

1900.] Allen, List of Birds from Santa Maria, Colombia. 175 

 340. Basileuterus cinereicollis Sclater. 



Basileuterus conspicillatus SALV. & GODM. Ibis, 1880, 117. Two females, 

 San Jose, types of the species. 



Basileuterus cinereicollis BANGS, Proc. Biol. Soc. Wash. XII, 1898, 160 and 

 180. Pueblo Viejo, San Francisco, and Palomina. 



Thirty-eight specimens : Las Nubes, Nov. 20 and Dec. 1-14 ; 

 Onaca, Nov. 28-Dec. 14 ; Valparaiso, March 8-30, April 6 and 

 17, May 21-31, June 9 ; El Libano, April 22, May 6, 12, 21, and 



3- 



This series of 38 specimens of Basileuterus cinereicollis presents 



a vast amount of variation in the color of the central crown 

 patch, which, in the Valparaiso series of 18 March specimens, 

 varies from clear yellow through yellow more or less tinged with 

 ashy at the surface to deep brownish orange ; in the greater part 

 of the specimens the crown patch is decidedly orange rather than 

 yellow, and in many of the specimens the orange is quite as in- 

 tense and pure as in B. coronatus. That this variation is not due 

 to season is evident from the period (three weeks) covered by 

 this series ; in fact, some of the specimens showing the greatest 

 difference in the color of the crown patch were collected within 

 a few days of each other. Again, the difference is not sexual, 

 as yellow-crowned and orange-crowned specimens seem to occur 

 with about equal frequency in each sex. It may be due to age, 

 young birds having a yellow crown patch and old birds an 

 orange crown patch. This is indicated by the fact that a large 

 proportion of the specimens collected in November and Decem- 

 ber have the crown yellow, or yellow more or less tinged with 

 orange. (In many specimens the tips of the crown feathers are 

 obscured by ashy, whether taken in fall or spring.) 



Basileuterus cinereicollis was described by Sclater in 1864 

 (P. Z. S., 1864, p. 166) from a single specimen from Bogota, and 

 a second specimen was received the next year from the same 

 locality (P. Z. S., 1865, p. 285, pi. ix, fig. 2). These were the 

 only specimens known to Mr. Sharpe (Cat. Bds. Brit. Mus., X, 

 382) in 1885. 



Basileuterus conspicillatus Salvin & Godman was described 

 (Ibis, 1880, 117) from two females collected at San Jose, Sierra 

 Nevada de Santa- Mar t.a, in June. These two specimens appear 

 to be the only specimens, known .to Mr, $h.arpe (/.,..); in 1885. 



