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Show 576 DR. O. FINSCH ON THE BIRDS OF TRINIDAD. [Julie 23, 61. LEISTES GUIANENSIS(L.); Scl. Cat.p. 138; Taylor, I.e. p.84. Leistes americanus, Loot. p. 279. Two specimens, not different from others from Guiana. 62. LEISTES ICTEROCEPHALUS (L.). Chrysomus icterocephalus, Leot. p. 281. Xanthosomus icterocephalus, Scl. Cat. p. 136 ; Taylor, I. c. p. Leistes icterocephalus, Cass. Proc. Phil. 1866, p. 14. An old bird, similar to specimens from New Granada. 63. MOLOTHRUS ATRONITENS, Cab. in Schomb. Guian. iii. p. 682. Molothrus bonariensis, Leot. (nee Gmel.) p. 277. Molothrus sericeus (part.), Scl. Cat. p. 135. 31olothrus atronitens, Pelz. Orn. Bras. iii. p. 200. Two specimens. Old; black, the entire upper and under parts of head and body having a dark purplish-violet lustre, except the middle of the vent and under tail-coverts, which show a dark metallic-green lustre, like the wings and tail and the coverts of the primaries and secondaries; bill and feet black. A specimen in the Bremen Collection from Brazil agrees in every respect. (ad., atronitens, Cab., Trinidad.) (ad., atronitens, Cab., Trinidad.) (ad., atronitens, Cab., Brazil.) (ap. Cabanis.) (bonariensis, Gmel., Brazil.) ( o*, cassini, New Granada.) (cS, cassini, New Granada.) ( S, cassini, New Granada.) ( S, aeneus, Wagl, New Granada.) The description given by Dr. Cabanis, " like bonariensis, but smaller," and the measurements given by him, are undoubtedly referable to this species. The purple-violet lustre on the head and body is quite the same as in 31. bonariensis; but this latter species does not show the metallic-green shade on the wings and tail so bright, and wants the green lustre on the vent and under tail-coverts. It may possibly be that Vieillot's Passerina discolor is this species; but the description not being accompanied by measurements, it is impossible to refer it with certainty to any of the known species of this extremely difficult group. Mr. Cassin, therefore, is certainly wrong in characterizing 31. discolor (= atronitens) as " rather larger than 31. bonariensis (al. 4|-4^")," the true 31. atronitens being, on the contrary, much smaller. The bird which Mr. Cassin (Proc. Ac. Phil. 1866, p. 20) describes as M. discolor, from Trinidad and Cuba, we possess in the Bremen collection from New Long. al. 3" 9'" 3 8 3 7 3 9 4 3 4 11 4 10 4 6 4 4 (rect , med.) caud. 2" 2 2 2 2 3 3 3 o O mitt 6h 6 8 11 10 8 2 1 rostr. 7 I'" '2 8 7 - 7-1 8»a* 8| H 8* altit, ad bas. 3f" 4 3^ 4 H H 4£ 44 tars. 11"' 101 10| 11 121 13 13 13 13 |
