162 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 12 



the country through their ports of entry. If we are going to get ade- 

 quate means, the whole country must get under the burden and help, 

 otherwise these few states will get weary of the load and leave it to 

 those states which are most interested, but which won't realize what 

 they must do to stay the invasion, until it is too late. 



Mr. C. p. Gillette: We speak quite often about insect exter- 

 mination. I would like to have the members of this body give us a list 

 of the insect pests we have exterminated in this country. 



President E. D. Ball: We have exterminated the gipsy moth 

 in half a dozen places; wherever they have tried, since they really took 

 hold of it. 



Mr. J. G. Sanders: The pink bollworm is well under way. 



President E. D. Ball: The potato bug has been exterminated 

 in some countries we know. 



Mr. W. D. Pierce: The cattle tick has been exterminated in 

 whole states. 



President E. D. Ball: The scabies is practically eradicated 

 from the western range. 



The next paper is on "Control of the Chrysanthemum Gall Midge 

 with Nicotine Sulphate — with Notes on Life-Cycle," by T. L. Guyton. 



NICOTINE SULFATE SOLUTION AS A CONTROL FOR THE 



CHRYSANTHEMUM GALL MIDGE, DIARTHRONOMYIA 



HYPOGAEA H. LW. 



B}- T. L. GxjYTON, Harrisburg, Pa. 



A brief study of Diarthronomyia hypogcea was made at the Ohio 

 Agricultural Experiment Station under the direction of Prof. H. A. 

 Gossard. The writer is indebted to Professor Gossard and Mr. J. S. 

 Houser for helpful suggestions in applying control measures. 



Diarthronomyia hypogan, a European pest for many years, was first 

 recorded in this country in 1915 by Dr. E. P. Felt from specimens taken 

 from greenhouses in Michigan. Professor Essig of California reported 

 its presence in that state in 1915 and 1916. The first known outbreak 

 in Ohio greenhouses was in February, 1918. 



Life-History as Noted in Greenhouse 

 This study extended from the last of February to first of May, and 

 one complete brood was observed. The length of the life-cycle is from 

 forty to fifty days in a greenhouse where the temperature was about 

 70° F. The eggs are placed promiscuously about the young, growing 

 part of the host plant, and the number deposited by each female is from 

 80 to 150. 



