320 
Mr. O. Salving Visit to the 
the South from the North American and West-Indian species, 
S. antillarum, with absolute certainty. However, the majo¬ 
rity of individuals, by far, from the southern continent have 
a uniformly yellow bill, which is stouter and stronger than 
that of northern birds. 
Larus poliocephalus, Max. 
Is the same as VieilloPs L. cirrhocephalus , as acknowledged 
by Max. (Beitr. iv. p. 854), and by the original label on the 
specimen in the New York Museum. 
Museum of the Academy of Natural Sciences of Philadelphia. 
Unfortunately I had so little time at my disposal at Phila¬ 
delphia that I could only give a glance at this grand collection. 
At present the shelves are densely crowded with specimens, 
and in somewhat confused arrangement. This defect will 
doubtless be remedied when the Academy moves into the new 
building now in course of construction for its reception, where 
the birds will, it is to be hoped, be exhibited as they deserve. 
Mr. Ogden kindly showed me through the galleries. The 
following are a few of the notes I made :— 
When examining the specimens of Ballidse in the Paris 
Museum, at the time we were working up our monograph 
of that family (P. Z. 8. 1868, p. 442 et seq .), Mr. Sclater, 
Mr. J. Yerreaux, and I looked everywhere in vain for the birds 
named but not described by Prince Bonaparte as Micopygia 
verreauxi and M. sclateri in his paper on the Ballidse (C. B. 
xliii. p. 599, 1856). These specimens I found in the Mu¬ 
seum of the Academy of Natural Sciences of Philadelphia. 
M. verreauxi is labelled “ Ortygometra verreauxi , Bp.: type, 
Perouthe other, “ Ortygometra sclateri , Bp.: type, PerouP 
In both cases the specific names and the author’s are in Bona- 
parte^s handwriting, the rest in that of Jules Verreaux. The 
former bird has since been named Porzana castaneiceps, Scl. 
& Salv. P. Z. S. 1868, p. 453, Ex. Orn. t. 78; the latter, P. 
hauxwelli, Scl. & Salv. P. Z. S. 1868, p. 453, Ex. Orn. t. 52. 
Both these latter names will have to stand, Bonaparte’s allusion 
to them as Micropygia verreauxi (major) and M. sclateri 
