Psyllidae of New Zealand ~ Tuthill 
Fig. 20. Trioza subvexa n. sp. a. Lateral aspect of 
male cauda; b, lateral aspect of female cauda. 
Postocular area large. Antennae twice as long 
as width of head. Thorax strongly arched. 
Pronotum narrow, depressed below plane of 
vertex. Forewings large, narrowly rounded 
apically (not angular), 2.75 times as long as 
wide; membrane thickly set with points ex- 
cept along veins; Rs long and sinuate, 
cubital cell slightly larger than medial. Hind 
wings large, thickly set with points. Meta- 
tibiae with serrate basal carina, 1 outer and 2 
inner apical spines. 
Male genitalia of moderate size. Proctiger 
short, broadly produced caudad, somewhat 
111 
rectangular in lateral view. Forceps shorter 
than proctiger, with abundant fine setae; in 
lateral view nearly straight, caudal margin 
slightly sinuate, apex rounded, black; in 
dorsal view tips blunt, black margined; in 
caudal view stout, slightly arched, tips in- 
curved, black, sharp. Female genital segment 
nearly as long as rest of abdomen; dorsal 
valve descending, with median hump bearing 
tuft of very long setae, apical third attenuate, 
black, apex sharply upturned, sharp; ventral 
valve shorter than dorsal, apical portion 
slender to sharp tip. 
HOLOTYPE, male, allotype, female, 8 male 
and 5 female paratypes Takaka Hill (between 
Nelson and Takaka), January 8 and 13; 2 
female paratypes, Whangamoa Saddle, near 
Nelson, January 16; 1 male and 2 female 
paratypes, Arthur’s Pass, February 5. All these 
specimens were swept from Olearia avicen- 
niae folia. Numerous additional paratypes, 
males and females, were reared from pseudo- 
galls formed by the curled edges of young 
leaves of Olearia avicenniaefolia taken at Fox 
Glacier on February 7. Nymphs of all stages 
were present at that time. Nymphs and adults 
were also taken at Waiho by L. J. Dumbleton 
on November 20, 1950. 
HOST PLANT: Olearia avicenniaefolia Hook. 
This species is very close to Trioza subacuta 
(Ferris and Klyver) but may be distinguished 
from it by the less angular wings and the 
genitalia — the dorsal valve of the female is 
upturned apically instead of straight, the male 
forceps are rounded rather than obliquely 
truncate apically. 
Trioza compressa n. sp. 
Fig. 21 
Length to tip of folded wings 3.75-4 mm. 
COLOR: General color light brown with 
abdomen dark dorsally and either bluish 
green or cinereous ventrally. Forewings dis- 
tinctly fumate. 
STRUCTURE: Body surface rough, more or 
less covered with powdery wax. Head as wide 
as mesoscutum. Vertex strongly impressed. 
