RENDAHL, BIRDS FROM THE PEARL ISLANDS. 27 



Fam. Laridae. 

 *33. Sterna maxima (Boddaert). 



Sterna maxima Thayer and Baxgs, Bull. Mus. Comp. Zoöl. XLVI, 1905, 

 147 (San Miguel, March 15). 



The Royal Tern was not collected by Dr. Bovallius. 



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

 two females were brought by Mr. BRO^vx, as only a winter 

 visit or in the Pearl Islands, but in view of its general distribu- 

 tion in winter from California and Mexico south to Peru and 

 Brazil I find no reason in presuming it to be more than a 

 winter visit or in the islands. 



*34. Hydrochelidon nigra surinamensis (Gmelix). 



No former records from the Pearl Islands. 



Bovallius' CoUection: 1 $, Viveros, April 3 — 1 ?, 

 San ^Miguel, no date. 



Winter range: Mexico to Panama, Peru, and Cliile. 

 Jewel (1. c. page 424) observed in Panama a few of this spe- 

 cies at the Gatun lake from December 3 to 13, 1911. 



Fam. Columbidae. 

 35. Chloroenas rufina pallidicrissa (Chubb). 



Columha rufina Thayer and Baxgs, Bull. Mus. Comp. Zoöl. XLVI. 1905. 147 



(San Miguel). 

 ChlorcEnas rufina 'pallidicrissa Ridgway, Birds Xorth Middle Am. VII. 1916. 



305 (San Miguel). 



Eugexie's Expedition: 1 sp., no sex, Pearl Islands, April 

 1852. 



Bovallius' CoUection: 1 S, Pedro Gonzalez, April 22. 



RiDGWAY says (1. c. pag. 306, foot-note) that he found 

 specimens from San ^liguel Island (as to his table of measure- 

 ments four males and six females) and those from Venezuela 

 and Colombia averaging more deeply colored than those from 

 Central America and Southern Mexico, «But on the whole 

 they seem to agree better with G. r. pallidicrissa than with 

 G. r. rufina». 



Unfortunately I have no material for deciding this ques- 

 tion, but it may be remarked that the present male specimen 



