could be decided, it was only on receipt of Mr. Clark's specimens 

 that this was finally settled. 



GIiNKR.\L ACCOUNT OF IIAPJTS OF TIIF LEAF-HOPl'ER. 



3. It is not necessary to describe at great length the habits of 

 the leaf-hopper, since they must now be familiar to most of those 

 concerned,' and at one time or another I have already fully re- 

 ported upon these. The following summary may, however, be 

 given. The eggs are laid in a chamber formed by the ovipositor 

 of the female in the tissues of the leaf or in the stem of the 

 cane. The number of eggs contained in one of these chambers 

 varies considerably. Lately in Hamakua district I carefully opened 

 up some hundreds of these chambers and found the number of 

 eggs in each to be from one to twelve in number. That end of 

 the egg which is nearest the external surface is the head end of the 

 future leaf-hopper and the red pigment spots, which form the 

 eyes of the newly-emerged insect, are conspicuous at some dis- 

 tance behind the narrow apical extremity of the egg before it 

 hatches. In the leaves the eggs are deposited on either surface 

 of the thicker parts, and being of elongate form, they usually 

 reach about half way through the tissues. The scar is always 

 visible and is often covered with a little whitish excretion. The 

 apex or head end of the eggs is generally just about level with 

 the surface of the leaf, but sometimes they even protrude a little 

 from the orifice of the chamber. The young emerge perpendicu- 

 larly, head first, sometimes two together from the chamber, and as 

 they emerge, the appendages at first apparently stuck to the body 

 become free, and the little insect is at once active, and may be 

 seen to perform peculiar sidling or retrograde movements similar 

 to those of older ones or of the adult. As a number of individ- 

 uals generally hatch from a single chamber, and as the cham- 

 bers are extremely numerous in a single leaf, verv many being 

 sometimes present in a square inch of surface, and as also in 

 stripped cane thousands of these chambers may be present in a 



