440 ICTERIDZ. 
1. Ostinops decumanus. 
Xanthornus decumanus, Pall. Spic. Zool. fase. vi. p. 1, t. 1’. 
Ostinops decumanus, Salv. & Godm. Ibis, 1879, p. 200°; Sel. & Salv. P. Z. 8. 1879, p. 508 °; Sel. 
Ibis, 1883, p. 1514; Scl. Cat. B. Brit. Mus. xi. p. 315°; Tacz. Orn. Per. ii. p. 404°; Salv. 
Ibis, 1885, p. 2177. 
Cassicus citreus, Miiller, Syst. Nat. Suppl. p. 87; Cass. Pr. Ac. Phil. 1866, p. 68°. 
Oriolus cristatus, Bodd. Tabl. Pl. Enl. p. 21”. 
Ostinops cristatus, Scl. P. Z. S. 1858, p. 455*°; Cass. Pr. Ac. Phil. 1860, p. 188"; Lawr. Ann. 
Lyc. N.Y. vii. p. 297"; Salv. P. Z. S. 1870, p. 190; Pelz. Orn. Bras. p. 191; Wyatt, 
Ibis, 1871, p. 828”. 
Niger, dorso postico, uropygio et crisso castaneis ; cauda flava, rectricibus duabus mediis nigricantibus ; rostro 
eburneo, pedibus nigris. Long. tota 17, ale 8-8, caude 7°5 (rectr. med. 7:0), rostri a rictu 2°3, tarsi 2-0. 
@ mari similis sed minor. Long. tota 13-5, ale 6-8, caude 6-4 (rectr. med. 6°2), rostri a rictu 19, tarsi 1-7. 
(Descr. maris et feminze ex Bugaba, Panama. Mus. nostr.) 
Hab. Panama, Bugaba (Arcé}*), Lion Hill (M/*Leannan'*), Chepo (Arcé*), Turbo 
(Wood 1),—Sourn America, from Colombia 2? 15 to Bolivia and South-east Brazil ° ; 
Guiana’. 
This species is best known under Gmelin’s title cristatus, but there can be no doubt 
that Pallas described and figured it under the name of Xanthornus decumanus in the 
sixth part of his ‘Spicilegia Zoologica,’ published in 1769, nineteen years before 
Gmelin’s name appeared; decumanus also antedates Boddaert’s cristatus (1783) and 
Miiller’s citreus (1776). 
Ostinops decumanus was observed by Mr. C. J. Wood both at Turbo and on the 
banks of the Atrato!; and we have received specimens from Chepo, the line of the 
Panama Railway, and from as far north as Bugaba, in the Province of Chiriqui, so 
that there can be no doubt that the species belongs to our fauna, occupying, as it does, 
the whole of the State of Panama. But it does not proceed further into the isthmus, 
its name being absent from all the Costa-Rica lists. 
Mr. Wyatt found Ostinops decumanus not uncommon in the lower mountain-districts 
on the east side of the valley of the Magdalena in Colombia. He found them nesting 
during the whole of his three months’ stay in the country. They breed in colonies, 
making long pendulous nests. A large colony he observed had established themselves 
in a leafless tree, in a valley near San Nicolas, in March. Every evening, just before 
sunset, they held a most discordant concert, flying over the valley, wheeling round, and 
then diving down to the bottom of their bag-shaped nests, some of which were so 
loosely woven that he could see the bird, when in, struggling to get down to the bottom. 
The iris, he adds, is bright sky-blue 1. 
Eggs obtained by Salmon? at Remedios, on the opposite side of the valley, are 
described as pale greenish blue, sparsely spotted with dark brown spots. 
