114 
males, February 7; (see discussion under T. 
compressd) . 
HOST PLANT: Okaria Hid folia Hook. 
The large size, broad wings, and type of 
genitalia distinguish this species from all 
others known except T. scohina and T. lati- 
forceps, from both of which it differs in color 
and details of structure. 
Trioza scohina n. sp. 
Fig. 23 
Length to tip of folded wings 3.75- 
4.50 mm. 
color: General color yellowish buff. Ab- 
domen somewhat darker, especially tergites. 
Forewings yellowish. 
STRUCTURE: Body surface rough, shining, 
with short sparse pubescence. Head large, 
nearly as wide as mesoscutum. Vertex with 
deep discal foveae, bulging but not over- 
hanging anteriorly. Genal processes small, 
divergent, acute, 0.66 as long as vertex. An- 
tennae slightly over twice as long as width of 
head. Eyes of moderate size, postocular areas 
large. Pronotum long, vertical, depressed 
below vertex. Forewings large, very broadly 
•rounded, only slightly more than twice as 
long as wide, membrane thickened, without 
points; Rs long, sinuate, marginal cells equal. 
Hind wings large, thickly set with minute 
points. Metatibiae with basal serrations, 1 
outer and 3 inner apical spines. 
Male genitalia large. Proctiger with small 
apical epiphysis, very broadly produced 
caudad, with marginal row of large setae. 
Forceps shorter than proctiger; in lateral 
view straight, obliquely narrowed apically, 
tip blunt; in caudal view stout, nearly straight, 
incurved apically to sharp tips; in dorsal view 
apices black tipped, sharp. Aedeagus as 
figured. Female genital segment large, longer 
than rest of abdomen; dorsal valve with tuft 
of large setae, apical third styliform, down- 
curved, with heavy retrorse sclerotic points; 
ventral valve nearly as long as dorsal, swollen 
basally then laterally compressed, apical por- 
PACIFIC SCIENCE, Vol. VI, April, 1952 
Fig. 23. Trioza scohina n. sp. a. Lateral aspect of male 
cauda; b, lateral aspect of female cauda. 
tion heavily sclerotized, thickly set with fine 
retrorse spines. 
HOLOTYPE, male, allotype, female, numer- 
ous male and female paratypes from Okaria 
lacunosa^ January 10 and 12, on and near 
Balloon Hill in the Mount Arthur Tableland 
area. 
HOST PLANT: Okaria lacumsa Hook. 
Although quite close to T. crinita this 
species is easily distinguished from the latter 
by the larger size, broader wings, shorter 
genal processes, the downcurved apical por- 
tion of the dorsal valve of the female, and the 
broader, sharp-pointed male forceps. 
