878 MESOZOIC INSECTS OF QUEENSLAND, vii., 



Genus T e i a s s o c i x i u s, n.g. ( Text-fig . 12) . 



Allied to Mesocixius, from which it differs by the closer ap- 

 proximation of the first and second dichotomies of R, and by 

 the presence of a series of oblique veinlets running from the 

 most anterior branch of R to the costal border. The condition 

 of the media and cubitus is much the same as in Mesocixius, but 

 there are two cross-veins between R 4+ - and M, and also between 

 R 3 and R 4+ 5- (Clavus not preserved.) 



Genotype, Triassocixius austr aliens, n.sp. (Upper Triassie, 

 Ipswich, Q. ) . 



With regard to the naming of the branches of R, the same re- 

 marks apply to this genus as to the previous one. 



Triassocixius australicus, n . sp . (Text-fig. 12). 



Greatest length of fragment, 10.5 mm., representing a tegmen 

 of total length about 12.5 mm. Greatest breadth, 5 mm. 



The venational characters are included in the generic defini- 

 tion. The specimen is incomplete, not only in the loss of the 

 clavus, but also in having a considerable part of the apical area 

 of the tegmen broken off along a very irregular line, together 

 with a small portion of the base. It is very finely and closely 

 pitted all over, closely resembling Protocixius in this respect. 



Type, Specimen 267a. (Coll. Queensland Geol. Survey). 



Family IPSVICIIDAE. 



On the clavus, veins 1A and 2A form a definite Y-vein. but 

 2A lies very close to the margin for portion of its length. Teg- 

 mina of moderate size and of a peculiar cultriform shape, the 

 apex more or less pointed, the anal angle strongly marked, and 

 the posterior border from this angle to near the apex quite 

 straight. Main veins separate at their bases, but Sc, R, M and 

 Cu all meet at a point not far from the base, much as in the 

 more typical Scytinopteridae. From this point only two veins 

 proceed distad, the anterior one being R, the posterior one M + 

 Cu, which divides further distad into M and Cu. The distal 

 portions of these veins very indistinctly marked. Border of 

 tegmen thickened, especially anteriorly, into a coriaceous mar- 

 gin. 



Genus Ipsvicia, n.g. ( Text-figs . 13-15 ) . 



R gives off a series of transverse branches to the anterior 

 border. Cu diverges from M at about one-third of the win-- 



