1919] ECONOMIC ZOOLOGY — ENTOMOLOGY. 753 



3, pp. 397, 398). — In September, 1917, isolated and comparatively shallow rooted 

 oaks on dry calcareous soil southwest of the Vaudois Jura at an altitude of 

 1,850 ft. were observed to have lost in some cases as much as 1 per cent of their 

 twigs. The trouble proved to be due to D. taleola. The same fungus is said to 

 have caused similar injury in other localities mentioned. 



The distribution of mistletoe in Switzerland, .T. Coaz (Naturw. Ztschr. 

 Forst u. Lundw., 16 {1918), No. 3-8, pp. 138-195, figs. 3).— A discussion of mis- 

 tletoe in Switzerland concludes with a comparison between Switzerland and 

 Germany as regards the occurrence, distribution, and hosts of mistletoe in the 

 two countries. 



ECONOMIC ZOOLOGY—ENTOMOLOGY. 



Game laws for 1919, G. A. Lawyer and P. L. Earnshaw (U. 8. Dept. Agr., 

 Farmers' Bui. 1011 (1919), pp. 80). — This is tlie usual annual summary of the 

 provisions of Federal, State, and Provincial statutes (E. S. R., 40, p. 54). 



The animal ecology of Johnson County, D. M. Brumfiel (Univ. Iowa 

 Studies Nat. Hist., 8 {1918), No. 1, pp. 31, pis. 23).— A preliminary survey of the 

 major animal habitats of Johnson County. Iowa, with an atlas. 



A nest study of the Maryland yellow throat, N. E. Shaver {Univ. Iowa 

 Studies Nat. Hist., 8 {1918), No. 2, pp. 12, pis. Jj). — ^Tliis paper is based upon a 

 continuous study of the nest life of GeotliTypis tricJias trichas, made during the 

 summer of 1917 at the Iowa Lakeside Laboratory on Lake Okoboji. 



The nest studied contained three eggs of the yellow throat and one of the 

 cowbird. The shell of the cowbird's egg by adhering to one of the yellow 

 throat prevented the latter from hatching, causing SSJ per cent mortality. Data 

 presented in tabular form show the feeding activity of the parent birds, distri- 

 bution of food to the young, classification of nestling food, and sanitation of 

 the nest. The data show that the cowbird received 55 per cent of all the food 

 brought to the nest. 



A list of birds observed in Clay and O'Brien Counties, Iowa, I. N. Gabriel- 

 son {Proe. Iowa Acad. Sci., 24 {1911), pp. 259-212). 



Birds of the Kansas City region, H. Harris {Trans. Acad. Sci. St. Louis, 23 

 {1919), No. 8, pp. 213-311, figs. .})• — This work includes a summary of the dates 

 on which the regular spring migrants may be looked for, residents which 

 occur in the vicinity throughout the entire year, winter residents, irregular 

 winter residents, summer residents, occasional or very rare breeders, former 

 breeders, possible breeders, and migrants, a bibliography of 18 pages, and a 

 subject index. 



Studies of the birds in northwest Australia, R. Soderberg {K. Svenska 

 Vetenslc. Akad. Handl., 52 {1918), No. 11, pp. 116, pis. 5, figs. 25).— A report of 

 ornithological researches conducted in tropical northwest Australia. 



Studies of the tsutsugamushi disease, T. Kitashima and M. Miyajima 

 {Kitasato Arch. Expt. Med. [Tokyo], 2 {1918), No. 2, pp. 90-1^6, pis. 6).— A 

 further report of studies of this affection, also known as Nippon river fever, 

 which is transmitted by tlie larva of a trombidild {Leptus akamushi) that 

 develops on field mice {Microtus montibelH). It occurs in certain river 

 valleys of .Japan and also in Formosa (E. S. R., 39, p. 870). 



Camallanus americanus n. sp. — A monograph on a nematode species, T. B. 

 Magath {Trans. Amer. Micros. Soc., 38 {1919), No. 2, pp. 1,9-110, pis. 10, figs. 

 16). — This monograph deals with a parasitic nematode found in the upper 

 2 in. of the intestine of certain turtles. Of 47 turtles examined 78 per cent 

 were parasitized. 



