30 



AVIFAUNA OF LATSAN. 



Dysporus parvus, Sand Physiogr. Sail* Tidskr. 1837, p. 2.20 ; id. Ann. & Mag. Nat. Hist. xix. p. 237 (1847) ; 



Bp. Consp. ii. p. 164 (1855). 

 Pelecams plotui, Font. Descr. An. p. 278 (ed. Licht. 1844). 



Sula rffcrBlytn (nee Linn.), Cat. B. Mus. As. Soc. Bong. p. 298 (1819) ; Hard. J. f. O. 18o4 P 157 

 (Boninls); Gray, P. Z. S. 1858, p. 188 (Key Is.) ; Scl. & Salvin, Ibis 1859, * ~ ' 

 Gray, P. k S. 1800, P . 300 (Gilolo, ; Taylor. Ibis, 1801, pp. 90, 178 (Veoesuela) ; ^^1864 

 p 232 (Fiji) ; Salvin, torn. cit. pp. 381, 385; Kosenb. Reis Znidoostere.l. pp. 54, 82 83 (A, u and Key 

 I 8 ) . S Li Ucc. Borneo, p. 309 (1874) ; Beavan, Ibis, 1803, p. 495 (Bay of Bengal) , Eoseub Ee» t 

 „i GeelvinUb. p. 9 (.875) (Ternate) ; Salvad. Ann. Mus. Civ. Gen. , p. 107 (New Gnmea) , id. op. est. 

 xiv i) 669 (1879) (Key Is.) ; Bocage, Orn. Angola, p. 521 (1881). 



a *• *i. S-i A ^ " ;i " (1S,!,): A1 " 1TC,,t ' J ' ' a ls ' ;; - "■ ' M7; 



p. 852 (1804) ; Jouan,Ibis, 1865, p. 338 (New Caledonia). 

 Sula simcadvena (!), Swinb. Ibis, 1 865, p. 109. 

 Diome&a, sp. ?, Graffe, J. f. O. 1870, p. HI (Tongatabu). 

 Dy,porus leucogaster, Sundev. P. Z. 8. 1871, p. 125 (Galapagos). 



2 A o,,.™, Gray, Hand-1. iii. p. 120 (.87,,; Salvin, Trans. Zoo See. « p. 4 < .185 ; B Wj V 



P„er Ibis, 1878, p. 210 (Japan) , Scl. P. Z. 8. 1879, p. 310 (egg) ; Penrose, lbs, 1879 pp. 27o, 281 

 ,^ , Le Z, B- CeyL, P- H77 ,1880) , Sa,vad. On,. Papuasia iii. p. 42* » ^ Jj 



N-A B p 720 (1881); Seeb. IbU, 1890, p. 107 (Benin Is.) ; id. B. Japan, p. 212 (1890) id Ibis, 

 f8 9 t p.' 192 (Voieano Is.); Wiglesw. Abb. ,,. Ber. Mus. Dresd. 1890-91, p. 72 (1892, in "Ave, 



Polynesiae"). , . ., .. 1Q -, Q 



Dysporusfiier, Gnndl. J. f. O. 1874, p. 134 (Pto. Rieo) , id. op. eit. 1875, p. 402 (Cnba) ; id. op. at. 18,8, 



pp. 163, 191 (Pto. Bico). moo 

 SulaL, Ridgw. Man. N.-Am. B. p. 75 (1887) ; Cory, Ank, 1888, p. 72 (W Inches) ; Fenden 



p. 501 (Barbados) ; Hartert, Kat. Vogels. Mas. Senckenb. p. 235 (1891) (Red Sea) ; Cory, Cat. A\ . Ind. 

 B p. 81 (1892) ; id. Auk, 189.2, p. 229 (Mona I., near Pto. Rico). 



Adult. Head, entire neck, and the whole upper surface and breast dark stooty brown, lower 

 parts from the breast backwards pure white. Iris greyish brown; bill horn-grey with 

 a bluish tinge in the male, dull grey with a yellow tinge in the female; naked face and 

 gular sac bluish in male, yellow with a bluish spot before the eye in female; feet and 

 legs pale yellow. The young have the bill greyish brown, the iris brown ; feet and legs 

 flesh-coloured, assuming a yellow tinge the older they become, (From Palmer's notes.) 

 (Probably the differences in colour in the soft parts, noted by Palmer, are not peculiar to 

 the sexes but due to age.) 



Total length about 30 inches, wing 15-6 to 16'5, tail 8*5 to 9, culmen 3'75 to 4'2, tarsus 1-6 

 to 1-8, middle toe 33 to 3'5. 



Young birds are similar to the adult above, but have the lower parts also brown, the feathers 

 of the abdomen, however, having white bases and whitish edges, sometimes broader, 

 sometimes narrower. 



The nestling is covered with pure white down. 



I have received some eggs from Midway Island. They are similar to those of the other Sulce, 

 and measure 2'7G by 1-75, 2'5G by i'OS, 2 35 by 1'68, and 2 6 by 176 inches. 



