222 



The percentage of parasitism in female grasshoppers was unusually 

 high, varying from 25 to 76 per cent., that in males being 2-21 per 

 cent. 



No males having been found, the life-history is obscure, and the 

 manner in which grasshoppers become infested is not known. The 

 parasite being so large, it is probable that the grasshopper will prove 

 to be only the secondary host. The whole subject is one for further 

 investigation, since the parasite may prove to be worthy of intro- 

 duction as a natural control in regions where grasshoppers are a pest. 



Wilcox (A. M.). Ascogaster carpocapsae, a Parasite of the Oriental 

 Moth. — Psyche, Boston, Mass., xxv, no. 1, February 1918, p. 17. 



The oriental moth, Cnidocampa jlavescens, Walk., a native of Japan, 

 was first discovered in America in 1906, where there is the possibility 

 of its becoming a widespread pest, though at present the infestation 

 is confined to a small area. 



Attempts to rear parasites from the larvae and cocoons of the moth 

 proved unsuccessful till June of 1917, when a single Braconid parasite 

 emerged, which has been determined as Ascogaster carpocapsae, Vier., 

 originally described as a parasite of Cydia pomonella (codling moth). 



FuNKHousER (W. D.). Biology of the Membracidae of the Cayuga 

 Lake Basin. — Cornell Univ. Agric. Expt. Sta., Ithaca, N.Y., 

 Memoir II, June 1917, 445 pp., 22 plates, 9 figs. [Received 26th 

 March 1918.] 



This comprehensive memoir is a summary of seven years' field and 

 laboratory work in the vicinity of Ithaca, New York. The family 

 Membracidae, which occurs chiefly in South America, Africa and 

 southern Asia, is represented in North America by only 40 genera, 

 many of these having only a single species. In the northern States, 

 New York yields the greatest number of species, which are, however, 

 not characteristic of the family. The memoir concludes with a 

 bibliography of 261 works. 



Keuchenius (P. E.). Waarnemingen over Ziekten en Plagen bij 

 Tabak (Derde Serie). De Tabaksboeboek (Lasioderma) en de 

 Tabaksmot {Setomorpha). [Observations on Diseases and Pests 

 of Tobacco. Third Series : The Tobacco Beetle and the Tobacco 

 Moth.] — Reprint from Meded. Besoekisch Proef station, no. 26, 

 1917, 56 pp., 1 plate, [sine loco] [Received 4th March 1918.] 



The second of this series of papers on tobacco pests has already 

 been abstracted [see this Review, Ser. A, iv, p. 79]. 



The large stocks of tobacco that have accumulated in the Dutch 

 East Indies owing to the War have increased the importance of 

 Lasioderma serricorne, F., and Setomorpha margalaestriata, sp. n., as 

 pests of this product. 



A description of L. serricorne is given, with full biological data, 

 mostly from existing literature. In the Besoeki district (Java) this beetle 

 began to be noticed as a pest of tobacco about 1907. This was probably 

 due to the gradual encircling of the isolated drying sheds by native 

 houses — thus forming permanent foci of infestation — and to the 



