1004 EXPERIMENT STATION RECORD. 



seem to be attacked in preference, although various shade and orna- 

 mental trees are also infested. The eggs are laid in September by the 

 female burrowing under the bark of the trunk and larger branches, 

 forming little channels where the larvae feed and hibernate, emerging 

 as adults in early spring. There is a second brood in the summer. 

 The insect was discovered attacking both healthy and diseased trees. 



It was found that spraying the trunks and branches with kerosene 

 emulsion, as well as with a combination of Bordeaux mixture and Paris 

 green, prevented the attacks of the beetle over the portion sprayed. 

 Spraying with either of these remedies is therefore recommended, the 

 application preferably to be made before any marks of attacks by the 

 insects are found on the trees. Where trees are severely infested cut- 

 ting them down and burning them through the winter is advised. 



A plum scale in western New York, M. V. Slingerland {Kew 

 York Cornell Sta. Bid. 83^ pp. 681-699, pi. l,Jigs. 4). — This contains the 

 results of investigations on a supposedly new species of scale insect 

 belonging to the genus Lecanium, which has suddenly developed in 

 alarming prevalence in the plum orchards of the State. Notes are 

 given on the appearance of the pest, its life history, damage, enemies, 

 and the most advantageous remedies. The minute, brown, spindle- 

 shaped young scales that have survived the winter on the branches 

 begin to move about April 1, soon locating themselves i)ermanently, 

 increasing rapidly in size, and becoming adult in about 2 months. The 

 adult females are dark brown and almost hemispherical, resembling 

 small brown split peas adhering to the branches, on which white scars 

 are left on the removal of the scales. The males are smaller, flat, elon- 

 gate, and whitish. Several hundred eggs are laid by each female in 

 June, hatching in about a month, and the young migrate in August 

 and September to the spots where they hibernate. There is but one 

 annual brood. 



The damage done by the scales is chiefly confined to plums, although 

 other trees are attacked when adjacent to infested plum trees. The 

 Japanese varieties of plums are apparently exempt from attack. 



The twice-stabbed ladybird {Chilocorus bivulneriis) feeds upon the 

 scale, both in its larval and adult state, and it is thought that there 

 are also hymenopterous parasites. 



Spraying with strong kerosene emulsion about July 1, when the newly 

 hatched scales are detected moving about on the branches, is urged, 

 the application to be repeated during the winter and again in the early 

 spring. 



A plate is given illustrating the San Jos6 scale for comparison with 

 the plum scale. 



Observations on insects— season of 1894, H. Osborn and C. W. 

 Mally {loica Sta. Bui. 27, pp. 135-149). — This bulletin comprises notes 

 on the chinch bug, western onion thrips, squash borer, and melon 



