139 



Genus HETEROSPIZIAS, Sharpe. 



rrnlUinga AuCT. {nee Lafresxaye). 



Spizigeraniis Guay, Hand List, i, 18H9, 9 (nee Kaup, 1844). 



Heterosinzias Sharpe, Cat. Ace. B. M. Iti74, ICO. Type Faho vierkUonaJis Gm. 



Ch. — Similar to Unihifinga, but wiugs larger proportionally, reacliiug 

 to cr beyond the end of the comparatively short tail. Tibial plumes 

 better developed, and feathers of the pileum longer and more lanceo- 

 late. Plumage more variegated, rufous prevailing. Five outer i)ri- 

 maries with inner webs sinuated ; third, fourth, and fifth quills nearly 

 equal and longest, the fourth usually exceeding the rest; first shorter 

 than the seventh. Tail more than half as long as the wing, slightly, 

 but decidedly, emarginated, the lateral pair being longest.* Tarsus 

 much more than twice as long as middle toe; outer toe nearly as long 

 as the middle; inner much shorter; hind toe a little shorter than the 

 inner. Claws moderate in size, of normal form, decidedly graduated, 

 the outer being only about half the length of the posterior, which is 

 equal to its digit. Toes with large transverse plates in an uninter- 

 rupted series, and tarsus with continuous frontal and posterior series of 

 similar scutella?. A well-developed web between outer and middle toes. 

 Less than one-third the upper portion of the tarsus feathered in front. 

 Bill rather small, exactly as in Uruhitinga antliracina. 



With a general correspondence to Uruhitinga in most of the external 

 features of form, this genus, or more properly subgenus, differs suffi- 

 ciently in the greater development of the remiges and tibial plumes, 

 the more lanceolate form of the feathers of the pileum, and the strik- 

 ingly different coloration. 



HETEROSPIZIAS MERIDIOi^ALIS. 



Falco meridioncdis Lath. Ind. Orn. i, 1790, 36. 



Buporni-i meridiouaUs Kaup, Contr. Orn. 1S50, 63. 



Buieogallus meridionalis Scl. P. Z. S. 1S60, 22S. 



Biiteo meridionalis Schl , Mus. P.-B. Buteoues, 1362, 17; Kev. Ace. 1373, llO. — 

 Gray, Hand List, i, 1369, 9. 



rruiitinga meridionalis Scl. »fc. Salv. P. Z. S. 1867, 589 ; 1869, 252 (Plains of Valen- 

 cia, Venezuela) ; ih. 634 (Arg. Rep.) ; Noni. Neotr. 1873, 119. — Wvatt, Ibis, 

 1871, 382.-i-PELZ. Orn. Bras. 1871, 7, 394.— Lee, Ibis, 1873, 136 (Arg. Rep.). 



Vruiitinga (Spizigerantis) meridionalis Ridgw. Pr. Boston Soc. K. H., May, 1873, 63. 



Heterospizias meridionalis Sharpe, Cat. Ace. B. M. 1874, 160. 

 Circus rufulns Vieill. N. D. iv, 1816, 466. 



Astur rnfnlns Strickl. Orn. Syu. i. 1855, 422. 

 Falco rntilans Light. Verz. Doubl. 1823, 60.— Temm. PI. Col. i, 1324, pi. 25. 



Circus rutilans Steph. Gen. Zool. xiii, 1826, 43. 



Bufeo rutilans Less. Man. i, 1828, 104. 



Hypomorplinus rutilans Cabax. Arch. f. Naturg. IS 14, 264 ; Tscbudi Fauna Per. 1S44, 

 17, 84. 



Asturina rutilans BuRM. Tb. Bras, ii, 1856, 80. 

 Aquila huzon Spix, Av. Bras, i, 1824, 6. 

 lUifous-lieaded Falcon Lath. Gen. Synop. Suppl. 1787, 33. 

 Gacilan de esiero Acanelada Azara, Pax. Par. i, 1802, 72.— Hartl. Ind. Azara, 1347, I. 



Hal). — South America, from Xew Granada to Paraguay and Buenos 

 Avres. 



Wing, 15.10-18.50; tail, 8.00-11.00; culmen, 1.00-1.10; tarsus, 

 3.80-4.50 ; middle toe, 1.65-1.85. Adult : — General color pale cinna- 



* Remiges 25. Pterylosis as in Buieo, but external branch of the pectoral stem of the 

 ir.ferior tract only half free, as in Haliuctus. — (Xitzsch.) 



