Nov. 1907. BIRDS FROM GUATEMALA DEARBORN. 129 



264. Dendroica virens (Gmelin). 



One was taken near El Rancho (Jan. 6th), one at Lake Amatitlan 

 (Feb. 27th), and two at Lake Atitlan (April loth). Few were seen, 

 none below 2,000 feet. One of the April specimens had just begun to 

 moult about the base of the bill and the auriculars. 



265. Oporornis formosa (Wilson). 



Two were secured at Los Amates (Jan. 22d and Feb. gtti) and 

 one at Mazatenango (Mar. 



266. Oporornis tolmiei (Townsend). 



One was taken at Lake Amatitlan (Feb. 26th), two at Patulul 

 (Mar. 26th) and two at Lake Atitlan (Apr. loth), It is probable, 

 judging from these dates of occurrence, that at least the Lake Ama- 

 titlan specimen was passing the winter at Guatemala. The others 

 may have been passing migrants. One of the April specimens had 

 pinfeathers on gular, frontal and auricular areas. 



267. Seiurus aurocapillus (Linnaeus}. 



One was collected at Mazatenango March 2ist. 



268. Seiurus noveboracensis notabilis Ridgway. 



One, taken at Los Amates (Jan. i6th) and another at Lake 

 Amatitlan (Feb. 27th) belong to the intermediates between 5. n. 

 noveboracensis and 5. n. notabilis, such as occur spring and fall in 

 Chicago, and which are referred to the latter form on account of their 

 color, notwithstanding they are somewhat smaller than typical 

 notabilis. This species (subspecies uncertain) was also seen at 

 Puerto Barrios moving about among a pile of mahogany logs on the 

 shore. At Los Amates, they were frequently seen near the river. 

 Both of the specimens collected were undergoing a gradual moult 

 on the head. Iris dark brown. 



269. Geothlypis trichas brachydactyla Swainson. 



Eleven specimens were collected, time and place as follows: 

 Los Amates (Jan.), Lake Amatitlan (Feb.), Mazatenango and San 

 Jose (March), Lake Atitlan (Apr. 7th). An immature male, taken 

 January i6th, was in autumnal plumage. Another, taken February 

 ist, had begun to assume the black mask. An adult male, taken 

 April 7th, was moulting on chin and crown. This yellow-throat is 

 a common winter resident in moist, reedy places, up to 5,000 feet and 

 perhaps higher. 



