RENDAHL, BIRDS FROM THE PEARL ISLANDS. 19 



the above mentioned Pelicans, which revelled at the drained 

 shore. 



Some specimens of the Black Vulture ware seen in S e n- 

 nora. 



Fam. Falconidae. 

 13. Polyborus cheriway (Jacquin). 



Polyhorus cheriway Thayer and Bångs, Bull. Mus, Comp. Zoöl. XLVI, 1905, 

 144 (Pacheca). 



Afdubon's Caracara was not collected in the Pearl Is- 

 lands by Dr. Bovallius. 



The distribution of this bird extends from northern Lower 

 California, Arizona, Texas, and Florida to Guiana and Ecu- 

 ador, so its appearance in the Pearl Islands is by no means 

 remarkable, in as much as it was found, by Bovallius at 

 Panama Vieja, near the City of Panama. Thayer and Bångs 

 record only the finding of two specimens in Pacheca, S and 

 9, xA.pril 14. 



14. Milvago cliimachima (Vieillot). 



Milvago chimachima Thayer and Bångs, Bull. Mus. Comp. Zoöl. XLVI, 

 1905, 144 (San Miguel; Saboga). 



Bovallius' Collection: 1 (^, 1 $, Viveros, April 4 — 

 1 pull. (in spiritu), same locality — 1 ?, Trapiche, April 20 — 

 1 $, young, San José, April 27. 



15. *Buteo abbreviatus (Cabanis). 



Buteo abhreviatus Thayer and Bångs, Bull. Mus. Comp. Zoöl. XLVI, 1905, 

 144 (San Miguel, March 6 and 11). 



The Zone-tailed Hawk was not collected by Dr. Boval- 

 lius. 



The quoted authors don't indicate this bird, of which 

 Mr. Brown collected two specimens, as a migrant in the Pearl 

 Islands, but one can surely only consider it as being a winter 

 visit or there. 



Carriker says in his above cited list of the Costa Rican 

 birds (p. 457), that B. abhreviatus in this country is a rare 

 migrant, «While the balance of the few that go further south 

 than Mexico, drift on to Panama and South America ». 



