758 EXPERIMENT STATION RECORD. [Vol. 37 



methods of control; the second part (pp. 14, 15), by B. R. de Ong, with a 

 method of poisoning pocket gophers, which consists in the use of sweet 

 potatoes, parsnips, or carrots, 8 qt. ; flour paste, 0.5 pint ; strychnin alkaloid, 

 powdered, 0.25 oz. ; and saccharin, 0.0625 oz. 



Varying hares of the prairie ProAdnces, N. Cbiddle {Agr. Gaz. Canada, 

 Jf (1917), No. 4, pp. 260-263). — Lepus americanns and its various geographic 

 races, with a range in western Cannda almost as extensive as the woodlands, 

 is a source of great injury to young trees through gnawing and eating the 

 bark. The destruction of acres of aspen poplars in this way after a severe 

 winter is said to be not an uncommon sight. Larches are also denuded of their 

 bark, while spruce and pine are generally stripped of their branches. The 

 greatest injury thus far recorded is said to have occurred during the winter of 

 1915-16. Enormous numbers of aspen poplars were destroyed in southern 

 Manitoba and Saskatchewan and the infestation appears to have extended far 

 northward. Practically all kinds of trees and shrubs were attacked, plum, 

 cherry, and apple trees frequently being cut to the ground and in some in- 

 stances quite old orchards were badly injured. 



Tlieir natural enemies are briefly considered, as are methods of protection by 

 means of poultry netting, poisoning, and shooting. 



On the ecology of the vegetation of Breckland, E. P. Farbow (Jour. Ecology, 

 5 (Wll), iVo. 1, pp. 1-18, pis. 6, fig. 1). — This deals with the general effects of 

 rabbits on the vegetation. 



Description of a new race of Say's ground squirrel from Wyoming, A. H. 

 Howell {Proc. Biol. Sac. Wash., .in (1917), pp. 105, 106). — Callospcrmophilui 

 lateralis caryi n. subsp. is describoil from Wyoming. 



Two new pocket mice from Wyoming, E. A. Goldman (Proc Biol. Soc. 

 Wash., SO (1917), pp. U7, US'). 



Mutanda oruithologica. I, II. H. C. Obebholser (Proc. Biol. Snc. Wash., SO 

 (1917), pp. 75, 76. 125. 126). 



The birds of South America, I>ord BBABorBNE and C. Chiijb (London: R. H. 

 Porter, 1912, vol. 1, pp. .\lX+50i, pi. 1). — This first volume, which consists of 

 a list of South AnuMican birds, terminates a propo.setl 16-volume work, owing to 

 the death of T.ord Bral>ourne at the front in 1915. It contains a systematic 

 index, a classified and systematic list of 4..561 forms representing 874 genera, 

 and an alphabetical index. 



Illustrations to the birds of South America. H. Gronvold (London: John 

 Whcldon d Co., vol. 2, 1915, pt. 1, pis. 19; 1916, pis. 2, pl». 4; S, pis. 4; 4, pis. 4; 

 5, pis. 4} 1917, pt. 6, pp. 11, pis. S). — The.se six parts consist of colored plates 

 of the game birds and waterfowl of South America, originally intended to form 

 part of 400 hand colored plates illustrating the above-mentioned work. Short 

 descriptive notes by H. K. Swann on most of the species illustrateii preface the 

 same. 



A new honey eater from the Marianne Islands. A. Wetmork (Proc. Biol. 

 Soc. Wash., SO (1917), pp. 117. US). — Myzomcla t-ubratra saffordi n. subsp. is 

 described from the islands of Guam and Saipan. 



A new shrew from Nova Scotia, H. H. T. Jackson (Proc. Biol. Soc. Wash., 

 SO (1917), pp. 149, 150). — A new shrew Is described under the name Sorex 

 fiiineus umbrosu^. 



Description of a new genus of Anatidae, H. C. OBSBHOLSix (Proc. Biol. Soc. 

 Wash., SO (1917), pp. 119, 120).— The genus Horizonetta is erected for the Lay- 

 san teal (Anas laysanen^is) . 



Notes on rearing insects for experimental purposes and life history work. 

 A. M. Wilcox (Psyche, 24 (1917), No. 1, pp. 7-12. pis. 2). 



