THE SEX OF HYBRID BIRDS. 195 



Faisan dore 2 X Faisan commun 3 <$ 1842 P. 



Faisan a collier 4 X Faisan argente 5 1886 P. 



Faisan commun 3 X Faisan amherst 6 1837 P. 



Faisan dore 2 X Faisan ordinaire 3 = $ 1853 P. 



Faisan commun 3 X Faisan argente 5 = <$ 1837 P. 



Faisan commun 3 X Faisan argente 5 = J 1 1843 P. 



Phasianus mongolicits X Phasianus colchicns = <$ 1906 B. 



Phasianus colchicus X Phasianus reevesi - $ 19043. 



Phasianus colchicus X Phasianus torqnatus = <3 18946. 



Phasianus colchicus X Phasianus reevesi = <$ 18946. 



Chrysolophus amherst ice X Chrysolophus pictits $ B. 



Phasianus colchicus X Phasianus reevesi <$ 18976. 



34 Chrysolophus amherstia: X /4 Chrysolophus pictus = <$ 18876. 



Euplocamus 1 su'inhoii X Euplocamus nycthemcrus = <$ 1882 P. 



Euplocamus sivinhoii X Euplocamus nycthcincnis = $ 1875 P. 



Euplocamus lineatus X Euplocamus nycthemcrus = ^ 1887 P. 



Euplocamus lineatus X Euplocamus nycthemerus = $ 1878 P. 



Euplocamus horsfieldi X Euplocamus lineatus = c? 1819 P. 



Euplocamus horsfieldi X Euplocamus lineatus c? 1869 P. 



Faisan amherst 6 X Faisan dore 2 1882 P. 



Faisan amherst X Faisan dore 1902 P. 



Faisan commun 3 X Faisan a collier 4 1860 P. 



Faisan commun X Faisan a collier = g 1858 P. 



Faisan commun X Faisan a collier = < 1843 P. 



Of a total of thirty-seven hybrid pheasants, nineteen have been 

 from parents sufficiently widely separated to be ranked by syste- 

 matists as separate genera or subgenera, and of these nineteen, 

 fifteen were of known sex, namely, fourteen males and one 

 female. Of the remaining eighteen there were twelve males, three 

 females and three of which the sex was undetermined. 



Thus of a grand total of sixty-one hybrids, the sex is known 

 in fifty-one cases and among these there are only four females in 

 all. Furthermore, three of these females were hybrids between 

 species of the same genus, the other one, between species from 

 genera not widely divergent. In hybrids between individuals of 

 distantly related genera or between individuals from different 

 subfamilies (e. g., guinea )( chicken) where the sex has been 

 recorded it has been invariably male. 



There are three possible sources of error in these data. In the 



3 Presumably P. colchicus. 



4 Presumably P. torquatus. 



5 Presumably G. nycthemerus. 



6 Presumably C. amherstice. 



