108 
forewings, with points throughout. Meta- 
tibiae with serrate basal carina, 2 principal 
teeth, 1 outer and 3 inner apical spines. 
Male proctiger long, surface minutely im- 
bricate, caudal margin produced. Forceps 
large, 0.6 as long as proctiger; in lateral view 
gradually broadened from near base to 
obliquely truncate apex; in caudal view 
broad, slightly curved to truncate apex, 
medial edge blunt, black; in dorsal view 
medial edge black with two teeth, one broad, 
blunt, caudal and one sharp, medial. Aedeagus 
as figured. Female genital segment large, as 
long as rest of abdomen, entire segment more 
or less bent dorsally. Both valves swollen 
basally then acuminate, styliform to sharp 
apices, dorsal longer than ventral, latter 
strongly papillate, former less so. Ovipositor 
exceeding valves, lateral palps slender, heavi- 
ly sclerotized, rugose, exceeding dorsal valve, 
acute apically. 
HOLOTYPE, male, allotype, female, 2 male 
and 6 female paratypes taken from Senecio 
adamsii near Lake Peel, approximately 4,000 
feet, January 13. 
HOST PLANT: Sene CIO adamsii Cheeseman. 
This species resembles T. acuta Ferris and 
Klyver in its robust form, small wings, and 
general form of genitalia. It was taken in 
small numbers from isolated specimens of its 
host plant scattered on the steep mountain- 
side about a mile below Lake Peel. The host 
plant was at first thought to be a species of 
Olearia but Lush has determined it as 
Senecio adamsii. 
Trioza subacuta (Ferris and Klyver) 
1932 Powellia subacuta Ferris and Klyver, New 
Zeal. Inst., Trans. 63: 38, 39, 44, pi. 10. 
Some supplementary notes to the original 
description are: 
Length to tip of folded wings 3.25- 
3.75 mm. 
color: General color white to yellow. 
Abdomen, especially in male, often chocolate 
brown. Wings hyaline. Body more or less 
PACIFIC SCIENCE, Vol. VI, April, 1952 
Fig. 18. Trioza parvipennis n. sp. a. Lateral aspect of 
male cauda; b, dorsal aspect of tip of clasper; c, lateral 
aspect of female cauda. 
covered with powdery wax, especially prom- 
inent on first abdominal tergite. 
STRUCTURE: Body slender, surface rough, 
with short sparse pubescence. Head large, as 
wide as mesoscutum. Genal processes slender, 
divergent, acute, 0.8 as long as vertex. An- 
tennae very slightly over twice as long as 
width of head. Postocular areas small. Pro- 
notum short, much depressed below plane of 
vertex. Forewings nearly 3 times as long as 
wide, bluntly angular. The apex of the male 
