CONNECTICUT WARBLER. 81 



The principal differences between Sylvia MacgilUvrayi and S. PJii- 

 ladelphia may now be pointed out. The bill is considerably more com- 

 pressed in the former, which has the tarsus a twelfth of an inch longer, 

 the tail four-twelfths longer, and the wings two-twelfths shorter. Al- 

 though in both the outer four quills are longest, yet the proportions 

 are different, the first quill being longer than the fourth in S. Phila- 

 delphia, and the reverse being the case in S. Macgilli'erayi. The colours 

 are nearly the same in both ; but the latter is distinguished by its two 

 white palpebral spots, which have never been observed in the other. 

 The diflference observable between the tip of the longest primary and 

 that of the first secondary in these two species, is still more remark- 

 able in another species very closely allied to these, and of which a pair 

 of young birds have been figured in Plate CXXXVIII, and described 

 in my second volume under the name of " Connecticut Warbler, Sylvia 

 agilis,^ bestowed upon it by Wilson, who, however, never saw an adult 

 individual. 



CONNECTICUT WARBLER. 



^ Sylvia agilis, Wils. 



This species is larger and stouter than those above described, 

 and differs from them in having the wings much longer and more 

 pointed, the first quill being longest, as well as in colour, the fore neck 

 of the male being ash-grey, without lunulated markings, although 

 otherwise the colours are nearly similar. Wilson's account of it is as 

 follows : — " This is a new species, first discovered in the State of Con- 

 necticut, and twice since met with in the neighbourhood of Philadel- 

 phia. The different specimens I have shot correspond very nearly 

 in their markings ; two of these were males, and the other undeter- 

 mined, but conjectured also to be a male. It was foimd in every case 

 among low thickets, but seemed more than commonly active, not re- 

 maining for a moment in the same position. 



" Length five inches and three quarters ; extent eight inches ; whole 



VOL. V F 



