336 Recently jmblished Ornitholoijical JVorks. 



37. Hoffmann's List of the Birds of Nevada. 



[Annotated List of the Birds of Nevada. By W. J. Ilolhnann, M.D 

 Bull. U.S. Geol. and Geogr. Survey, vol. vi. no. 2 (1881).] 



Dr. ?Ioffmann^s list is based upon notes and observations 

 made in Nevada by several parties during tlic field-season of 

 1871j completed by references to the reports of several pro- 

 minent authorities who have likewise visited the district. 

 Some interesting remarks on the distribiition of the vege- 

 tation as affecting the avifauna of Nevada are prefixed. No 

 other area of like extent within the United States is believed 

 to present a greater variety of physical features. Amongst 

 the less-known species in the list we may note Campylo- 

 rhynchus brunneicapillus, " met with in the sandy deserts 

 north-west of Fort Mogave^ amongst the cactus and yucca ;" 

 Spizella breweri^ " quite common in the northern and middle 

 areas ;" and Icterus buUocki^ a regular summer visitant. In 

 the appendix an accurate account of previous authorities on 

 the birds of Nevada is given. An outline map of Nevada, 

 showing the localities mentioned^ concludes this useful 

 memoir. 



38. Krukenberg on the Colouring-matter of Feathers. 



[Die Farbstoffe der Federn. Von Dr. C. Fr. \V. Krukenberg, zweite 

 Mitth. Vergl.-pbysiol. Studien, ii. Reibe, Abtb. 1, p. 151.] 



A continuation of the author's investigations already 

 noticed (Ibis, 1881, p. 602) on the colouring-matter of birds' 

 feathers. The present part deals with the consideration of 

 turacoverdin (found in the green feathers of the Musopha- 

 gidae), zoarubin (from the red feathers of Cicinnurus), "ara- 

 roth" (from the red feathers of Parrots), zoonerythrin, and 

 corionilphurin (a yellow pigment detected in the yellow 

 scales of the legs of Milvus) . Turacoverdin is the first green 

 feather-pigment that the author has been able to isolate. It 

 contains a fair quantity of iron, but little copper or man- 

 ganese. Its spectrum resembles that of turacin, from which 

 latter pigment turacoverdin may be produced by long expo- 

 sure to air or moisture, or by boiling. 



