BIRDS OF THE TRES MARIAS ISLANDS. 



57 



black, white, and rose-colored plumage. Their habit of carrying the 

 tail up-tilted and more or less widely spread renders them still more 

 conspicuous. It is doubtful if they ascend into the tops of trees, as 

 they are even more terrestrial tliaii their relatives the chats. 



The color pattern of this species is much like that of G. renustus, but 

 the black collar on the lower side of the neck in the males is nearly 

 obsolete, being represented only by a few black feathers, the red or 

 rose colored area on the breast and chest is paler and more restricted, 

 the postocular white stripe larger and extending across the nape as an 

 indistinct nuchal band, the bluish of the dorsal surface grayer, and the 

 white on the tail more extended. The females are browner above and 

 paler below. G, francescw is larger than G. venustus, as shown by the 

 following averages : 



Measurements of Granatelliis francescas and G. renustus. 



Wilsoiiia pusilla pileolata (Pall.). Pileolatcd Warbler. 



The only one seen was taken on Maria Cleofa May 30. It was in 

 some bushes by a little stream near the seashore and was evidently a 

 straggling migrant. 



Mimus polyglottos (Linn.). Mocking Bird. 



A few mocking birds were seen on Maria Madre, where they are prob- 

 ably resident in small numbers. They were found only on the lower 

 slopes near the sea. The two specimens secured appear to be identical 

 with others from the adjacent mainland. 



Thryothorus lawrencii (Ridgway). Maria Madre Wren. 



TliryothornsfelixGrajsou, Proc. Boston Soc. Nat. Hist. XIV, p. 278,1871 (part); 

 Lawr., Mem. Boston Soc. Nat. Hist. II, p. 268, 1874 (part). 



Thrtjotliorns felix (3 lawrencii Ridgway, Bull. Nntt. Orn. Clnb, III, p. 10, Jan., 1878. 

 The song of this wren was one of the most constant and pleasing of 

 the woodland notes heard on Maria Madre. The bird was extremely 

 abundant everywhere in the undergrowth ranging from the shore up 

 to the higher slopes. Like its near relatives, it is a restless little crea- 

 ture, constantly climbing and peering about in the thickets. The male 

 stops every now and then to utter his song and then continues insect 

 hunting. When in a musical mood he takes a position in some small 

 shrub, sometimes on its summit but ofteuer on a branch at one side, 

 and there pours out his song again and again at short intervals. Like 

 many other birds on these islands, the wren was V3ry familiar and un- 



