469 



Hah. — Tropical America, from the frontier of Paraguay (latitude 28'^ 

 south) througli Brazil and Colombia to Yeragua. 



List of specimens in the United States National Museum. 



Otlier specimens examined. 



Mus. Pliiiad. Acad., 8 ; Amer. Mas., N. Y., 2 ; Boston. Soc, 4; Mus. Coiiip. ZooL, 2; 

 G. N. Lawrence, 2 — total, 24. 



Measurements. 



Ibtjcter ViEiLLOT, Analyse, 1816, 22 [tvpe, Falco americanus Bodd.]. 



Eapt. Nor. Mus. 1864, 29. 

 Ihicter Kaup, 1845, {fide Gray). 



;5. Baptrius. 



-GuRXEY, Cat. 



Daptrius -YiYAhhOT, Analyse, 1816, 22 [type, D.a/erVieill.].— Sunder. Disp. Ace. Heme- 



roharp. 1874, 39. 

 Gipnnops Spix, Av. Bras, i, 1824, 11 [type, G.fasciatus Spix=D. a<er, juv. !]. 

 Ihijcttr AucT.— GuRXEY, Cat. Eapt. Norw. Mus. 1864, 29. — Sharpe, Cat. Ace. 1874, 34. 



Osteology (of I. americanus). — Skull most like that of Phalcohcenus* 

 (australis), but anterior half of the premaxillary relatively much smaller, 

 the posterior half large, broad, and highly arched; nostril nearly circu- 

 lar, imperfectly rimmed; lachrymals narrower, more pointed.t Length 

 of skull, 2.80 (1.15); breadth, 2.45; height, 1.10-1.20. Sternum, 2.20-2.60, 

 1.35-1.40, 1.15-1.25, 0.50-0.60; posterior margin with two deep indenta- 

 tions, these sometimes connected with a pair of foramina. 



General external features. — General form and appearance very similar 

 to that of the buteonine genera Eostrhanius and Cymindis, the tarsi 

 being unusually short, t?he remiges greatly developed, and the tail long 

 and broad. Bill much as in Milvago, but cere larger, and the irregular- 

 ities of the tomia less distinct. ]!*[ostril circular, imperfectly rimmed, the 



* Should we be correct in our supposition that the bones described under the head of 

 Milvaejo as probably of that genus, then we should say that Ihijcter is very much more 

 like Milvarjo in its cranial characters; but there is a possible susi)icion that they 

 may belong to Ihijcter (Daptrius) ater. 



t The palatines are wanting in the only specimens before us. 



