1917] ECONOMIC ZOOLOGY ENTOMOLOGY. 157 



die of June and were at their maximum abundance about July 7. The evidence 

 would indicate that in this infestation at least some portion of the larval feetl- 

 ing took place in the fall and was resumed in the spring, and that the adult 

 period of life extended over several months. 



Examinations of beds that had been stripped of plants and cultivated every 

 two or three days as recommended showed numerous dead pup^. but indicated 

 that some larvae at least pupated lower than a harrow would reach. This led 

 to the recommendation that plowing be done once or twice in order to reach the 

 more deeply-placed pupfe. Later when the beetles emerged trapping methods 

 were resorted to with considerable success, weed piles placed between the beds 

 having proved more effective than the use of boards or burlap. The use of re- 

 pellants was recommended and it is advised that beds cleared of plants be not 

 reset until the adult beetles disappear. 



The soy bean stem borer, H. L. Dutt (Agr. Jour. Bihar and Orissa [India], 

 S (1915), No. 1, pp. 52-56, figs. 3).— With the introduction of the soy bean on 

 an experimental scale at Sabour a cerambycid beetle of the genus Nupserha 

 has appeared and become a source of serious damage. An account is given of 

 its life history and habits, togetlier with recommendations as to the prevention 

 of injury, and remedial measures. 



Rhynchophora or weevils of northeastern America, W, S. Blatchlet and 

 C. W. Leng {Indimiapolis: The Nature Publishing Co., 1916, pp. 682, figs. 155). — 

 This volume, following the plan adopted in the senior author's Coleoptera or 

 Beetles of Indiana (E. S. R., 24, p. 259), furnishes keys to the families, sub- 

 families, tribes, genera, and species of Rhynchophora. A total of 1,084 species 

 are described as occurring in the United States and Canada, east of the Missis- 

 sippi River. The description of each species is followed by notes on its distri- 

 bution, food, habits, etc., so far as known. The classification used is mainly 

 that of LeConte and Horn, modified where necessary by recent studies. 



A bibliography of the principal works to which reference has been made in 

 the text, and an index to the plants mentioned, to the families, subfamilies, 

 tribes, and genera, and to the new genera, species, and varieties, are included. 



The Cottonwood borer, F. B. Milliken (U. S. Dept. Agr. Bui. 424 (1916), 

 pp. 7, pi. 1, figs. 3). — This is a report of studies of Plectrodera scalator in Cot- 

 tonwood (Populus deltoides) and willow (Salix alba) made at Garden City, 

 Kans., in 1913. 



The eggs are deposited in the trunks of cottonwoods at or a little below the 

 surface of the ground, principally during July and August. Tlie young larvae 

 cut the bark and prevent the sap flow and the large larvae tunnel the wood, 

 thus weakening the resistance of the trees to the wind. The adults emerge from 

 about the middle of June to the first of August of the second summer following 

 emergence from the eggs. 



It is pointed out that oviposition in shade trees may be prevented by screen- 

 ing the bases and directions are given for the preparation of such screens. 

 " The young larvae can be removed before they injure the trees severely if the 

 remedial work is done during the first two weeks of September, but removal 

 of the large larvae from deep tunnels often injures the trees more than would 

 the larvae if allowed to remain and complete their development." 



The southern com billbug, Z. P. Metcalf (N. C. Agr. Ext. Serv. Circ. 19 

 (1916), pp. 21, figs. iS).— This is a summarized account of a pest that is a very 

 destructive enemy of corn in the eastern part of North Carolina. Reports of 

 studies made of this insect by Smith in North Carolina (E. S. R., 29. p. 56), 

 Kelly in southern Kansas and northern Oklahoma (E. S. R., 25, p. 159), and 

 Hayes in southern Kansas (E. S. R., 35, p. 760) have been previously noted. 



