ICERYA PURCHASI. 



73 



by three slightly raised, convex, transverse ridges, each 

 bearing a slight knob or elevation in the middle. The 

 fore edge of the insect is thickened and slightly scalloped, 

 and with a few ridges running from the edge to the 

 foremost ridge. Beneath it is furnished with three pairs 

 of legs, a pair of horns or antennae (see fig. 29), and a 

 sucker placed between the two foremost pairs of legs 

 {all black or pitchy). The antennae or horns did not 

 appear to me to be of more than ten joints, of the same 

 width throughout, excepting the lowest joint, which is 



SDB. 



AUSTBAIIAN BUG. 



FIG. 30. Egg mag., larvse mag. and nat. size ; back of one larva 

 showing cottony patches.* After figs, by S. D. Bairstow. 



somewhat wider than the others : it was not clear 

 whether the apparently long joint immediately succeeding 

 was of two joints, or of one slightly marked across in 

 the centre ; but as the specimens examined had been 



* Accompanying Mr. Bairstow's sketches of the larva were notes of 

 his daily, or almost daily, observations of the early history of the " Bug " 

 from hatching onwards, during a period of two months, extending 

 from the latter part of January to the end of March, the main points 

 of which I have already published in my pamphlet on Icerya purcliasi. 



