ILLUSTRATIONS OP FOREIGxV OOLOGY. 
in M yag t° f M ,° n- Du P err °y> fbmid ‘he P rubricauda 
prelitot ^°tl ?■’ g UP ° n the peaks of the most 
precipitous of the mountains. 
In the voyage of Mon. Freycinet, P mthereus in the Isle of 
iWeeM!l * . t0 r °° St Upon trees > and make their nests among 
naccess.b e rocks : and Captain Tuckey states, “ That the great 
trop.c bird P. a&hereus, breeds in the crevices of the elevated rocks 
near the shores. 
In colour and markings, the eggs of all are nearly similar, the 
me and form only shghtly. varying, but they are very peculiar 
ne.ther agree.ng in the olive tints and large blotching of those of 
the Gulls and Terns, to which on the one side they arc allied, nor 
to the generally uniform and light colour of the Peliccmidce, which 
seem to approach them by Sula. They remind us more of the 
eggs of some of the true Falcons, both in form and colouring, and 
are at variance, in these respects, with those of all the Natatores 
we are acquainted with. 
For specimens of Phaeton asthereus with its eggs, Fig. 1 of 
our Plate, we are indebted to our old correspondent, Mr. Kirk 
of Tobago. He states in his notes — 
“ This species frequents the island of little Tobago, St. Giles, 
aud Smith’s Islands, which are all dependencies of Tobago, and 
situate at no great distance from our coast. They build in holes 
of the rocky precipices overhanging the raging sea, and are gene- 
rally both difficult and dangerous to approach. They lay one egg 
of a dark sombre colour, and during the time of incubation, the 
female will allow herself to he taken off the nest rather than take 
wing ; but she will at the same time defend herself, by a diligent 
use of her bill, with which she draws blood freely.” 
Specimens of P. flavirostris, Brandt, together with an egg, 
Fig. 2, were sent to us from Bermuda, by Lieut. Wedderburn. 
This species is migratory in Bermuda, arriving there to breed, and 
leaving again when the duties of incubation have been performed. 
Mr. Tristram has given the following dates of the arrival and 
departure of P. flavirostris] observed by himself when resident in 
the Bermudas, and has also obliged us by extracts from his notes 
regarding the habits and incubation of these curious birds, which 
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