INSECTS AFFECTING PARK AND WOODLAND TREES 595 



almost cylindric, of a delicate green color, pointed at the more deeply 

 buried end, and rounded and of a yellowish tint at the opposite extremity. 



Life history. "The life history of this insect is incompletely known. 

 The young were found by Dr Riley on the ioth of May at which time 

 after passing their first and third molts, on May 18 and June 5, they trans- 

 formed to perfect insects June 12. The young are described as being 

 without the hornlike projection of the thorax, and they appear to lack the 

 ability to hop which the adults possess, and from which they derive the 

 common name of treehoppers. The time of oviposition is not known, but it 

 is probably not prior to the middle of August in New York State, for on 

 the 8th of that month Dr Lintner observed the mature insects abundantly 

 on locust, when none of the egg coverings were observed. A corre- 

 spondent of Dr Lintner's records finding the egg covering in the early part 

 of September. We have found them in October and the insect undoubt- 

 edly winters in the egg. 



Food plants. This species occurs on a number of plants during the 

 latter part of the summer. It may be found on grape, red hoptree and 

 trefoil, the latter its favorite home. It has been recorded as occurring on 

 the leaves of the butternut and locust, and has been observed on wisteria. 



Distribution. This insect has an extensive range, having been recorded 

 by various writers from Canada, Massachusetts, New York, New Jersey, 

 Pennsylvania, Maryland, Illinois, Michigan, Iowa, Missouri and Texas. 



Bibliography 

 2882 Lintner, J. A. Ins. N. Y. 1st Rep't, p. 281-88 



Thelia acuminata Fabr. 

 This, one of the most grotesquely shaped of our tree 

 hoppers, is characterized by the enormous development 

 of the prothoracic horn, which extends nearly vertically 

 with a uniform diameter to a rounded tip y% inch above 

 the large prothorax. The insect is about ^ inch \x\ Y ^lZ Zir^\^Z^)' 

 length, yellowish, densely mottled with brown or dark brown, specially 



