101 



of Washington, Vol. IV, pp. 133-139, 1898.) A large number of the 

 infested canes were placed in a breeding cage, some of these having in 

 them the eggs of (Ecanthus niveus, and when the young hatched they 

 developed within the cage with no other food than was afforded by the 

 growing canes. They were observed to feed on Diasjns rosce, but at the 

 same time there were some appearances of the foliage of the plants that 

 could only be accounted for on the assumption that the tree crickets 

 had fed from them. 



In October, 1897, a Japan flowering cherry tree, imported from Japan 

 the winter before and planted out in nursery row in April, was again 

 transplanted to the station grounds at Wooster, being placed outside 

 in order to determine whether or not the Coccid, with which it had evi- 

 dently been infested when brought from its native home, would survive 

 the frigid climate of our winters. On March 9, 1898, the tree was 

 examined and of five Diaspis amygdali three were dead and two were 

 evidently in a healthy condition. The lowest temperature which these 

 live females had experienced during the winter was 9° P., on February 

 2 and 3, 1898. While on July 26, present date, the species does not 

 appear to have thrived at all as well as it did on another tree kept in 

 the insectary, yet there is ample proof that a lower temperature than 

 that given above will be necessary to destroy the scales. For informa- 

 tion regarding the second tree, kept indoors, see Can. Ent., Yol. XXX, 

 p. 78, 1898, as it was from the scale of this tree that Archenomus bicolor 

 was reared. 



Serious injury to oats by attacks of wire worms was reported from 

 Eoachton, May 28, rather an unusual occurrence, especially at this 

 season of the year, and raises anew the question as to a remedial or 

 preventive measure that will apply in fields of growing grain. On 

 October 11, 1897, three plats, each 1 rod square, were selected in a field 

 of wheat suffering badly from the attacks of wireworm, and kainit 

 applied to these on the surface of the ground in varying quantities, the 

 first receiving 2 pounds, or at the rate of 320 pounds per acre; the sec- 

 ond 8 pounds, or at the rate of 1,280 pounds per acre, and the third 15 

 pounds, or at the rate of 2,100 pounds per acre. The soil being at the 

 time very dry, about 6 gallons of water was immediately applied to 

 each plat by sprinkling the surface, and a second similar application 

 was made two days later, after which there were abundant rains. By 

 November 18 the worms had ceased working on the wheat, and on that 

 date an examination was made on these plats, and at depths of from 5 

 to 12 inches from the surface, but not below this, a number of wireworms 

 were found, apparently in hibernation. 



On March 16, 1898, the plats were again examined, and samples of 

 the soil taken for chemical analysis. Although samples were removed 

 from all three of the plats, as a matter of fact only those from the last 

 plat, or the one receiving the greatest amount of kainit were used, as 

 the results here seemed sufficiently conclusive. The ground at the 



