Birds of Celebes: Treronidae. 



599 



Diagnosis. cT. Like 0. /mllacei Salvad., (f, of Celebes, but larger, tbe bill relatively 

 larger and more robust, the hind head and naiie grey like the crown, the back and 

 scapulars a shade darker mealy maroon- purple; middle of chin and throat greyer, 

 less yellow -ochraceous (Gt.Sangi, C 12656; Siao, 12641; Tagulandang, 13501). 



Female. Like 0. tvallacei g, but larger, and with a bigger bill, the hind head generally 

 greyer, the chin and throat more tinged with grey (Gt. Sangi, C 12657; Siao, C 12G39; 

 Tagulandang, C 13502). 



Young male. Like the adult female; the back and scapulars with feathers of dark vinaceous 

 purple as in the adult male intermingled, the wing-coverts and inner quills edged 

 with yellow (Tagulandang [rj], 13500;. 



Measurements. 



Wing 



Culmen 

 (homy 

 terminal 

 portion) 



Tarsus 



a. (0 12656) ad. [cf], Gt. Sangi, 20. VH. 93 (Nat. Coll. 

 h. (Nr. 13148) ad [cf], Gt. Sangi (Meyer) .... 



c. (C 12657) ad. [2], Gt. Sangi, 20. Vn. 93 (Nat. Coll. 



d. (C 12657) ad. [g], Gt. Sangi, 24. VH. 93 (Nat. Coll. 



e. (C 12610) ad. [cf], Siao, 5. VH. 93 (Nat. Coll.) . 



f. (C 12641) ad. [cf], Siao, 29. VI. 93 (Nat. Coll.) . 



g. (C 12639) ad. [$], Siao, 2. VH. 93 (Nat. Coll.) . 



h. (Nr. 13145) ad. [Q], Siao (Meyer) .^ 



i. (TringMus.jad. [q^], Tagulandang, 4. VIII. 9 1 (Nat. Coll. 

 j. (C 13501) ad. [cj'], Tagulandang, 20. Vm. 94 (Nat. Coll. 

 k. (C 13502) ad [2], Tagulandang, 6.Vm.94 (Nat. Coll. 

 I. (C 13500) imm.[c?], Tagulandang, 2.Vin.94 (Nat. Coll. 



For further measurements: of. "W. Bias, d 1. 



Distribution. Sangi Islands: Great Sangi (Rosenb. a 5, d 1, Hoedt a 3, Platen 



Coll.); Siao (Hoedt a 3, Duivenb. a 3, Nat. Coll.); Tagulandang (Nat. 



25.5 



25.5 



24 



24.5 



24 



24.5 



24.5 



23 



24 



24.5 



25 



24 



dl, Nat. 

 Coll.), 



Extremely near as this form stands to O. tvallacei of Celebes, it is not known 

 to intergrade with it, individual variation running within narrow limits. Birds 

 from Tagulandang probably average two or three millimeters smaller than those 

 of Great Sangi, but they appear to be otherwise identical with them ; those from 

 Banka, Mantehage and Manado tua Islands are, on the other hand, about a 

 centimeter shorter in the wing and cannot be separated from O. wallacei. Truly 

 intermediate specimens we have not been able to find, the smallest Siao bird 

 (wing 155) having the bill larger than in any Celebes specimen. This species 

 seems to be absent in Talaut. 



^ 253. OSMOTRERON VERNANS (L.). 



Grey-tailed Green Dove. 



a. Columba vernans (Ij Linn., Mant. 1771, 526. 



b. Treron vernans (1) Steph., Gen. Zool. 1826, XIV, I, 274; (2) Schl., Mus. P.-B., Columbae, 



1873, 49; (3) Salvad., Cat. Ucc. Borneo 1874, 286; (4) Rosenb., Malay. Ai-cliip. 

 1878, 275; (5) Biittik., Notes Leyden Mus. 1887, 75, 95; (6) Everett, J. Str. Br. 

 E,. A. S. 1889, 196; (7) Vorderman, N. T. Ned. Ind. 1890, L, 501 ; (S) Sh. & Wlitd., 



