single stick, the total number of leaf-hoppers that can, and some- 

 times do, emerge from a single stick and its crown of leaves is 

 almost incredible. 



The young when they hatch are of a sociable nature and gre- 

 garious and especially congregate at the base of the leaves, and 

 this habit is also largely retained by the adults, which often also 

 form large flocks in the seclusion of the youngest leaves of the 

 crown. 



It is in the immature stages while growth is proceeding that the 

 chief damage to the cane is done and the great excretion of 

 honey-dew takes place. 



It is not necessary to trace in detail the development of the in-^ 

 sect through its post-embryonic stages to the adult, since in this 

 j^oint it cscntially agrees with the several other island Dclphacids. 

 in which I have studied these points and presents no abnormal 

 features. 



The development of the tegiiiina and wings proceeds in the 

 ustial manner, by the outgrowth of lobes of the meso- and meta- 

 thorax. The fully-winged insect is capable of at least moderately 

 extensive flights, as is shown by the fact that it is attracted by the 

 lights of steamers at some distance from the land, and on land 

 to ligiits very far removed from its proper haunts. It is essen- 

 tially nocturnal in its activities and when disturbed in the day- 

 time flies but a short distance, or is even unwilling to fly at all, 

 trusting to its leaping powers to escape, or is content to sidle 

 round the leaf or stem out of sight, or to run backwards when 

 threatened from the front. 



The male, except for its rather smaller bulk, its darker abdo- 

 men, and dififerent sexual structures, is extremely like 

 the female. Copulation takes place at night. The adult hoppers, 

 most of which lie still or hidden by day, emerge in crowds from 

 their concealment at or shortly before dark. The female not 

 rarely lays eggs by day, but probably much more often by night. 

 When laying, the ovipositor is held at right angles to the ventral 

 surface, and its point of attachment just behind the posterior legs 



