82 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 9 



and that the second cutting will take off many of the second brood. 

 Fall pasturage will destroy many of the third brood. The present 

 well-established customs for harvesting and pasturing clover furnish 

 a logical and effective program of control. 



President Glenn W. Herrick: The next paper is by Mr. J. S. 

 Houser. 



DASYNEURA ULMEA FELT— A NEW ELM PEST 



Bj' J. S. Houser 



Reference to this insect in entomological literature has been made but 

 three times previous to the present. In 1907 and 1911, Dr. Felt 

 merely referred to it and in 1913 he described the adult form. In the 

 latter article, immediately preceding the technical description. Dr. 

 Felt states: 



This dark brown species was reared May 7, 1888, from aborted elm buds evidently- 

 taken in the vicinity of Washington, D. C, presumably by Mr. Pergande. Appar- 

 ently the same gall was collected at Jamaica Plain, Mass., by J. G. Jack. 



So far as the writer has been able to determine, the above constitutes 

 the complete recorded distribution of the insect to date. It was 

 found first in Ohio, September 21, 1914, infesting an elm used as a 

 street tree, Oakland Ave., Dayton, O.; later in 1914 and in 1915 it was 

 observed in a nmnber of places in Cincinnati, O.; July 25, 1915, a 

 small elm was observed at New Matamoras on the Ohio River; and 

 July 27, 1915, an additional small elm, at Mineral, O., was observed 

 to be infested. Adults bred April 28, 1915, from Dayton material, 

 were sent to Dr. Felt who very kindly identified them. Adults have 

 not been bred from galls taken at other places, identification having 

 been based upon the very characteristic gall only. It may be of 

 interest to note in passing that the writer has been able to secure 

 adults only when infested twigs were collected just at the time the 

 foliage was starting to expand. It seems it is true with this, as with 

 some other members of the family having similar habits, that the 

 expanding of the foliage is essential to the emergence of the adults. 



The injury inflicted bj^ the species is the formation of from one to 

 twenty aborted bud galls, usually at the twig tips, resulting in the 

 checking of branch development, and ultimately in the stunting and 

 malformation of the tree. In some of the most severe cases observed, 

 70 per cent or more of the branches were affected ; in other instances 



