1887.] PROCEEDINGS OF UNITED STATES NATIONxVL MUSEUM. 417 



1840. — Spkenocercus Gray, List Geu. Birds, ii. — (samo type). 



1841. — Bomeris Hodgsox {fide Gray). 



1854. — Phalacrotreron Bonaparte, Consp. Av., ii, p. G (type C. calva Temm.). 



1854. — Buircron Boxapaute, Consp. Av., ii, p. 9 (type, C. capellU Temm.). 



18bi.—Osmotrero)i Boxapaute, Coasp. Av., ii, p. 12 (type, C. vernans Gm.). 



Tlie (liiferent sections of Green Pigeons seem to grade into each other 

 in such a manner as to make it impossible to regard them as generic 

 divisions, except Crocoims Bonap., which is a fairl}- well-marked genus, 

 characterized by the very pointed primaries, a square tail, and a very 

 strong and short bill, with a prominent gonydeal angle, besides se%^eral 

 I^eculiarities of coloration. 



The absence or presence of the peculiar notch in the inner web of the 

 third primary (see pi. xxii, fig. 2) seems to be of little value as a generic 

 character. It is well pronounced in adult T. sieboldU, but two young 

 birds before me show only the faintest possible indication of such a notch- 

 In regard to the differences between the two species occurring in Ja- 

 pan, I have nothing to offer additional to what I said in my first paper 

 on the Liu Kiu birds (Proc. U. S. Nat. Mus., 18SG, p. 639) where they 

 are distinguished as follows : 



a'. Lower breast and entire abdomen yellowish-white; the outer tail-feathers above 



with a subterminal black band T. sieboldii. 



fl2. The yellowish white of the body confined to the middle portion of the lower ab- 

 domen and the crissum ; the tail-feathers without any subtermiual cross- 



^^lifl T. x}ermagna. 



Mr. Seebohm (Ibis, 1887, p. 179) gives T. sieboldii as occuniug in Li;i 

 Kiu. There is nothing improbable in this, although, if a resident there, 

 it may possibly be Swinhoe's T. sororins, which occurs in Formosa, 

 rather than the true T. deholdii. I am bound to say, however, that I 

 find nothing in Swiuhoe's description to distinguish it from the latter, 

 and Schlegel gives it as a synonym of T. sieboldii on the strength of a 

 female specimen in the Leiden Museum received from Mr, Swiuhoe 

 himself. Untd the question has been definitely settled I shall include 

 it in the following synonymy with a query. 



(IGl). Treron sieboldii (Temm.). 



Siebold's Green Pigeon. Awo-bato. 



18'3o.—Colnmha sieboldii Temmivck, PI. Color., iv, livr. 9.5, pi. 549.— Blakist., Ibis, 

 1662, p. 329.— C. ( Vinago) s. Temm. & Schl., Fauna Jap., Aves, p. 102, pi, 

 GO D (1847).— Tra-oM s. Gray, Gen. B., ii, p. 4G7 ( 1844).— Schlegel, Mus. 

 P. Bas, Columb., p. Gl (1^573).— v. Maktexs, Prenss. Exp. Ost-As., Zool. 

 Th., I, p. 370 (187G).— Blakist. & Pkyer, Ibis, 1878, p. 227.— lid., Tr. 

 As. Soc. Jap., VIII, 1880, p. 2m.— lid., iUd., x, 1882, p. 129.— Blakist., 

 Chrysanth., 1882, p. 522.— /c/., ibid., 1833, p. 28.— Id., ibid., Feb., 1883, 

 P- —.—Id., Amend. List B. Jap., p. 44 (1884).— JouY, Proc. U. S. Nat. 

 Mus., VI, 1883, p. 314.— ? Seebohm, Ibis, 1837, p. 179.— ? Stejxeger, 

 Proc. U. S. Nat. Mus., ix, p. 639 ( 1887).— id!., Zeitsch. Ges. Orn., 1887, p. — , 

 — Vinago s. Whitely, Ibis, 1867, p. 204.— Swivhoe, Ibis, 1875, p. 452. 



1SQ6.—? Spkenocercus formosw Swixhoe, Ibis, 1866, p. 122 (nee 18*3 !) 



1866. — ? Splienooerciis sororius Swixhoe, Ibis, 1866, p. 311. 



1870.—.? Treron sonoriiis Gray, Hand-1. B., ii, p. 224 {lajjsu !). 



PKOC. N. M. 87 27 



