Psyllidae of New Zealand ~ Tuthill 
COLOR: General color of head and thorax 
tan with dark brown markings. Abdomen 
dark brown. Wings hyaline. 
STRUCTURE: Body surface finely punctate, 
with moderate pubescence, more or less 
dusted with powdery wax. Head wider than 
mesoscutum. Vertex strongly impressed disc- 
ally, slightly produced anteriorly. Genal pro- 
cesses large, conical, acute, divergent, 0.66 
as long as vertex. Eyes large, hemispherical. 
Postocular areas large. Antennae slightly less 
than twice as long as width of head. Prono- 
tum depressed slightly below plane of vertex. 
Forewings rounded apically, 2.66 times as 
long as wide, membrane with points in small 
area at base and along claval suture; veins 
prominently setate, Rs of moderate length, 
slightly sinuate, marginal cells nearly equal. 
Hind wings with prominent points on mem- 
brane, venation unusually distinct. Metatibiae 
with serrate basal carina, 1 outer and 3 inner 
apical spines. 
Male proctiger short, broadly produced 
Fig. 10. Trioza discariae n. sp. a, Lateral aspect of 
female cauda; b, lateral aspect of male cauda; c, dorsal 
aspect of tip of clasper. 
TH 
99 
caudad. Forceps shorter than proctiger; in 
lateral view broad with two broad lobes on 
anterior margin, lower one arising from mesal 
surface, blunt, black tooth apically; in caudal 
view stout, with large, sharp, black tooth near 
apex on inner margin; in dorsal view with two 
large, sharp, black teeth projecting inward, 
anterior one somewhat below other, inner 
surface with many long setae. Female genital 
segment short, dorsal valve excavate below 
anus, downcurved to blunt apex; ventral 
valve shorter than dorsal, sharp. 
HOLOTYPE, male, allotype, female, numer- 
ous male and female paratypes, Halley’s Lake, 
Cobb River Valley, January 8, from Discaria 
toumatou; Crown Range and near Kingston, 
January 22, many adults and nymphs from 
Discaria toumatou; adults from Discaria tou- 
matou, Skipper’s Bridge, December 7, 1950, 
E. S. Gourlay. 
HOST PLANT: Discaria toumatou Raoul. 
This is a very common and abundant 
species on its host and almost certainly is the 
form which Maskell lumped with vitreoradi- 
ata. His drawing of the male forceps which 
Ferris and Klyver explained away as being an 
illusion is actually only an exaggeration of 
the structure of the inner face of the forceps 
of this species seen from the proper angle. 
Trioza emarginata (Ferris and Klyver) 
1932 Powellia emarginata Ferris and Klyver, 
New Zeal. Inst., Trans. 63: 39, 42, pis, 8, 9- 
Length to tip of folded wings 3.5 mm. 
(male) . 
Only one specimen of this distinct species 
was taken. This one individual was taken from 
a mixture of shrubs {Pittosporum, Nothopanax, 
Hebe salicifolia, etc.) forming the edge of a 
tongue of Nothofagus bush at the start of the 
path to Tawhai Falls, Tongariro National 
Park, November 26, 1950. It was taken while 
I was collecting specimens of Trioza hehicola 
on the Hebe. It is quite close to T. vitreoradiata 
as indicated by Ferris and Klyver. This, the 
sixth specimen known to have been captured. 
