﻿ON SOME NEW SPECIES OF LEAF-HOPPER 

 (PERKINSIELLA) ON SUGAR CANE. 



Perkinsiklla Kirkakly. 



This genus was erected by Kirkakly for saccliaricichi in VJ03. 

 It differs from Dicranotropis in the first joint of antennae being 

 l)roader at the apex than at the base and both joints somewhat 

 flattened, not cyhndricak akso in the presence of two spines on 

 ventral margin of pygophor. The genus is particularly attached 

 to sugar cane (Sacchaniiii ofpciiiantiii), only occasionally going 

 on to other grasses. The thirteen known species are distributed in 

 the following manner : — 



New Guinea 6, Amboina 3, Ceram 1, Java 4, Borneo 3. Aus- 

 tralia 2. Fiji 2, Hawaiian Islands 1 (introduced), China 1. 



From this it appears that it is a Malayan genus with its center 

 in New Guinea. Considering the amount of sugar cane taken 

 from island to island in native boats, it is surprising that some of 

 these species have such a restricted range. 



The males are best distinguished by the genitalia, otherwise the 

 species may be separated as follows : 



1. Frons concolorous. 2 

 Frons darker between eyes than below. 5 



2. Vertex, pronotum, and scutellum lighter than 



frons and clypeus. ftiscifruiis 



\'ertex, pronotum, and scutelhuu not lighter 

 than frons and clypeus. 3 



3. X'eins on tegmina apparently white, sparsely 



granulated. •zvsfafrix 



^'eins on tegmina apparently dark, closely gran- 

 ulated. 4 



4. Median, radial, and cul)ital cells clear ; longi- 



tudinal markings on femora ver}' faint. aiiiboiiicnsis 



Median, radial, and cubital cells dark ; longi- 

 tudinal markings on femora plainer. lalokcnsis 



