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Show 171 sex. The extremes are represented by No. 57845, Tehiiantepec, Mexico, and No. 40394, Nicaragua. In the former, the middle band is less than an inch wide, while the terminal one is so abraded that only traces of it are discernible on some feathers; on the inner webs, there are three indistinct narrower bands anterior to the main one, but of these there is no trace on the outer webs. In the other specimen, the main tail-hand is over two inches wide on the intermedin, gradually narrowing to about oue inch on the lateral pair; anterior to this, there are two or three narrow, badly- defined, white bands on the inner webs, as in the Nicaragua specimen ; the terminal band is about half an inch wide. As in U. zonura, there is much difference in the amount of glaucous or chalky cast to the plumage in different individuals, but it is nearly always very conspicuous in certain lights. There is also much variation in the amount of the rusty spotting on the secondaries, this sometimes showing conspicuously on the outer webs, even in the closed wing ( as in Nos. 17785 and 54030), while again ( as in most Central American and Mexican specimens) it is almost wanting even on the inner webs. Many adult specimens have white filamentous attachments to the tips of the shafts of the tibial plumes, aud feathers of the chin, throat, and cheeks, like those observable in the type of Onychote* gruberu There are no specimens from south of Pauama now before us for comparison with uorthern ones, but examples from the Isthmus are similar to those from Mexico. List of specimens in United States National Museum. S cs o 17785 82* 15 37101 2MB sow Mil 306 » 39970 S3M0 33056 IftJM 41217 41781 4 » » wm Hue 57* 45 57 » 1 roe « m « * i C7919 can Am * 9 M . Locality. Date. Donor. 885 156 41 138 cfad. 159 9010 < f ad. irfjav. - ad. cT ad. HH ? juv.' 909 9Juv. - ad. < f - J - 9 - 763 855 543 515 349 794 709 Hnv-d* ad. - Jar. - ad. 9 - J - 963 |- ad.| 199 I- ad. tfjav. ,< f ad. < f ad. d* » d. lis Rio At rate, New Granada Punta Arenas, Costa Rica Mirador, Eastern Mexico Colima, Western Mexico Maaatlan. Western Mexico Costa Rica Oriaaba, Eastern Mexico Aoajutla, Central America Mexico Costa Rica ( San Jose) Rio de Coahuyana, Western Mexico. Nicaragua Costa Rica ( Angostura) Orisaba Mirador Mazatlan San Bias, Western Mexico July 3,1858 Feb.-', 1863' Mar. 14,1663 Mar. VI, 1863 Sept- Mar. 30,1865 Nov. -, Panama Puna Island, Guayaquil, Ecuador . Tehnantepeo, Southern Mexico... , do do Masatlan Tehnantepeo Acajntla Central America Costa Rica, ( Talamanca) . . . . . do \ Costa Rica ( Old Harbor) Tehnantepeo Costa Rica ( Talamanca) do. do. do. ,1862 Feb/* i,* i86S* Jan. 95,1869 Deo. 30,1868 May 30,1869 Aug.-, 1863 > 1873 ,1873 July 14,1874 April 3,1879 ... do., Dr. A. Schott O. Salvin. Dr. C. Sartoriua. J. Xantua. Col. A. J. Grayson. Dr. A. von Frantsins. Prof. F. Sumichraat. Capt. J. M. Dow. Yerreaux. Dr. von Frantrfua. J. Xantoa. Holland. J. CarmioL Professor Sumichraat Dr. Sartorius. Colonel Grayson. Do. Do. McLeannan. J. F. Reeve. Prof. F. Sumichraat Do. Do. Colonel Grayson. Professor Snmiohrast Captain Dow. Prof. W. M. Gabb. Do. Do. Professor Sumichraat Professor Gabb. Do. Do. Do. Do. Otter examined.- In mas. Philad. Acad., 4; Boston 8oc., 5; Am. Man., N. M; G. N. Lawrence, 3; total, 48. |