BY R. J. TILL YARD. 



877 



really belong to a group ancestral to the true Cixiidae, then 

 it should be noted that the first dichotomy of the vein here 

 called 1\ is really a dichotomy of a fused stem R-Sc into Sc 

 above and K below, and that Sc branches again, while R remains 

 unbranched. For comparison of the venations of the fossil with 

 the true Cixiidae, 1 give, in Text-fig. 10 the venation of the 

 tegmen of Nesocharis sp. 



Mesocixius triassicus, n.sp. (Text-fig. 11). 



Total length of tegmen, 10 mm. Greatest breadth, 4 mm. 



The venational characters have been included in the generic 

 definition. The tegmen appears to have been moderately tough 

 and leathery, and is finely and closely pitted all over. The speci- 

 men is complete, except only for a tiny piece missing above the 

 apex, and the loss of the clavus, which, as usual, has become 

 detached along the groove of the vena dividens . 



T y p e. Specimen No. 215 (Coll. Queensland Geol. Survey) . 



Text-fig. 11. Mesocixius triassicus, n.g. et sp, (x7-5). For lettering 



see p. 895. 



Text-fig. 12. Iriassocixius amtralicus, n.g. et sp. (x 7-5). For 



lettering see p. 895. 



