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PACIFIC SCIENCE, VoL VI, April, 1952 
definite link with Australia and also occurs in 
the Lau and Society Islands. 
The new genus Anomalopsylla is most close- 
ly related to Tainarys of any known forms. 
On the basis of the peculiar wing venation 
alone, it could be assigned to the subfamily 
Ciriacreminae. However, as it differs widely 
from any known forms placed in that sub- 
family, and as I believe the presence of a cross 
vein or veins to have arisen separately a num- 
ber of times in the family, it is placed tenta- 
tively in Spondyliaspinae. Both this genus and 
Tainarys seem to show some affinity to the 
distinctive Australian fauna. However, until 
the fauna of South America is much better 
known than it is at present, the degree of 
relationship between these genera and the 
Australian representatives of this subfamily 
is doubtful. Although I have seen no speci- 
mens of Rhinocola aceris, it would appear to be 
quite similar to Tainarys and Anomalopsylla in 
many ways, especially in the head structure 
and the lack of meracanthi. 
The species Atmetocranium myersi seems to 
be a migrant from the tropical Pacific area. 
If the species placed in Metaphalara [Gyro- 
psylla] by Ferris and Klyver was properly 
assigned, this represents another link with 
the Americas, as the other known species of 
this genus are all American. 
The dominant group present is the genus 
Trioza, which, being ubiquitous, furnishes 
little evidence for conclusions as to relation- 
ships with other faunas. 
At present, then, it can be said that the 
demonstrated distributional relationships 
seem to be threefold, one group showing 
definite kinship to Australia, one to South 
America (one to both of these areas), and one 
to the tropical Pacific region. The first two 
would seem to argue for the often-postulated 
Antarctic connection of the lands south of 
30°. Granting such a connection in the past, 
the area of origin and direction of migrations 
are still completely unanswered. There is, 
however, nothing to suggest New Zealand 
as the origin of any of the groups which are 
found there. 
SYSTEMATIC TREATMENT OF NEW ZEALAND 
SPECIES 
The species of Psyllidae now known from 
New Zealand represent four subfamilies, the 
Psyllinae, Triozinae, Pauropsyllinae, and 
Spondyliaspinae. 
Keys to the species of the various genera 
are not included as it has been found im- 
possible to prepare satisfactory keys without 
using genitalial characters predominantly, 
and I feel that such keys would have but little 
value. 
KEY TO GENERA FOUND IN NEW ZEALAND 
1. Basal vein of forewing branched tri- 
chotomously Trioza 
Basal vein of forewing branched di- 
chotomously 2 
2. Vertex without coronal suture; proxi- 
mal segment of metatarsi without 
claws Atmetocranium 
Vertex with coronal suture; proximal 
segment of metatarsi with one or 
two claws 3 
3. Genae more or less strongly produced 
as lobate processes 4 
Genae not at all produced 5 
4. Mesotibiae with a longitudinal comb 
of short setae near apex .... Ctenarytaina 
Mesotibiae without subapical comb of 
setae Psylla 
5 . Metacoxae without meracanthus ; fore- 
wing with extra branch on cubitus, 
cross vein between Rs and Mi 
Anomalopsylla 
Metacoxae with meracanthus; forewing 
with cubitus two-branched, without 
cross veins Gyropsylla 
PSYLLINAE 
This, the typical subfamily, is represented 
in New Zealand by two genera, Psylla and 
Ctenarytaina. 
The species here placed in Psylla fall into 
