296 



BULLETIN OF THE. 



brown. below, on the throat and breast nearly white, and dull dusky-brown 

 above ; while another is deep reddish-brown below and proportionally 

 darkc above, and the others are intermediate to these. 



Between the two extremes there is more difference than usually ob- 

 tains between valid congeneric species. The series of twenty-four males, 

 on the otber' hand, are quite uniform in color, there being only a slight 

 difference in Us intensity and in the prevailing tint of the iridescence.* 



The average dimensions of the thirty-three specimens of which meas- 

 urements are given below are as follows : 



Length (males): lb.51 ; alar extent, 22.48; wing, 7.19; tail, 7.00. 

 Length (females) : ltf.95 ; alar extent, 17.94 ; wing, 5.67 ; tail, 5.11. 



The individual variation is as follows . 



Males, length, 15.50 to J6.80; alar extent, 21.10 to 23.50; wing, 6.25 to 

 8.35 ; tail, 6.25 to 7.60. 



Females, length, 12.10 to 13.40 ; alar extent, 17.25 to 18.25; wing, 5.25 

 to 5.95 ; tail, 4.75 to 5.60. 



* For a very full biography of this species, see an article by Dr. Elliott Coues in the 

 Ibis. Vol. VI, pp. 367-378, 1870. 



