184 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 3 



appearance as a serious greenhouse pest, attacking stock and sweet 

 alyssum. 



Another unusual greenhouse insect, which has recently appeared, 

 is the garden flea-hopper {Ilalticus uhleri Giard). It attacks smilax, 

 the only greenhouse plant found to be appreciably damaged. 



An interesting cercopid {Philcenus spumarius'^) was found very 

 abundant on greenhouse rose stock which had recently been imported 

 from Europe. Inasmuch as this species had never been noticed before 

 by us, it is probable that it was imported with the stock. The white 

 frothy masses produced by the nymphs were very conspicuous on the 

 immature rose buds and in the crotches of the more tender branches. 



Insects Injuring Shade Trees and Ornamental Shrubs 



The bronze birch-borer {Agrilus anxius Gory) is found throughout 

 the parks of Chicago, and is doing much damage to the birch trees. 

 It has also been especially destructive in several of the nurseries. 



The imported poplar and willow curculio {Cryptorhynchiis lapathi 

 L.) was first found, several years ago, in the south part of the city. 

 We now have records of the occurrence of this insect in all parts of 

 the city and in several nearby nurseries, where it has been introduced 

 on stock from nurseries in the east. It is a serious pest at present — 

 the most destructive of the many poplar insects — and is continually 

 spreading. 



What is supposed to be the linden borer {Saperda vestita Say) was 

 found this fall doing much damage in one of the large cemeteries. 

 Only the European lindens were attacked, but all of these, both the 

 permanent plantings and the nursery stock, were dying or dead from 

 its work. Adults have not yet been bred and the identity of the 

 species is uncertain. 



The comus borer {Oherea tripunctata Fab.) is found infesting 

 much of the dogwood plantings in the park systems. From a large 

 number of larvjB examined last spring 44 per cent were found para- 

 sitized with an ichneumonid. 



Ranking in importance with the birch and poplar borers is an un- 

 determined ninebark sesiid borer- which has proven to be an important 

 pest of ninebark, Physocarpus opuli-folius, this shrub being one 

 which is commonly planted in the Chicago parks. The borer usually 



^Determined by Mr. C. A. Hart. 



" Since writing tlie above Mr. C. A. Hart has determined those bred from 

 ninebark and Cornus as Sesia scitula Harr. and those from Viburnum as 

 Sesia pictipes G. and R. 



