192 THE CANADIAN ENTOMOLOGIST 



place of fruit if more convenient. There seems to be no notice- 

 able difference in baits wiiere molasses was used and where it was 

 left out, and conversely approximately equal effectiveness was 

 obtained where the fruit or extract was left out of the bait. We 

 had only two experiments using banana in place of the citrus 

 fruits, and the results were very satisfactory and warrant further 

 trials in the field. 



Tests of different formulae to determine the attractiveness of 

 different baits can hardly be considered satisfactory or reliable 

 when conducted in a small pan such as we used, but it is believed 

 that they indicate certain possibilities which should be tested in 

 the field to determine their practical application. This summary 

 is given for the benefit of others who may be planning work along 

 this line the coming season. 



"The crude arsenous oxid referred to above contains 85 to 

 92 per cent, arsenous oxid (AS2O3), the sample used in our experi- 

 ment containing 88 per cent., according to the analysis furnished 

 by the U.S. Insecticide Board. It is obtainable from the Anaconda 

 Copper Mining Company, Anaconda, Montana, through the 

 sales agents, The United Metals Selling Co., 42 Broadway, N.Y., 

 at l}/2 cents per pound, but only in barrel lots of 400 to 500 pounds." 



NOCTUID NOTES. 



BY WM. BARNES, M.D. AND J. MCDUNNOUGH, PH. D., DECATUR, ILL. 



We have read with great interest Mr. WoUey Dod's able 

 criticism of the arrangement of species in our recent Check List 

 (1918, Can. Ent., L, pp. 8-16 and 43-51). We have long regarded 

 Mr. Dod as one of the most careful students of Noctuidae in America 

 and believe that, in most instances, the shifting of species advo- 

 cated by him will be found to be correct. In tHe preparation of 

 our Check List we found it impossible thoroughly to revise each 

 Noctuid genus, as the work ixivolved would have necessitated the 

 postponement of the list for at least several more years; we, there- 

 fore, with certain minor limitations, followed the order of species 

 as given in Hampson's Catalogue of the Lepidoptera Phalaense of 

 the British Museum, although fairly certain that an intensive 

 study of the structural details of this ^.oup-'and especially of the 



June, 19 IS 



