ARKIV FÖR ZOOLOGI. BAND 13. N:0 4. 



of the group, for some weeks, from the end of April to the 

 middle of May. The results of this trip were published by 

 OuTRAM Bångs in Auk, 1901, XVIII, p. 24. The number 

 of collected species was fortytwo. 



A second expedition was made by Mr. Brown in the 

 year 1904, the latter part of February to the latter part of 

 April. During this trip he visited the islands San Miguel, 

 Saboga, and Pacheca. The account of this journey, published 

 by Thayer and Bångs in Bull. Mus. Comp. ZoöL, 1905, XL VI, 

 p. 137, contains the records of 94 species of birds known from 

 the Pearl Islands, i e. from San Miguel, Saboga, and Pacheca. 

 93 of them were collected by Mr. Brown, one is quoted ac- 

 cording to a statement in the literature. 



Doctor Bovallius collected during his visit in the following 

 islands: Pacheca, Saboga, Chapera, Pajaros, Casaya, Bayoneta, 

 Viveros, Sennora, Pedro Gonzalez, Trapiche, San José, San 

 Miguel, San Elmo, and Cangrejo. The species of birds collected 

 or observed by him are 54. Six of them were before unknown 

 in the Pearl Islands, and theref ore the number of species amount 

 to 100, one of them, however, being if at all found in the islands, 

 certainly but an occasional straggler. 



In the following table I give the number of species found 

 in the different islands of the Archipelago. 



