REPORT OF THE ENTOMOLOGIST. 



To the Director of the Cor7iell University Agricultural Experiment 

 Station : 



Sir : 



In compliance with your request I beg leave to submit the fol- 

 io wnig report of the work of this division during the year just 

 closed. 



The year has been a very successful one ; certain experiments 

 have been brought to a satisfactory conclusion ; and others recent- 

 ly started, promise to give important results. 



The study of Cephtis pyginaetcs, a saw-fly borer in wheat, has 

 been nearly completed, and a Bulletin, (No. XI), has been pub- 

 lished giving the results obtained. In this Bulletin the complete 

 life-history of the species is described in detail, and practical con- 

 clusions are drawn from the results obtained. Further observa- 

 tions are desirable in order to determine in what other plants the 

 insects can live. It is my purpose to make these observations 

 during the coming summer. 



The study of the Clematis disease is well advanced ; and a pre- 

 liminary report on it was presented to the Western New York 

 Horticultural Society at their recent meeting, as it was from mem- 

 bers of this society that the diseased plants were received. I have 

 definitely determined that the cause of the disease is a Nematode 

 worm belong to the family Anguillulidae, as suggested in my re- 

 port of last year. The species is Heterodera radicicola. This 

 worm has attracted much attention in various parts of the country 

 during the past year, as it has been found to infest a great variety 

 of plants, and to do much injury. Much material including a full 

 account of the life-history of the pest, with figures of its different 

 stages, is at hand ; and I purpose to submit a Bulletin upon it at 

 an early date. These studies have been carried on in the Insect- 

 ary. I wish now to conduct a series of experiments in the field 

 for the purpose of determining the best method of combatting this 

 pest. Should there be funds available for this purpose, I recom- 



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