INSECTS AKllallM. I'AKK AND WOODLAND IKI-.KS 6o I 



Birch aphid 



Calliplcriis bclulaccolon Moii. 



A delicate yellowish jilant louse is soinetiines exceedingly al)iiiidant in midsiininuT 

 on the underside of birch foliage. 



1 his little si)cci(!S is soinctiiiK'S \t;r\' injurious to hirches in the \icinity 

 of .\lban\', ])arlicularl\- the ornamental cut-leaded \ari.el\', and it is occa- 

 sionally quite destructive in other portions of the State, complaints ot its 

 dei^redations ha\in!^ bei-n receixed from Herkimer county and also in the 

 \icinit\' of Huftalo. Thi-re is no method of keeping it m check aside trom 

 sprayinc^ with contact insecticides such as a whalc! oil soap solution or 

 kerosene emulsion and ordinarily that is impractical. The pest, when 

 abundant, is fed on to a considerable extent iiy adults and larvae of the 

 two-spotted lady beetle, A tl a 1 i a b i p u n c t a t a Linn. 



Woolly beech leaf aphis 

 Phyllaph is /aoi Linn. 



Cottony masses occurring on the underside of purple hee( h leaves usually shelter 

 grou])s of this plant louse. 



This species is a common one on piirpK: beech in jiarks, antl sometimes 

 becomes so abundant as to cover a large proportion of the under surface 

 of the leaves and at such timers it ma}' cause considerable injury to the tree. 



Description and habits. This aphid is shown clustered on the under- 

 side of leaves and alont.^ the mid ribs and smalhr veins on plate i i, tij^ures 

 lo, II. The adidt females may be recojjni/.ed by the conspicuous cotton)' 

 tufts larLjely concealinj^- the Ixnly. The \<)unL,r are paht g^reenish yellow and 

 may frequently be seen nestling among the hairs so abundant along the leaf 

 veins. The cast skins or exuviae are snow-white, sometimes abumlant and 

 may then give a whitish appearance to the undersiile of the foliage. The 

 partly grown plant louse has the habit of resting with its head close to a 

 vein, from which it is apparently drawing nourishment. The extremity of 

 the young is usually ornamented by a few scattering bluish, white fibers. 



