107 
Psyllidae of New Zealand — Tuthill 
Fig. 17. Trioza alseuosmiae n. sp. Lateral aspect of 
male cauda; b, lateral aspect of female cauda. 
valve long, almost equaling dorsal, apical 
two fifths sharply upturned, scoop-shaped. 
HOLOTYPE, male, allotype, female, several 
male and female paratypes, Mamaku Hills, 
near Rotorua, December 5. One male, Mama- 
ku Gorge, December 6. Last-stadium nymphs, 
Mamaku Hills, September 26. All specimens 
taken from Alseuosmia. 
HOST PLANT: Alseuosmia macrophylla A. 
Cunn. 
The nymphs, which were taken from the 
host in early spring, when it was just begin- 
ning to bloom, were in pits on the leaves. At 
that time no adults were present. Upon re- 
turning to the same plants in December, 
adults were found. No specimens could be 
captured a short distance away in a portion 
of the same bush which had been cut over so 
that the sun had been let in, although the 
Alseuosmia was very abundant and in a thriv- 
ing condition. All the specimens taken were 
in dense bush where the sunlight does not 
penetrate. It would seem that the ecological 
requirements of this species limit it to the host 
plant growing as underbrush in dense bush. 
Trioza acuta (Ferris and Klyver) 
1932 Powellia acuta Ferris and Klyver, New 
Zeal. Inst., Trans. 63: 38, 39> 43, pi. 10. 
The only collection made of this species 
was October 29, at which time it was taken 
in large numbers from its host plant, Cassinia 
leptophylla R. Br., on a ridge above Croisilles 
(or Croixelles). A large percentage of those 
taken were copulating at that time. 
This is a small but robust species. It ranges 
in length from 2.0 to 2.25 mm. 
Trioza parvipennis n. sp. 
Fig. 18 
Length to tip of folded wings 2.75- 
3.75 mm. 
color: General color cinereous to straw 
color, abdomen darker dorsally. Wings some- 
what fumate. Some specimens mostly green. 
STRUCTURE: Body robust, finely pubescent, 
surface rugulose. Head large, wider than 
mesoscutum, scarcely deflexed. Vertex broad 
with strong discal impressions, bulging an- 
teriorly. Genal processes large, conical, blunt, 
0.75 as long as vertex. Antennae slightly 
longer than width of head. Eyes large. 
Thorax quite fiat for genus. Pronotum wide, 
not depressed below plane of vertex. Fore- 
wings small, narrowed in apical third, rounded 
apically, 2.5 times as long as wide, membrane 
rugose, semitransparent, thickly set with 
points except along veins, points especially 
large near margin of wing between Rs and 
Ml, in some specimens similar to the alar 
radulae, veins setate; Rs long, somewhat 
sinuate, marginal cells very small, approxi- 
mately equal. Hind wings 0.75 as long as 
