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(painted hickory borer), A 5 to 10 per cent, arsenical solution was 

 mixed with the water used in making the emulsion, but it is probable 

 that a more dilute solution could be used. The results were very 

 successful, the penetrating properties of the kerosene being fully 

 retained. Tests made on the mines of Goes in living wood showed 

 that by painting the holes where the boring dust is exuded, the mixture 

 quickly ascends through the frass and along the sides of the burrow, 

 killing the larvae in a few days. Similar results were obtained in 

 hickory-logs infested with C. picta. The mixture has not been tested 

 against borers in timber for buildings but will doubtless give good 

 results where the lumber is not exposed to severe weather conditions. 



1 



KJNiGHT (H. H.). Notes on Ichneumon laetus, BrulI6. — JL Econ. 

 Entom., Concord, viii, no. 6, December 1915, pp. 514-515, 1 plate. 



Males of Ichneumon laetus, Brulle, were reared during the summer of 

 1914 from the pupae of Cirphis {Leucania) unipuncta, Haworth. 

 Emergence began on 15th August and continued for a week. On 24th 

 August females of 7. funestus, Cresson, and I. canadensis, Cresson, 

 began to emerge. Pairing between a male of I. laetus and a female of 

 7. funestus was observed and breeding experiments showed that 

 7. canadensis and I. funestus are the females of 7. laetus, the last name 

 having the priority. Males were again collected during December in 

 decaying logs and hibernating females were found about 8 inches below 

 the surface of a gravel bank during March. 



Sell (R. A.). Some Notes on the Western Twelve-spotted and the 

 Western Striped Cucumber Beetles. — Jl. Econ. Entom, Concord, 

 viii, no. 6, December 1915, pp. 515-520. 



Diabrotica soror, Lee. (western twelve-spotted beetle or western 

 flower beetle), feeds upon a variety of plants, the choice depending 

 upon locality, season and stage in the life-history. In the vicinity 

 of Berkeley, California, it feeds on more than 500 varieties of plants 

 and is harmful to at least 100 of these. Injury to cultivated flowers 

 is very noticeable, since petals and essential organs are attacked. 

 A study of the feeding habits shows that the insect must become 

 adapted to a change of food. Twenty-five beetles which had been 

 eating beet-leaves were fed on potato tops. Two of these died, the 

 remainder becoming accustomed to the change in four days. Beet 

 leaves were then added, but the potato tops were preferred. When 

 the latter were removed, the insects fasted for one day and then 

 resumed the original food. Under certain conditions, this species 

 would eat some part of the flower or fruit of every plant upon which 

 it was observed. Occasionally a beetle was found in a colony of 

 Aphids. Field experiments with marked insects seemed to show that 

 there was a period of comparative rest, followed by one of great activity. 

 Each of these periods must have a definite relation to a stage in the 

 life-history. Celatoria diahroticae, Shim., a Tachinid enemy of 7). soror, 

 was not common near Berkeley. An unidentified spider killed a few 

 beetles. The birds observed feeding on the insects were the purple 

 finch J bush tit, linnet and canon wren. Before pairing, the females 



