56 

 NOTE ON A COTTON OUT-WORM. 



BY G. F. ATKINSON, AUBURN, ALA. 



[Secretary's abstract.] 



During the early part of July the author visited Greensboro, Ala., at the request 

 of a cotton planter who complained that great damage was being done to the young 

 cotton by worms. He found that an acre had been entirely stripped and bad been 

 plowed under and replanted. He found Noctuid larvae at the roots of 20 or 30 of the 

 plants, which he subsequently reared to the adult stage and proved to be Agrotis annexa. 

 Experiments with Paris green seemed to show that this insect could be treated with this 

 substance. He also found the larva) feeding on Amarantus. 



NOTE ON A NEMATODE LEAF DISEASE. 



BY G. F. ATKINSON, AUBURN, ALA. 



[Secretary's abstract.] 



This worm has been found by Dr. Byron D. Halstead affecting the leaves of 

 Chrysanthemum and CoUus in New Jersey. It makes no swelling or deformity as do 

 many other Anguillulids, but causes a brown patch upon leaves. Mr. Atkinson has 

 determined this as a species of the genus Aphelenchus. He entered into some details as 

 to the distinguishing characteristics between Aphelenchus and Tylenchus, and showed 

 that this species is somewhat aberrant in the genus in which he has placed it. 



Mr. Smith asked whether the characters of the genitalia are constant. 



Mr. Atkinson replied that they are within generic limits, but that they do not 



differ with species except as regards the distance trom the anal end of the body to the 



genitalia. Mr. Atkinson further stated that he thinks that these Nematodes reach the 

 leaves by being borne up in the axils of the leaves as the plants grow. 



Mr. Riley asked whether it was not possible that the young might work their way 

 up the plants to the leaves during rain. 



Mr. Atkinson agreed as to the possibility of this method, and further stated that he 

 had received what he supposed to be the Tylenchus tritici or scatidens of Europe, from 

 grass in Colorado. 



KEROSENE EMULSION AND PYRETHRUM. 



BY C. V. RILEY, WASHINGTON, D. C. 



In the Eural New Yorker of June 20th, 1891, Dr. Albert E. Meuke, director of 

 the Arkansas Experiment Station, criticises a review of Bulletin No. 15 of his station, 

 published in Insect Life. The principal point raised by Dr. Menke is that kerosene 

 extract of pyrethrum, made into an emulsion with soap and water, is entirely different 

 from an aqueous extract of pyrethrum made into an emulsion with soap and kerosene, as 

 recommended by Professor Gillette. He also disputes the statement that the idea of 

 combining kerosene and pyrethrum was given him by Prof. Jerome McNeill. 

 Prof. McNeill has experimented with both the Gillette and the Menke combinations, 

 and in a recent communication he confirms the statement that he first suggested the 

 combination of these two substances to Dr. Menke and gives the results of his experience 

 as follows : 



In preparing, in accordance with your directions, Dr. Menke's mixture, I used the 

 proportions given in Bulletin No. 15 of the Arkansas Station, The extract of 



