VOl iS in ] Recent Literature. 473 



gives, in systematic sequence, a list of all the birds hitherto known to 

 occur in the Philippine Islands, numbering 692 species, with references 

 to the place of description in the British Museum 'Catalogue of Birds,' 

 or elsewhere as the case may require, and states the known distribution 

 of each species within the Archipelago. In the case of species having an 

 extralimital range, this is first given in general terms, followed by the 

 Philippine range, giving a list of all the islands where the species has been 

 found to occur, as is done in the case of species restricted to the Archipelago. 



The 'Introduction,' by Prof. Worcester, after stating the origin, scope, 

 and general character of the work, gives a summary of the authors' con- 

 clusions relative to the zoological relationships of the islands, which are 

 divided into twelve "zoologically distinct groups," each of which "has 

 its highly characteristic species and forms a fairly natural division." 



The preparation of the Hand-List was begun by Prof. Worcester some 

 four years (now five years) ago, but was "little more than begun" when 

 the services of Mr. Richard C. McGregor were secured as collector of 

 natural history specimens, to whom the work was turned over. "It is 

 only fair to Mr. McGregor," says Prof. Worcester, "to say that from that 

 time until August 15, 1905, on which date he left for a well-earned rest 

 in the United States, most of the work upon the Hand-List was performed 

 by him. My own subsequent connection with it has been confined to 

 consultation with him on doubtful points and the final editing of the 

 manuscript." 



The arrangement as regards sequence of families is that of Sharpe's 

 'Hand-L'.t,' as far as published (Vols. I-IV), the remaining families 1 

 following the arrangement recently proposed by Dr. Shufeldt. Naturally 

 great care has been exercised in the preparation of the list, no species 

 having "been recorded definitely from any island except upon authority 

 believed to be unimpeachable." It is proposed to publish addenda from 

 time to time, as new information comes to hand, until sufficient matter 

 has been accumulated to justify the revision of the entire list. The work 

 is furnished with two indexes, one for the genera and species, the other 

 for the higher groups. 



It remains for us to extend to the authors our hearty congratulations 

 for the evident thoroughness of preparation and the early appearance of 

 this useful key to the ornithology of our possessions in the far East, which 

 constitute a region of exceptional zoological interest. — J. A. A. 



Oberholser's Revision of the Genus Collocalia. 2 — This interesting 

 genus of Swifts is one of the most difficult in the entire family Micropodidse. 

 In this detailed study of the group Mr. Oberholser recognizes 32 forms — 



1 A famHy heading for OrioJus (p. 106) appears to have been accidentally omitted. 



2 A Monograph of the Genus Colloralia. By Harry C. Oberholser. Proc. Acad. 

 Nat. Sciences of Philadelphia, Vol. LVIII, Part 1, 1906, pp. 177-212. 



