NORTHWESTERN MEXICO. 269 



Fam. Sylvicolid-S}. 



20. Seiurus auricapillus (Linn.). 

 Mazatlan, Grayson. 



" I have met with this species only during the winter months, from November to April. It inhabits the 

 thickest woods, and is very shy and solitary, as well as silent." 



21. Seiurus ludovicianus (And.). 

 Mazatlan, Grayson ; Colima, Xantus. 



" This little bird is usually found about stagnant pools, or solitary brooks. It appears to me to be the same 

 species which I years ago noticed about the swamps and river side in Louisiana. It is not common in this 

 locality." 



22. Mniotilta varia (liinn.). 

 Mazatlan, Grayson ; Colima, Xantus. 



"I found this bird in the Sierra Madras in December, and also in the Coast Range in January and April. 

 Not common. Its habits are much like the Nuthatches — inhabiting the older woods." 



23. Parula insularis Lawr. 



« " Proc. Bost. Soc. ofN. H., xiT., pp. 278, 300. 



Island of Socorro, Tres Marias, Grayson. 



" Abundant upon the Tres Marias Islands, and a constant resident ; also upon the Island of Socorro, two 

 himdred and fifty miles west-south-west of the Tres Marias. I have never met with it upon the main-land. 



« It is remarkable that this bird should be found upon the widely separated islands above stated, and not 

 upon the main-land adjacent to the Marias." 



24. Oeothlypis trichas (linn.). 

 Mazatlan, Topic, Grayson. 



"A common species from October until the latter part of June. They migrate to the high central plains to 

 breed. I have seen it in the month of July in the vicinity of Tepic." 



25. Geothlypis poliocephala Baird. 

 Mazatlan, Grayson. 



26. Geothlypis Philadelphia, var. macgilivrayi (And.). 

 Mazatlan, Grayson. 



« I have met with this species in October, December, April and September, but have not seen it during the 

 summer months." 



27. Dendrceca auduhoni (Towns.). 



Tepic, Grayson ; Mazatlan, Bischoff ; Tonila, Jalisco, Xantus. 



« Common, and widely distributed in the winter months; arrives in December and departs in April." 



28. Dendrmca cestiva (Gm.). 

 Mazatlan, Grayson ; Colima, Xantus. 



MEMOIKS BOST. SOO. NAT. HIST. VOL. n. 68 



