242 



resLilt of llie woi'kiiit;' of Ihe génital styles as tlie sliglit etrusion 

 of colleterial lliiid, wliicli ilows ovei' tlie oggs and céments them, 

 is drawn ont and bi'okiMi oH' at the top, before a tVesh egg is 

 excluded. 



The ootheca is made as follows : the insect rests on tho leaf or 

 ])ark, back downwards, and the first egg is excluded pai'lly, the 



Fitr. 



Fig-. 5. 



base or lower end adhering to tlie bark; the apex of the abdomen is 

 then withdrawn, leaving the egg standing npright. The apex of the 



abdomen is now brought to the base 

 of this egg, and the next egg partly 

 excluded, and affixed to the bark, 

 and the apex of the abdomen slowly 

 drawn up (or away), sliding along 

 tlie side of the fii'st egg till it reaches 

 the top, when the génital styles are 

 opened and shut quickly a few times 

 as the colleterial Huid is eut or broken 

 oir, leaving the ragged fringe on the 

 outer cap of the egg (fig. 86). The 

 colleterial fluid is applied at the base 

 of an egg whilst being excluded, and 

 follows the ge.iilal styles up over the 

 op of Ihe egg. When an egg on the 

 oulside of tt.e ootheca is to be laid, 

 Ihe li[) of llie abdomen is Ijrouglit 

 l() the top uf the neai'est egg already 

 laid and colleterial tluid poured on 

 it; tlie tip of the abdomen is tiien 

 brought slowly down the side of the 

 egg to its base (briiigiug the colleterial lliiid down, adhering to the 

 génital styles) and then nioved a little way along the surface of the 



