600 Recent Literature. [o c ' t k 



L. leucoptcrus and also some hybrids between L. marinus and L. glaucus 

 ( =hyperboreus) reared at the Zoological Garden at Copenhagen. 



Three plates in color of the former hybrids are given, showing them in 

 several stages of plumage, from juvenal to adult, while there are also dia- 

 grams of the coloration of the wing tips. In connection with the second 

 hybrid, Mr. H. Winge is quoted as suspecting a hybrid origin for the rare 

 Larus nelsoni, and there is a description of a supposed wild hybrid L. 

 marinus x L. glaucus taken at Upernavik, Greenland. 



This paper should be consulted by students of the Laridse, as it may throw 

 light upon some of the still unsettled problems regarding the relationship of 

 certain species of gulls. — W. S. 



Recent Papers by Oberholser. — Six papers by Dr. Oberholser have 

 recently appeared in the ' Proceedings of the U. S. National Museum.' One 

 of these x is a review of the species of the genus Nannus, comprising our 

 Winter Wren and the common Wren of Europe and their allies. Dr. Ober- 

 holser recognizes no less than thirty-six forms of these birds, all of which he 

 regards as subspecies of N. troglodytes. The five American species and 

 subspecies of the A. O. U. 'Check-List' will therefore appear as Nannus 

 troglodytes hiemalis, etc., if his views are to be followed. Furthermore, his 

 studies of the Alaskan birds leads him to recognize three new forms: N. t. 

 kiskensis (p. 228) from Kiska Island, N. t. tanagensis (p. 230), Tanaga Island, 

 and N. t. petrophilus (p. 232), Unalaska Island. 



The birds of the Tambelan Islands, China Sea 2 form the subject of 

 another paper based upon collections of Dr. W. L. Abbott. Twenty-two 

 species are listed, of which Orthorhamphus magnirostris scammophorus (p. 

 133) is described as new. 



Dr. Abbott's collections from Pulo Taya, south eastern Sumatra, are also 

 described by Dr. Oberholser 3 ten species being listed, of which Lamprocorax 

 panayensis richmondi (p. 272) and Cinnyris ornata microleuca (p. 273) are 

 new. 



In a revision of the races of the White-collared Kingfisher, Sauropatis 

 chloris, 4 Dr. Oberholser recognizes twenty-four subspecies, the new ones 

 being: S. c. palmeri (p. 369), Mt. Salak, Java; S. c. azela (p. 377), Engano 

 Island, W. Sumatra; S. c. chloroptera (p. 379), Simalur Island; S. c. 

 amphiryta (p. 382), Nias Island; and S. c. hyperpontia (p. 386), Vate Island, 

 New Hebrides. 



1 Notes on the Wrens of the Genus Nannus Billberg. By Harry C. Oberholser. Proc. 

 U. S. National Museum, Vol. 55, pp. 223-230. 1919. 



2 The Birds of the Tambelan Islands, South China Sea. By Harry C. Oberholser. Ibid., 

 pp. 129-143. 



3 Notes on Birds Collected by Dr. W. L. Abbott on Pulo Taya, Berhala Strait. South- 

 eastern Sumatra. By Harry C. Oberholser. Ibid., pp. 267-274. 



4 A Revision of the Subspecies of the White-collared Kingfisher, Sauropatis chloris 

 (Bodda?). By Harry C. Oberholser. Ibid., pp. 351-395. 



