20 ARKIV FÖR ZOOLOGI. BAND 13. NIO 4. 



16. Rupornis ruflcauda (Sclater and Salvin). 



Asturina ruficauda Sharpe, Cat. Birds Brit. Mus. I, 1874, 205 (Pearl Islands). 

 Rupornis ruficauda Thayee, and Bangs, Bull. Mus. Comp. Zoöl. XLVI, 1905, 

 144 (San Mgiuel). 



BovALLius' Collection: 1 c^, San José, April 26. 



The present specimen entirely agrees with the descrip- 

 tion of this Hawk from the Isthmus of Panama given by 

 Salvin and Godman (Biol. Centr.-Am. Aves III, 1900, 76). 



Measurements : 



wing 225.5, tail 160, culmen 19, tarsus 161 mm. 



17. Urubitinga anthracina (Lichtenstein). 



Urubitinga anthracina Thayee, and Bangs, Bull. Mus. Comp. Zoöl. XLVI, 

 1905, 144 (San Miguel). 



BovALLius' Collection: 1 $, Bayoneta, April 19 — 1 ?, 

 San José, April 26 — 1 $, young, San Äliguel, P^a Matadoro, 

 May 2. 



Thayer and Bangs found the specimens collected by 

 Mr. Brov^n in San Miguel (1 $ ad., 1 $ juv.) not differing from 

 the mainland ones. Nor in the present examples am I able 

 to detect any characters differing from the typical ones. 



The measurements of the two adult females are as follows: 

 $, Bayoneta: wing 347, tail 185, bill from cere 27, tarsus 85 

 mm. ?, San José: wing 341, tail 187, bill from cere 28,5, tar- 

 sus 85 mm. 



18. Regerinus uncinatus (Temminck). 



Regerinus uncinatus Thayer and Bangs, Bull. Mus. Comp. Zoöl. XLVI, 

 1905, 145 (Saboga). 



BovALLius' Collection: 1 J", Pedro Gonzalez, April 22. 



Measurements : 



wing 275, tail 188, bill from cere 30.5 tarsus 32 mm. 



19. Ictinia plumbea (Gmelin). 



Ictinia plumbea Bangs, Auk. XVIII, 1901, 25 (San Miguel). 

 Ictinea plumbea Thayer and Bangs, Bull. Mus. Comp. Zoöl. XLVI. 1905, 

 145 (San Miguel). 



BovALLius' Collection: 1 c^, Trapiche, April 23. 



