298 FOREST ENTOMOLOGY. 



The apterous viviparous female is wholly black in general appear- 

 ance. Antennae not conspicuously long. The abdomen is of a 

 very shiny black colour. The cornicles are rather long. The eyes 

 are a darkish-brown colour. 



The winged viviparous female is wholly and conspicuously black, 

 with rather long antennae and broad wings. 



It is somewhat difficult to prescribe a remedy for this species. It has 

 been suggested to cut off the infested shoots or rosettes and destroy 

 the same, but as the leading shoot is the portion generally attacked, 

 this would obviously destroy the young tree, so that it would be better 

 to adopt some spraying measure, or otherwise shake the aphides into 

 a vessel containing paraffin. 



Genus Drepastosiphum. 



Eostrum short ; antennae very long, third joint longest ; seventh 

 joint very delicate ; cornicles large ; tail inconspicuous. Wings long 

 and narrow : cubital vein twice forked. 



; 



Drepaxosiphum platanoides (Schr.) 



This is a common aphis which lives on sycamore, and may be 

 found simultaneously with the appearance of the foliage. It simply 

 injures the plant by sucking the juices, and does not cause any mal- 

 formations. 



The eggs of this species may be found very plentifully on the bark 

 of sycamore during the winter months. They are black in colour, 

 and, when abundant, their glossy appearance on lichen and Protococcus 

 viridis renders them conspicuous to the naked eye at some distance. 



The larvae are found on the young leaves just as the latter are 

 bursting. When hatching they are of a bright-green colour, with 

 very long antennae and conspicuously red eyes. In general appear- 

 ance the body is so slender that the creature may be said to be all 

 "legs and arms." 



The pupal form, or stage between larva and winged insect, is very 

 variable both in colour and general appearance. 



The winged insects are also variable in colour, but the prevailing 

 hue is bright green. The head is rather flat, the eyes are very 

 prominent, and being of a golden-green colour, contrast very strongly 



