761 



controlled, but in many cases in Porto Eico and elsewhere trash is 

 needlessly burned. The abundance of the pest depends in large part 

 upon the scarcity of its cosmopolitan and omnipresent egg-parasite 

 Tn'c/ioqramma minutum. As the result of field-experiments in Texas 

 and Louisiana, Mr. T. E. Holloway has conclusively shown that the 

 burning of the cane-trash (tops and leaves) after the cane is harvested, 

 destroys large numbers of T. minutum [see this Review, Ser. A, ii, 

 p. 279]. In a table given in the present paper, the borer infestation 

 in fields where the trash had been burnt is shown to be nearly 100 

 per cent, higher than in unburnt fields. In the discussion following 

 this paper, Mr. 0. H. Swezey pointed out that T. minutum has a short 

 life-cycle and if the trash could be left for a short time, the adults 

 would emerge. 



Weiss (H. B.). Gri/llotalpa gri/Uolalpa, Linn., the European Mole 

 Cricket in New Jersey. — Jl. Econ. Entom., Concord, viii, no. 5, 

 October 1915, pp. 500-501. 



Gryllotalpa gryllotalpa, was found cutting of? the roots of various 

 plants in a nurseiy in Rutherford, N.Y., early in July 1915. Large 

 quantities of imported plants are received every year at Rutherford, 

 the majority coming from Belgium and Holland and only a small 

 portion from France. It is almost certain that the insect came from 

 one of the two former countries. The usual remedies are mentioned. 

 The presence of this pest in New Jersey is an example of how 

 impossible it is to keep out all foreign pests by a close inspection of 

 foreign plants. 



Harned (R. W.). The Corn-silli Beetle, Lupemdes varicornis, Lee, 



and its Control. — Jl. Econ. Entom.. Concord, viii, no. 5, October 



1915, pp. 507-508. 



About 1st July 1915, the Chrysomelid beetle, Luperodes varicornis, 



Lee, appeared in enormous numbers in many maize fields of several 



counties in Mississippi. In one case, several hundred could be picked 



of? one ear of maize. The ears have the appearance of having had the 



silk cut off as with a knife. As the beetles congregated only on the 



silk at the end of the ears, five or six feet from the ground, difficulty 



was at first encountered in properly applying arsenical poisons. 



Mr. D. L. Williams overcame this difficulty by filling an ordinary 



" talcum powder" can with Paris green and walking between the rows 



and shaking the poison directly upon the silk. One man could cover 



several acres a day in this way and relief was immediately obtained. 



Whitmarsh (R. D.). Some Important Insect Pests of the Greenhouse. 



—Ohio Agric. Expt. Sta., Woosler, Ohio, Circ. no. 154, May 15th 

 1915, pp. 93-104, 10 figs. [Received 2nd November 1915.] 



This bulletin deals with Aleurodes vaporariorum, Tetranychus telarius. 

 Aphis gossypii, Macrosiphum (Nectarophora) rosae, Rhopalosiphum 

 violae, N. chrysanthemicoleus and two Coccids, Pseudococcus citri 

 and P. longispinus. A brief account of each insect is given and of the 

 inethods of control. Fumigation is of no avail against red spider and 



