Q^O Recent Literature \o^ 



first paper ' is based on his exploration, in company with Mr. E. A. 

 Goldman, of the Tres Marias Islands. After summarizing the -work of 

 previous explorers in these islands, he describes the following ii new 

 subspecies, based on his own collections, made during May, 1S97 : — 

 Columba flavirostris inadrensis, Leptotila ca^ttalis, Buteo borealis fumo- 

 sus, Polyborus cherixvay pallidus, Trogoti ambiguiis goldmatit, Nyctidro- 

 miis albicoUis instilaris, Alyiopagis placens minimus^ Cardinalis cardinalis 

 tnarice, Vtreo hypochryscus sordidus, Melanotic ccerulescens lojigirostris, 

 Thryothorus latvreticii magdah'ncs. The bird fauna as a whole will be 

 treated later. In this connection he states that the study of his material 

 in comparison with that from the mainland, shows " that most of the 



resident land birds of the islands differ in a more or less marked 



degree from their nearest mainland relatives. In most cases the island 

 birds cannot be considered more than geographical races .... Not a 

 single species has been found on the islands which has not a closely 

 related form on the mainland." 



In a second paper" Mr. Nelson describes a number of new birds from 

 various parts of Mexico, from the collections made by Mr. Goldman and 

 himself, for the U. S. Biological Survey. In reference to the diversified 

 climatic areas of Mexico, Mr. Nelson states that in addition to the " two 

 main divisions of highland or temperate, and lowland or tropical," " the 

 highlands contain several definite faunal areas, and the same is true of 

 the lower tropical lands." The new form.s described are the following : 

 Heleodytes b^-umteicapillus obscurus, from the Mexican tableland ; Mreo 

 nanus, southern border of the tableland in Michoacan ; Prague sinaloce, 

 Plomosas, Sinaloa; Pkcenicothraupis rubicoides rosens, Territory of 

 Tepic; Amphispiza bilineata grisea, southern part of tableland; Guir- 

 aca cktapetistx, Chiapas ; Grallaria ochracetventris, San Sebastian, Jalisco ; 

 Ainazi'lia cifmamomea saturata, Chiapas ; Dactylortyx chiapensis, San 

 Christobal, Chiapas ; Dactylortyx devius, San Sebastian, Jalisco. The 

 paper also comprises a revision of the genus Dactylortyx, in which D. 

 thoracicus (Gambel) and D. thoracicus lijieolatus (Gould) are recognized 

 in addition to the two species here described. — J. A. A. 



Cooke's 'Birds of Colorado.'-^ — The publication in March, 1897, of 



' Descriptions of new Birds from the Tres Marias Islands, Western Mexico. 

 By E. W. Nelson. Proc. Biol. Soc. Washington, Vol. XII, pp. 5-11. Jan. 

 27, 1898. 



2 Descriptions of new Birds from Mexico, with a revision of the genus Dac- 

 tylortyx. By E. W. Nelson. Proc. Biol. Soc. Washington, Vol. XII, pp. 57- 

 68. March 24, 1S9S. 



•* Further notes on the Birds of Colorado. Bulletin No. 44, Technical 

 Series No. 4. An appendix to Bulletin No. 37. On the Birds of Colorado. 

 By W. W^ Cooke, Fort Collins, Colorado. March, 1S98, Svo. pp. 148-176. 



