APHIDID.E. 2 73 



It is apt to be confounded with Melanoxantlms i<alicis, one of the 

 most salient points of difference being the joints of the antennae. 



The other species described by Buckton in his Monograph are 

 L. i>kc(M, which is said to be very abundant on silver fir and also 

 on spruce near London ; L. imiicolu^, on larch and Scots pine ; and 

 L. inacrocephalus, on spruce. 



Genus Phyllaphis. 



The following generic characters are from Buckton : — 



" Rostrum very short. 



" Head convex, smooth. 



"Antenna3 moderately long, the third joint about double the 

 length of the fourth ; the fifth and sixth joints equal, the sixth 

 furnished with a representative nail. 



" Cornicles hardly visible, and lying flat to thi; body. 



" Cauda almost obsolete. 



" Body furnished with 

 long flocks of wool-like fibre I \ 



of a waxy nature, 



"Wings long and broad. 

 Stigma long and trapezoidal. 

 Xervures not clouded. 



"Leus moderate in size." 



Phyllaphis fagi (Linn.) 



During early May the Fig. sss.-Pbyiiaphis fagi. 



leaves of beech -trees may 



be found covered with a white woolly coating, produced by insects 

 known as Phijllaplm fagi. In some cases large beech-trees are so 

 badly attacked as to be partially defoliated in midsummer, and this 

 being the growing season, the increment of the tree must be appreci- 

 ably affected. 



The apterous female is a light-green or yellowish colour. Tlie 

 general colour is, however, rather variable, as the abdomen is marked 

 with spots or bars. The cornicles are rather small, and tlie joints of 

 tlie antennae are about equal thickness throughout. 



The winged female (fig. 258) is best examined by first dissolving the 



