still associating more or less with D. coronata. 

 The last one was observed May 9th. Coues, in his " Key to 

 Noi'th American Birds," describes this Warbler as " never ashy 

 about the head," and also gives the size as being the same as that 

 of H. ruficapilla. This, however, differs from my experience, 

 as many of the specimens were very ashy about the head, while 

 all of them were larger in all proportions than H. ruficapilla. 

 From a large series of specimens of both species, I have carefully 

 compiled the following measurements, giving both extremes in 

 each case. 



Length. Extent. Wing. Tail. 



'T6 



H. celata, 5— 4f 7f— 7f ^J 



H. rificapilla, 4|— 4fV 7f— ^ii 2^— 2f if- 



