1917] ECONOMIC ZOOLOGY — ENTOMOLOGY. 757 



A species of Chrysomyxa new to North America, H. S. Jackson {Abs. in 

 Phytopathology, 7 (1917), iVo. 1, p. 78). — The author reports a short-cycled form 

 referable to the genus Chrysomyxa occurring on leaves of Picea engchnannii. 



Mycelium of the white pine blister rust, R. H. Colley (Abs. in Phyto- 

 pathology, 7 (1917), No. 1, p. 77). — The author describes some of the morpho- 

 logical characters of the mycelium of Cronartium ribicola as it occurs on the 

 white pine. 



Pycnial scars, an important diagnostic character for the white pine blister 

 rust, R. H. CoLLEY (Abs. in Phytopathology, 7 {1917), No. 1, p. 77).— The occur- 

 rence of scars due to pycnia is said to offer a valuable diagnostic character for 

 the identification of the white-pine blister rust. 



" Black thread " disease of Hevea in Burma, J. F. Dastub (Dept. Agr. 

 Burma Bui. 14 (1916), pp. ^, pi. 1). — A brief account is given of the develop- 

 ment and spread of the black thread disease of Hevea in Burma due to Phy- 

 topthora sp. The fungus remains dormant in the tissues during the monsoon 

 after tapping is stopped, and resumes activity when tapping is resumed. The 

 principal measures reconmiended as preventive are thinning out thickly planted 

 areas, removal of diseased fruits, and suspension of tapping on trees showing 

 black thread. 



Phytophthora sp. on Hevea brasiliensis, J. F. Dastur (Mem. Dept. Agr. 

 India, Bot. Ser., 8 (1916), No. 5, pp. 217-232, figs. iO).— This is a more detailed 

 account than that above noted of the Phytophthora disease of H. brasiliensis, 

 which is thought to have been present in Burma since 1903, at least on Hevea 

 fruits. 



The effects of the fungus attack on the tapping areas and in the epidermal 

 cells of the fruit are described, as are also studies in the morphology and 

 biology of the fungus. These are claimed to show that there may be two stem 

 diseases present in H. brasiliensis due to different species of Phytophthora, 

 one of these being P. faberi. In those parts of Burmi. where the rainfall is 

 not excessive, the author fouad that suspension of tapping during the rainy 

 season checked the disease. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



New mammals from North and Middle America, E. A. Goldman (Proc. 

 Biol. Soc. Wash., 30 (1917), pp. 107-116) .—The San Miguel Island opossum 

 {DidelpJiis marsupialis particeps) from San Miguel Island, Panama; savanna 

 marmosa (Marmosa mexicana savannarum) from Panama; Bangs collared 

 peccary (Pecari angvlatu^ bangsi) from Panama; Pinacate desert mouse 

 (Peromyscus eremicus papagensis) from Sonora, Mex. ; Nevada bushy tailed 

 wood rat (Neotoma cinerea lucida) from Nevada; "Wyoming kangaroo rat 

 (Perodipus ordii luteolus) from Wyoming; black naped agouti (Dasyprocta 

 punctata nuchalis) from Panama; Richmond's agouti (D. punctata richmondi) 

 from Nicaragua; Nelson's false vampire (Vampyrus spectrum nelsoni) from 

 Vera Cruz, Mex.; and the northern yellow-shouldered bat (Sturnira lilium par- 

 videns) from Papayo, Guerrero, Mexico, are described as new. 



The conservation of our northern mammals, C. G. Hewitt (Com. Conserv. 

 Canada Rpt., 7 (1916), pp. 32-JfO, pis. 2). — This paper deals particularly with 

 the caribou, musk ox, etc., and means for their protection. Colored maps show 

 the approximate distribution of the barren ground caribou (Rangifer arcticus) 

 and musk ox (Ovibos moschatus) and related forms in Canada. 



Control of the pocket gopher in California (California Sta. Bui. 281 (1917), 

 pp. 1.5, figs. Jf). — The first of the two parts of this bulletin (pp. 3-13), by 

 J. Dixon, deals with the natural history of the pocket gopher and various 



