156 EXPERIMENT STATION RECORD. 



adult ill May. The tree is quickly killed and some damage doue to the outer 

 layers of the wood, but chiefly to the sap wood. 



Otiorhynchus sulcatus on the island of Oleron, J. Feytaud {Bui. Sac. 

 j^tudes et Viilg. Zool. Agr., IS (1914), ^'os. 1, pp. 1-14, fius- 3; 2, pp. 21-25; 4, 

 pp. 53-55; abs. in Rev. Api)l. Ent., 2 (1914), Set: A, Nos. 4, PP- 229, 230; 6, pp. 

 360, 361). — This article deals with O. sulcatus. its natural enemies, and remedial 

 measures. It is a vineyard pest that was first observed on the island four years 

 ago and has since spread in all directions. The larva attacks the roots and the 

 adult damages the vines by attacking the shoots and arresting their develop- 

 ment. Collection by hand at night from shelter traps is considered the simplest 

 method of combating them. 



The alfalfa weevil (Phytonomus posticus), W. O. Ellis (Washington Sta. 

 Popular Bui. 10 (1914), pp. ^, figs. .'/). — A brief descriptive account of this pest 

 and of control measures. 



On Eurytoma amygdalis which injuries plums and apricots in the Govern- 

 ment of Astrakhan, Y. N. Rodzianko (Ahs. in Rev. Appl. Ent., 2 (1914), Her. 

 A, No. 6, pp. 348, 349). — ^An account of the biology of this chalcidid and the 

 injury which it causes. 



The eggs are dei)osited in the young fruit and the larva lives inside the stone, 

 feeding on the unripened kernel, which it usually destroys. The attacked fruits 

 fall off, either when still green or not half mature, though some may ripen and 

 can not be distinguished from healthy fruits. 



As remedies the collection and destruction of prematurely fallen fruits and 

 the prevention of oviposition are recommended. The collection of immature 

 fruit alone, however, can not be considex'ed adequate as the larvje sometimes 

 inhabit mature fruits. 



Description of two braconids parasitic on Earias, G. C. Dudgeon and L. H. 

 GouGH (Ayr. .Jour. Egypt, 3 (1914), No. 2, pp. 108-110, pis. 2).—Rhogas 

 Jcitchencri and R. lefroyi, two parasites of the Egyptian bollworm. the former 

 also parasitic on the date worm (Ephcstia cautella). are described. 



The common red spider or spider mite, H. E. Ewing (Oregon Sta. Bui. 121 

 (1914), pp. 3-95, pi. 1, figs. 38). — This is a monographic account of the common 

 red spider or spider mite which the author shows to be specifically identical 

 with the common European form (Tctranychus tclarius). It is shown that 

 T. telarius, T. Mmaculatus, and T. gloveri should be regarded as synonymous 

 and that T. sexmaculatus should be considered as only a variety of T. telarius 

 since it apparently differs from the latter, not structurally, but only in size and 

 to some extent in color and habits. Through the employment of the characters 

 of the male genital armature the author has also demonstrated that two sepa- 

 rate species, which have been considered in the past as synonymous with the 

 common spider mite, occur in the Western States, namely, T. fiavus and T. 

 weldoni. 



In reporting life history studies of the species reference is made to the obser- 

 vations of Perkins in Vermont (E. S. R., 9. p. 859), Morgan in Louisiana (E. S. 

 R., 9, p. 1065), Worsham in Georgia (E. S. R., 25, p. 562), McGregor in South 

 Carolina (E. S. R., 27, p. 264). and Parker in California (E. S. R.. 29, p. 261). 



Sixty-three eggs, deposited between October 7 and 25. was the largest number 

 obtained from three mites under observation in October, although Worsham has 

 recorded 94 as having been deposited by a single female. The species reproduces 

 parthenogenetically, but the progeny of the virgin females are always of the 

 male sex. In observations of the incubation period of the egg S days was found 

 to be the maximum, 3 days the minimum, and Syf days the average. The larval 

 stage covers an average active period of 2J days and a quiescent period of 1§ 



