392 
Dr. E. Coues on Central- American Laridrn, 
( S . panaya, , Lath.), by the majority of modern ornithologists, 
and generally called Haliplana or Onychoprion panaya . But, 
for my part, I can see nothing in the diagnoses either of Graelin 
or Latham by which they can be supposed to refer to the 
species in question. I consider Gmelin's name as referring, in 
all probability, to the S. fuliginosa from the Pacific Ocean, de¬ 
scribed by Forster as S. guttata , and again by the same author 
as S. serrata, and by Bloxham (Voy. Blonde) as S. oahaensis. This 
“ S. fuliginosa ex Pacifica ” has been by some authors considered 
as distinct from the common NorthAmeriean S. fuliginosa ; but on 
examining a large series collected by the United States Exploring 
Expedition, I find them to be quite identical. Other specimens 
from Australia are also specifically the same. Therefore I consider 
that the name panayensis or panaya, G in., Lath., is synonymous 
with fuliginosa, Gm. If such be the case, then the well-known 
species now under consideration has yet to receive a tenable 
specific appellation*. A third species of Haliplana , besides S. 
fuliginosa and the present one, is the Haliplana lunata , mihi, ex 
Sterna lunata , Peale, Ornith. of the U. S. Exploring Expedition. 
This is a typical component of the genus Haliplana , and is very 
closely allied to the species under consideration, the general dis¬ 
tribution of the colours being entirely similar. It is, however, a 
perfectly valid and distinct species, differing somewhat in size, and 
very decidedly in the shade of the upper parts, as well as in some 
minor points of coloration. These three species are all that 
compose the genus Haliplana , as far as my knowledge extends. 
a . “Lighthouse Reef,” British Honduras, 10th May, 1862; 
and other specimens. 
14. Haliplana fuliginosa, Gm. : Coues, Pr. Ac. Nat. Sc. 
Philad. 1863, p. 556. 
One specimen only, from Curlew Cay. Agrees with specimens 
of the well-known species.—O. S. 
15. Anous stolidus, Linn.: Coues, Proc. Ac. Nat. Sci. 
Philad. 1862, p. 557. 
Numerous specimens from Glover's Reef I have seen, but did 
* See my forthcoming “ Monograph of the Laridcs ” (where the species 
is named H. discolor) for further elucidation of this point. 
