REPORT OP THE STATE ENTOMOLOGIST 1903 135 



damage appears to be inflicted in the latter part of June and 

 during July. 



Drepanosiphum acerifolii Thos. This delicate and really beauti- 

 ful species when examined under a magnifying glass, is capable 

 of causing considerable injury to various species of maple. Its 

 work on hard maple was observed by us last July at Nassau, 

 where it evidently caused considerable dropping of the foliage, 

 and the young were to be found here and there along the veins 

 on the underside of the leaves. Nearly full grown specimens are 

 remarkable for being incrusted with a whitish secretion which 

 nearly covers them. This species was met with by us in consider- 

 able numbers on maples at Saratoga, where it has likewise caused 

 some dropping of the leaves and injured the foliage to a con- 

 siderable extent. It was also reported by Mr George S. Graves, 

 as being on several varieties of maple at Newport, Herkimer 

 co., where it caused much dropping of foliage, and it was 

 observed by Mr Young in small numbers at Poughkeepsie. 



Box elder plant louse (Chaitophorus negundinis 

 Thos.). A number of specimens of what we believe to be this 

 species, was submitted for examination by Mr George S. Graves 

 of Newport, Herkimer co., who stated that it was exceedingly 

 abundant and destructive to box elder or ash-leafed maples in 

 that vicinity. The attack was first observed in early June and 

 continued till September, possibly later. It is probably the 

 same species which we observed at work in large numbers the 

 latter part of September on some box eldertrees at Nassau. 



Beechtree blight (Pemphigus imbricator Fitch). 

 This plant louse was exceedingly abundant on some beechtrees 

 at Newport N. Y. Our correspondent, Mr George S. Graves, sent 

 examples under date of Oct. 29, and from the appearance of the 

 twigs we judge that the insect was present in enormous numbers, 

 and had the attack been earlier in the season, it would un- 

 doubtedly have caused considerable injury. Mr Graves observed 

 the habit of this species of clustering on the underside of the 

 twigs, and adds that moderately cold weather does not seem 

 to affect them, since an inch of snow was seen on the hillside 



