SEXUAL SELECTION 



501 



tween the cases is that in the one the result is due to man's 

 selection, while in the other, as with humming-birds, birds 



Fio. 48. — Lophomis omatus, male and female (from Brehm)* 



of paradise, etc., it is due to the selection by the females of 

 the more beautiful males. 



I will mention only one other bird, remarkable from the 

 extreme contrast in color between the sexes, namely, the fa- 

 mous bell-bird (jOhaamorhynchus niveus) of South America, 

 Descent — Tol. n. — i 



