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f. Usually not gall makers, though sometimes leaf curlers. A 
large varied assemblage of species - Trioza Foerster. 
f. Gall makers. A small and poorly defined assemblage of mostly 
Southern Hemisphere species Cecidotrioza Kieffer. 
d\ Genal cones not at all divergent, long and closely appressed to 
each other Neotriozella Crawford. 
c 2 . Genal cones wanting; gen as sometimes swollen beneath antennal 
sockets; notum usually not much arched Kuwayama Crawford. 
b 2 . Forewings without marginal spots on hind margin; veins usually 
setigerous Hevaheva Kirkaldy. 
dr. Hind tibiae with a basal spur (sometimes small). 
b 1 . Antennae slender, not densely hairy. 
c\ Forewings not opaque nor maculated, but transparent, with radius 
usually short; vertex not produced cephalad into horns; meta- 
coxse with a pair of anteriorly directed processes ; hind tibiae 
usually with a conspicuous spiniform tooth near apex; genal 
cones present or wanting, seldom conical.-. Megatrioza Crawford. 
c 2 . Forewings semiopaque or opaque, maculated, with radius extending 
nearly to tip; vertex produced cephalad into a pair of horns. 
Cerotrioza g. nov. 
b 2 . Antennae thick and very densely hairy; genal cones present; ver- 
tex very broad; forewings transparent, radius long. 
Stenopsylla Kuwayama. 
Trichochermes Kirkaldy (Kuwayama ’10: 54), as represented 
/ by two Japanese species, is not recognized in this work as dis- 
tinct from Trioza. It was separated chiefly on the pubescent or 
hirsute dorsum, but this makes a very unnatural and wholly un- 
satisfactory division. At least one species of Trioza, named by 
Kuwayama himself, has the pubescent dorsum characteristic of 
the other group but was placed by him in Trioza rather than in 
Trichochermes. Trichochermes bicolor Kuwayama appears to be 
very close to my Trioza divisa. Both of Kuwayama’s species of 
Trichochermes are included in the synoptic key to the species of 
Trioza. 
Epitrioza Kuwayama (’10: 55), as originally characterized, 
appears to be not a well-defined genus. Its chief distinguishing 
character was said to be the position of the forewing apex in 
relation to the apical veins, but this characteristic is so variable 
in the genus Trioza that confusion and quite unnatural segrega- 
tion of species would surely result if this criterion were adhered 
to closely. Kuwayama’s characterization of both the genus and 
its one species is rather Incomplete, but certain features suggest 
a rather close relationship of this to my Megatrioza. However, 
until an opportunity is had to examine material of this Japanese 
species, I do not wish to make any disposition of it nor to merge 
Megatrioza into it. 
