90 
PACIFIC SCIENCE, VoL VI, April, 1952 
orly. Propleura not equal. Forewings broadly 
rounded, 2.4 times as long as wide, mem- 
brane thickly set with minute points; ptero- 
stigma long and narrow, Rs nearly straight, 
marginal cells very large, nearly equal. Hind 
wings large, nearly reaching apex of fore- 
wings. Metatibiae with small basal spur, 5 
apical spines, 1 on outer margin, 4 on inner 
margin. Proximal segment of metatarsi with 
1 black claw on outer margin. 
Male proctiger elongate, oblique apically, 
strongly produced caudad basally, caudal 
lobe with apical hook as figured. Forceps 
shorter than proctiger; in lateral view broad 
basally, almost evenly narrowed to blunt, 
black, incurved apex; large lobe arising on 
mesal surface, projecting anteriorly, sharp, 
black at tip; in caudal view stout, nearly 
straight to sharp black tips, black-margined 
mesal lobes touching, black tipped, sharp. 
Female genital segment shorter than rest of 
abdomen; dorsal valve slender apically, 
blunt; ventral valve very deep, blunt. 
HOLOTYPE, male, allotype, female, numer- 
ous paratypes collected on Acacia decurrens 
in the Waitakere Hills near Auckland, Sep- 
tember 29, additional paratypes from the same 
host at various localities and dates. 
HOST PLANT: Acacia decurrens Willd. 
This is the second most abundant of the 
three species of 'Psylla which were taken on 
this species of Acacia, It is a handsome, 
graceful little species with very distinctive 
male genitalia. Of the New Zealand forms, it 
seems to be nearest P. uncatoides. 
Psylla (Acizzia) exquisita n. sp. 
Fig. 3 
Length to tip of folded wings 1.50- 
1.75 mm. 
COLOR: Body white to yellow with some 
fuscous especially on legs and abdomen. 
Forewings white with three irregular, trans- 
verse black bands. 
\ 
structure: Body surface finely punctate, 
dorsum glabrous. Head wider than meso- 
scutum, scarcely deflexed. Vertex short. 
rounded down anteriorly, deeply excavate 
next eyes, lateral ocelli on large protuberances. 
Genae scarcely produced, not touching, large 
frons visible. Antennae far laterad, sockets 
almost touching eyes, 1.8 times as long as 
width of head. Eyes of moderate size, reces- 
sive, appearing somewhat stalked from shape 
of vertex. Pronotum long, sharply depressed 
anteriorly. Forewings broadly rounded, 2.5 
times as long as wide; pterostigma large, Rs 
slightly sinuate, marginal cells large, equal, 
membrane somewhat thickened, very thickly 
set with minute points. Hind wings nearly 
equaling forewings, set with minute points. 
0.1% mm. 
I i - -__i 
Fig. 3 . Psylla exquisita n. sp. a^ Lateral aspect of male 
cauda; b, lateral aspect of female cauda. 
Metatibiae with small basal spur, 1 outer and 
4 inner, black, apical spines. Proximal seg- 
ment of metatarsi with 1 black claw, outer. 
Male proctiger long, slender, with basal 
caudal lobe. Forceps shorter than proctiger, 
somewhat sinuate, blunt, curved caudad api- 
cally, with small mesally projecting lobe on 
mesal surface (see Fig. 3^). Female genital 
