472 



Other speclmms examined. 



Mas. Pliilad. AcaiT.., 2; New York, 2, Boston Soc, 3; G. N. Lawrjnce, 3; R. Ridg- 

 way, 1 — total, 29. 



IBYCTER (DAPTRIUS) ATER. 



Band-tailed Ibycter. 



I>ai)trhis (Iter Vieill. Aualy. 1816, 22; Nouv. Diet, xvi, 1819, 387 ; Gal. Ora. 1825, pi. 5.— 

 ViG. Zool. Journ. i, 1824, 319, 336.— Steph. Zool. xiii, pt. 2, pi. 32.— Less.-Tf. 

 Orn. 1831, 32.— Gray, Gen. 1840, 2; ed. 2, 1841, 2; fol. ed. 1844, sp. 2.— Kaup, 

 Ueb. Falk. Mus. Senck. 1845, 262.— Caban. Schomb. Reis. Guian. iii, 1848, 742. 

 Ibycter ater SwAixs. Class, i, 1837, 308 ; ii, 209.— R. Schomb. Verz. Fauna Br. Guian. 

 1840, 742.— Gray, Gen. 1844, i, 9, pi. 5, f . 1 ; List B. B. Mus. 1848, 29 ; Hand List, 

 i, 1839, 5.— Bonap. Consp. i, 1850, 12.— Strickl. Orn. Syn. i, 1855, 23,— Pelz. 

 Verb. z.-b. Ges. Wien, 1862, 135; Orn. Bras. 1871, 2, 392.— Schl. Mus. P.-B. 

 Polybori, 1862. 7.— Gurney. Cat. Rapt. Norw. Mus. 1864, 29 ; Ibis, Jan. 1875 (de- 

 scription of young).— ScL. & Salv. Nom. Neotr. 1873, 122.— Shaepe, Cat. Ace. 

 B. M. 1874, 35. 

 Ibycter (Baptrhis) ater Ridgw. Pr. Boston Soc. May, 1873, 11. 

 Falco aterrimus Temm. PL Col. i, 1823, pis. 37 (adult) and 342 {young). 

 Gymnops aterrimus Spix, Av. Bras, i, 1824, 11. 

 Cir cactus aterrimus Cut. Reg. An. i, 1828, 328. • 

 Baptrius aterrimus Less. Man. Orn. i, 1828, 75.' 

 Milvago aterrimus BuRM. Tb. Bras, ii, 1856, 39. 

 Baptrius striatns Dumont, Diet. Sc. Art. Carafara,— ?— Yieill. Nouv. -Diet. H. N. 



xvi, 387 ijuv.). 

 f Gymnops fasciatus Spix, Av. Bras, i, 1824, 10, pi. 4 (young). 

 Circaetus fasciatus Cuv. Reg. An. i, 1828, 338. 

 Fandion fasciatus Gray, in Griff, ed. Cuv. Birds i, 1829, 41. 

 Caracara fasciata Less. Tr- Orn. 1831, 35. 



Ibycter fasciatus Gray, Gen. B. fol. i, 1844, 9; Hand List, i, 1869, 5.— Strickl. 

 Orn. Syn. i, 1855, 33.— Siiarpe, Cat. Ace. B. M. 1874, 34 (foot-note). 

 Fandion strigilatus Gray, in Griff. Cuv. i, 1829, 42. 



Hah. — Amazonian district, reacbinf]^ into Ecuador on the west, British 

 Guiana on the north, and exteuding along Eastern Brazil as far south 

 as latitude 30° south (Sharpe). 



Descri^Jtion. 



Wing, 11.75-12.70; tail, 7.80-8.00; culmen, 0.75-0.80; tarsus 

 1.90-2.00; middle toe, 1.40-145. 



Adult. — Uniform glossy black, with a bluish reflection. Tail with a 

 basal (exposed) zone of white. Bill yellow; orbital region and feet red. 



Young. — Similar, but black duller, more purplish, and white at base 

 of tail more extended (covering about the basal two-thirds), and crossed 

 with several incomplete black bars or rows of black spots, these de- 

 creasing in width and continuity toward the base. 



Bemarls. 



Mr. Gurney's remarks in the Ibis (January, 1875,) on the plumage of the 

 young of this species are important, and we shall therefore quote that por- 

 tion of them bearing directly on the question of I. fasciatus, (Spix). Mr. 

 Gurney says that in the young bird, " the white caudal band extends over 

 the upper two-thirds of the tail, and is crossed by five successive transverse 

 black bars, increasing in breadth from the top downward, the uppermost 

 bar being about a quarter of an inch in depth, and the lowest nearly half 

 an inch, causing the general appearance of the tail to bear a marked 

 resemblance to the tail of the adult of Ibycter cMmachima. The remain- 

 der of the plumage of this specimen is of a paler and more purplish black 



