ILLUSTRATIONS OF FOREIGN OOLOGY. 
Bustard of India, we should then feel scarcely surprised at the Aus- 
tralian species being also the very same. 
The great probability, however, is, that the Indian and Austra- 
lian Bustards are distinct, however closely affined, and that this 
family has no representative in the Island of Luzon. It is even 
unknown on the eastern side of the Bay of Bengal (southward 
at least at Tippera, where Sypheotidis bengalensis occurs), though 
a solitary straggler of the Sikh (Sypheotides aurita) has been 
shot at Sandowa in Arakan, as noticed in the “ Bengal Sporting 
Magazine” for September, 1835, p. 151. ‘The Mughs had never 
seen a bird of the kind before;’’ and subsequent good observers 
in that province have never met with a second instance. 
Ag a general rule, we believe the larger species of Bustard have 
the male about a third larger than the female; e.g. Otis tarda 
of Europe, and Hupodotis edwardii or the “Great Bustard” of 
India; and these two birds (and probably the restricted congeners 
of the latter species), have a remarkable gular bag in the male sex, . 
which in Lu. edwardii (according to Mr. Jerdon), “can contain 
three quarts of water and more.” In the smaller species, known 
as Floriken; the males of which, like both sexes of the Golden 
Plovers, &¢., are distinguished by partially black plumage in the 
breeding season, we believe there is never a gular bag; and. the 
Sexes are either alike in size, as in Tetrax campestris, or the 
females are even rather larger, as in the Bengal Floriken and 
Sikh, which latter is known as the “ Floriken” in Southern India. 
We haye seen specimens of Tetrax campestris or the Kuropean 
“Little Bustard,” in which the characteristic breeding dress of the 
male was being replaced by the plainer garb of the other sex; and 
have witnessed the same change in males of the Bengal Floriken, 
which a friend long kept loose in his garden, but 14 these the 
abdomen alone remained black, when in non-breeding costume. 
Such birds have been erroneously described as young males; a 
mistake the more likely to arise, as all do not undereo their Sidnews 
at the same season. The sexual difference of plumage of the 
beets we are less agquainted with; but a good obebaver, to 
10 rr i j 
: o) a ai ine Ee that the sexes of the Indian Houbara 
The Great and Little Bustards of Europe and Western Asia are 
distinou; J : 
is ici from all others by their much stouter bill and heavier 
