30 



REMEDIES. 



As this insect secures its food by sucking the sap from the tender 

 twigs and leaves., it follows that an arsenical poison will not injure them, 

 but they are amenable to treatment with contact insecticides, among which 

 the kerosene emulsion is perhaps the best. Many times, on small trees 

 where only a few of the smaller branches are infested, they may be cut 

 away and burned during the winter, thus destroying the eggs. 



BIBLIOGRAPHY. 



1876, Glover, Kept. U. S. Commr. Agri., pp. 28-29. 



1882, Lintner, 1st Rept. N. Y. State Ent., p. 281. 



1890, Packard, 5th Rept. U. S. Ent. Comm., p. 512. 



1892, Coding, Insect Life, 5:92. 



1893, Hopkins, Bui. 32, W. Va. Agri. Exp. Sta., p. 230, No. 432. 



The following insects have also been reported as feeding on the black 

 locust. The name of each species is followed by a short note, in which 

 is given the part of the tree affected and the authorities for the statements. 



It is a principle well known among economic entomologists that the 

 growing of single species of trees or plants, in large blocks, often results 

 in a rapid increase in numbers of its insect enemies. This is well illus- 

 . trated by Prof. L. Bruner (Bui. 14 and 4th Ann. Rept. Neb. Agri. Exp. 

 Sta.), who reports several insects as destructive to the black locust on 

 tree-claims in Nebraska. Many of these are quite common in Ohio, but 

 have not been reported as feeding upon this tree. 



Observations made in black locust plantations in Ohio show that 

 several insects, usually considered of little economic importance, have 

 caused serious injury. 



ORDER ORTHOPTERA. 



Family Gryllidae. 



Oecanthus niveus Harr. The Snowy Tree Cricket. This is a very 

 common insect in Ohio, and feeds almost entirely upon tender annual 

 plants. The greatest injury, however, is caused by the habit of the 

 female in depositing, her eggs in a row in the small twigs of trees, and 

 especially in the canes of raspberry plants. This weakens the twigs and 

 causes them to break down. 



1889, Bruner, Ann. Rept. Neb. State Hort. Soc, pp. 227-231. 



1890, Bruner, 4th Rept. and. Bui. 14, Neb. Agri. Exp. Sta., pp 

 119-126. 



