abstracts: ornithology 201 



MAMMALOGY. — The Wisconsin Napaeozapus. Hartley H. T- 

 Jackson. Proc. Biol. Soc. Wash. 32: 9-10. February 14, 1919. 



The cooperative field work of the U. S. Biological Survey and Wis- 

 consin Geological and Natural History Survey during the summers 

 of 191 7 and 1918 resulted in the collection of seven specimens of Nap- 

 aeozapus from four localities in northern Wisconsin. This is a definite 

 westerly extension of the previously known geographic range of the 

 genus. The Wisconsin animal represents a clearly defined form which 

 is named Napaeozapus insignis frutectanus. H. H. T. J. 



ENTOMOLOGY. — The case of the genera Rhina and Magdalis. W. 

 DwiGHT Pierce. Proc. Ent. Soc. Wash. 20: No. 4. Pp. 72-78. 

 September 27, 191 8. 



This article straightens out a peculiar nomenclatorial tangle of these 

 two genera, and gives tables of the subgenera of Magdalis and of the 

 North American species of the genus. This is the first attempt at a 

 coordination of the European and American classifications of this 

 group. W. D. P. 



ORNITHOLOGY.— r/t^ migration of North American birds. III. The 

 summer and hepatic tanagers, martins, and barn swallows. Harry 

 C. Oberholser. Bird Lore 20: 145-152. 1918. 



The tables of migration data in this paper concern the following 

 species, together with their subspecies: Piranga rubra, Piranga 

 hepatica, Progne subis, and Hirundo rustica. By means of these tables 

 it is possible to trace the migratory movements of these species both 

 in spring and in autumn, from north to south. In addition, the breeding 

 and winter ranges of each of the species and subspecies are given, 

 together with the same information for Progne cryptoleuca and Progne 

 chalybea, both of which, however, cannot be considered as of regular 

 occurrence in North America. The average of arrival and departure 

 at the various localities are in ^ome cases based on records extending 

 over as many as thirty-two years, though in most cases considerably 

 less. ' H. C. O. 



ORNITHOLOGY. — The common ravens of North America. Harry 

 C. Oberholser. Ohio Journ. Sci. 18: 213-225. May, 1918. 



The subspecies of the common raven, Corvus corax Linnaeus, are 

 among the most difficult birds of the family Conndae. The differ- 



