45 



These insects are able to live for several generations in thoroughly seas- 

 oned wood and tunnel it in all directions ; hence do a great deal of damage,. 



1893,- Hopkins, Bui. 32, W. Va. Agri. Exp. Sta., p. 189, No. 116 ; 

 also Nos. 368 and 375. 



1896, Webster, Bui. 68, Ohio Agri. Exp. Sta., pp. 47-48. 



1898, Hopkins, Proc. 19th Ann. Meet. Soc. Prom. Agri. Sci., pp. 

 103-108. 



Petalium bistriatum Say. Reared from black locust twigs. 



1890, Schwarz, Proc. Ent. Soc. Wash., 2:74. 



Synoxylon dinoderoides Horn. Reared from black locust twigs. 

 1890, Schwarz, Proc. Ent. Soc. Wash., 2:73. 



Family Scarabaeidae. 



Macrodactylus subspinosus Fabr. The Rose Chafer. The larvae- 

 of this beetle feed upon the roots of plants, emerging during June or 

 July. They are very difficult to control, as all of the adults do not appear 

 at the same time, making it necessary to apply treatment at frequent 

 intervals. Their favorite food plant is the rose, but they sometimes eat 

 the blossoms of the grape, destroying the whole crop. The beetles are- 

 fond of all sorts of cultivated fruits, and also feed upon the foliage of a- 

 large number of trees, among which is the black locust. 



1869, Walsh and Riley, Am. Ent., 1:160, 251. 



1870, Riley, Am. Ent. and Bot.; 2:341. 



1893, Hopkins, Bui. 32, W. Va. Agri. Exp. Sta., p. 191, No. 124. 



Euphoria inda Linn. (Syn. Cetonia.) The Bumble Flower 



Beetle. Adults appear in early spring. Feed upon the sap from black 



locust and other trees, also upon fruit and vegetables. Quite common. 



' 1862, Harris, Insects Injurious to Vegetation (3d Ed.), pp. 40-41. 



1868', Glover, Rept. U. S. Commr. Agri., p. 90. 



Lacnosterna sp. The Common White Grub. The larvae caused 

 considerable injury to black locust seedling in the nursery row near Troy, 

 Ohio, during 1905, the grubs cutting the tap root about one mch below 

 the siyf ace of the, ground. 



1905, Retords Div. N. and O. Insp.; Ohio Dept. Agri. 



Family Cerambycidae. 



Ecyrus- dasycerus Say. Reared from- black locust twigs. 

 1890, Schwarz, Proc. Ent. Soc. Wash., 2:74. 



Crytinus pygmaeus Hald. Reared from black locust twigs. 

 1890, Schwarz, Proc. Ent. Soc. Wash., 2:73. 



