876 



MESOZOIC INSECTS OF QUEENSLAND, VII., 



base, much as the upper branch of R does, further on, in Permo- 

 scarta; that, in this latter genus, Cu la does not end at the apical 

 angle of the clavus; and that vein 2A seems to be absent. 



Subfamily MESOCIXIINAE. 



Genus Mesocixius, n.g. ( Text-fig . 11 ) . 



Tegmen considerably broader near base than towards apex. * 

 Costal area fairly wide. R branches diehotomously at about 

 one-third of the wing length from the base. The upper branch 

 of R branches again at a point further from the original forking 

 than the latter is from the origin of R; the upper branch so 

 formed sends only two veinlets to the costal border, while the 

 lower divides into two simple branches, R 2 anf l R 3 . M forks 

 diehotomously at about two thirds of the wing length from the 

 base ; the upper branch, M 1+2 divides into, two near the border ; 

 the lower, M 3+4) has four short, subparallel, descending branches. 

 A closed median cell is present, by a strong cross-vein. Ciij 

 has a strong distal fork. Cu lb ends up a little beyond the 

 apical angle of the clavus, while Cu la is itself forked near the 

 tving border.- Cross-veins connect R x with R 2) t» 4 _|_ 5 with M 1+2 

 and M with Cu la> (Clavus not preserved). 



Genotype, Mesocixius triassicus, n.sp. (Upper Triassic, 

 Ipswich, Q . ) . 



It is, of course, impossible to decide whether Sc is really pre- 

 sent in this fossil or not. The naming of the branches of R is 

 given only provisionally, to facilitate comparison with other 

 genera of the family. If this genus and the succeeding one 



Text-fig.10. 

 Nesocharis sp., tegmen (Cixiidae). (x 12). 



For lettering see p. 895. 



