INSECTS INJURING THE BLACK ALDER AND COFFEE TREE. 673 



(Psylla buxi Linn.), a species hitherto not known to occur in America. 

 It is of a pale-green color with hyaline wings, the anterior and middle 

 portions of the thorax (pronotum and dorsulum) having brownish, 

 longitudinal markings, the larva and pupa being of still paler, uniform, 

 greenish color, and not deviating in form from the larva; of other species 

 of the same genus. The winged insect bears a deceptive resemblance 

 to our native Hornbeam Psylla {Psylla carpini Fitch), and can only be 

 distinguished from this upon close examination, the most obvious dif- 

 ference being the absence of a distinct pterostigma in the Box Psylla. 



Mr. Angus attempted to brush the Psylla off with a stiff broom, but 

 this is a remedy of very quc.stionable value, and a much simpler and 

 doubtless more effective way of getting rid of this pest would be the 

 application of diluted kerosene emulsion in a very fine spray. 



There is no danger that this newly imported Psylla will infest any 

 other plant besides the box, but, if not kept in check, it is liable to 

 spread and to do serious damage to the plant in all those sections of 

 the country where it is grown and esteemed as an evergreen ornament. 

 (Report of Professor Riley for 1881, p. 410.) 



INSECTS INJURIOUS TO THE BLACK ALDER. 



Frinos verticillata. 



1. Ryperchiria io Fabr. (L. W. Goodell, Can. Ent., 1879, xi, p. 79.) 



KENTUCKY COFFEE TREE. 



Gymnocladus canadensis. 



This tree is perhaps as abundant in this part of Kentucky as any- 

 where else, but the only Lepidopteron that I have ever found feeding 

 on it is an undescribed Psylla, of which I have sent all my specimens 

 to Mr. C. V. Riley. (Chambers, in letter.) 

 5 ENT 43 



