I 76 NEW YORK STATE MUSEUM 



louse, it was doubtless partly responsible for their poor condition. Many 



infested maples were seen at this time at Batavia, but the injury was not 



as great as at Syracuse. The work of this species was also observed at 



Amsterdam and in Albany, and it doubtless caused serious injury in the 



latter places. A few syrphid larvae were found on the infested trees. 



Description. This is a small species, the winged adult measuring only 

 about ^10 inch in length. The antennae are about twice the length of the 

 body and nearly colorless, except for the black tips of each segment. The 

 eyes are a brilliant red, and the dorsum is a variable brown, as is also true 

 of the thorax. The wing veins are heavily fringed with dark brown near 

 the tips. The dorsum of the middle abdominal segment is also marked 

 with dark brown, and that of the anterior and of the terminal segments is 

 frequently a grayish white. The long slender legs are nearly colorless. 

 The last thoracic segment and the second and third abdominal segments 

 bear paired black spines, one on each side of the median line, the middle 

 spines or tubercles being the highest. This species is somewhat peculiar in 

 that old adults may have the greater part of the abdomen broken off with- 

 out apparently suffering much inconvenience. The wingless individuals 

 are a pale yellowish green color, the eyes are a bright red, and the tapering 

 antennae are dark at the tips. The honey tubes are short |and capitate in 

 nearly full grown individuals. The middle tibia, tarsi, and the base of the 

 posterior tibiae are frequently dark. [Sec pi. 11, fig. 1-4] • 



Elm leaf aphid 



Calliptcriis n/iii/'/olii Alonell 



A very slight, inconspicuous plant louse frequently occurs on the underside of the 

 leaves of American elms during midsummer. 



This delicate species was present on American elms in Albany in great 

 numbers in 1897. It caused considerable injury at that time and its work 

 was plainly indicated by the constant datnpening of sidewalks with large 

 amounts of honeydew falling from the infested trees. The attack of that 

 year continued throughout July and August, when it was finally arrested 

 by heavy rains in conjunction with the efficient work of ladybugs and their 

 young. This species is one which is widely distributed throughout the 

 State and frequently causes considerable injury, though active measures for 

 its control will as a rule be avoided, largely on account of the attendant 

 expense. 



