xv. 2 Crawford: Jumping Plant Lice 185 



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. 



<F. Genal cones not at all divergent, long and closely appressed to 



each other _ Neotriozella Crawford. 



c 3 . Genal cones wanting; gense sometimes swollen beneath antennal 



sockets; notum usually not much arched Kuwayama Crawford. 



b". Forewings without marginal spots on hind margin; veins usually 



setigerous Hevaheva Kirkaldy. 



a 2 . Hind tibiae with a basal spur (sometimes small). 

 b\ Antenna? slender, not densely hairy. 



c\ Forewings not opaque nor maculated, but transparent, with radius 

 usually short; vertex not produced cephalad into horns; meta- 

 coxae with a pair of anteriorly directed processes; hind tibia? 

 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\ Antenna? 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. 



