294 Fiftieth Report ox the State Museum 



ings of the same by Mr. J- Ci. Jack, from Cambridge, in 1887 and 1888. 

 In the autumn of 1888, it was discovered in several localities in the City 

 of Washington. Tlie following year a more complete series of its stages 

 having been obtained from Mr. Jack, it was identified at the Department 

 with the European Gossyparia ubni. In July of the previous year (1888) 

 it had been received by me from Marlboro and Albany, N. Y., and 

 observed by Professor Perkins at Burlington, Vermont. It was also 

 detected about this date in New York City by Mr. Henry Edwards, and 

 in i8go it was sent to Washington from Brighton, Mass. -Some young 

 trees at Palo Alto, California, were seriously affected by this insect in 

 1893. The next year it occurcd abundantly at Ghent, N. Y. In 1895, 

 Prof. G. C. Davis found it numerous on the elms of the Michigan Agri- 

 cultural College, and badly infested trees were reported by Prof. F. H. 

 Hillman at Carson City, Nevada. About this time it made its appear- 

 ance at Amherst and Brookline, Mass. The present year it was re- 

 ceived by me from Catskill, and observation has shown it to be quite 

 largely distributed in the vicinity of Albany and Troy in this state. 



Its Distribution. 



It will be seen from the above that this insect is now known to occur 

 in six States in the Union besides the District of Columbia. In Massa- 

 chusetts it appears to be extensively distributed over the state, as published 

 in a recent notice of the insect by Mr. Kirkland. It is quite probable 

 that it has already been introduced in the adjoining states of Rhode 

 Island and Connecticut. From the occurrence of the pest at Burlington, 

 Vt., there is little doubt but that it will soon invade New Hampshire and 

 Maine, if it has not already done so. It is known to occur in several 

 localities along the Hudson river valley from the City of New York to 

 Troy. In the upper portion of this district, the insect has been found so 

 abundant and generally distributed that the same condition will probably 

 soon be reported for the lower Hudson. 



The other recorded occurrences of this insect indicate a wide distribu- 

 tion for it in the future, — ranging from the Atlantic to the Pacific and, 

 at least, from about the latitude of Washington, D. C, to near the 

 Canadian border. 



Injuries by this Pest. 



It is impossible to estimate even approximately the damage caused by 

 this insect in its eastern distribution, associated as it largely is with the 

 destructive elm-leaf beetle. 



