136 , NEW YORK STATE MUSEUM 



only a short distance away, and the temperature during the pre- 

 ceding two days had been quite cold. 



Wooly beech aphis (Phyllaphis fagi Linn.) . This in- 

 sect has been unusually numerous on purple beech foliage in 

 Washington park, where it was found in very large numbers, 

 July 4. Its depredations on the same tree in Westchester county 

 have also been brought to our attention. 



Birch aphis (CaUipterus betulaecolens Mon.). 

 This little species is particularly injurious to the cut-leaved 

 birch, and is occasionally very abundant. It was reported as 

 being quite destructive at Newport, Herkimer co., by Mr George 

 S. Graves, and evidences of its work were found by Mr Young 

 at Poughkeepsie in the middle of July. The latter trees showed 

 very plainly that the insect had been exceedingly abundant, since 

 the foliage was badly discolored and well smeared with honey- 

 dew. We also observed the work of this insect in the vicinity 

 of Albany, and specimens of very badly infested twigs were sub- 

 mitted for examination by Mr E. P. Van Ness of East Green- 

 bush. In this instance, as in the preceding, the attack was a 

 very severe one and the tree had undoubtedly suffered greatly 

 throughout July, if not earlier in the season. Some of the leaves 

 bore a number of pupae of the two spotted ladybug, A d a 1 i a 

 bipunctata Linn., which had evidently fed on the plant lice, 

 and reduced their numbers very largely. 



Pemphigus popularius Fitch. This species is rarely brought to 

 notice, though a few infested leaves of the balm of Gilead, 

 Populus balsam! ferns, were received from Lake Clear 

 Junction through Mr C. R. Pettis. The leaves were drawn together 

 and had much waxy matter on their surfaces, giving them the 

 appearance of having been coated with a whitish powder. In 

 some instances the insects formed a series of pseudogalls on the 

 upper side of the leaves. The cavity produced by drawing the 

 leaf together contained numerous winged plant lice, a few nymphs 

 and many cast skins. Mr Pettis states that all the trees in the 

 vicinity were affected by this species. Another poplar-infesting 

 species, Chaitophorus populicola Thos., was met with 

 in considerable numbers on the common aspen at Karner, July 24. 



