BY R. J. TILLYARD. 881 



This teg-men appears almost unicolorous in the fossil; but it 

 is probable that the tubercular areas would have appeared pig- 

 mented in the cast, if that had been preserved, seeing that, in 

 the other two species, in which portions of both cast and mould 

 are preserved, the former shows the patches strongly darkened . 



Type, Specimen No. 122a. (Coll. Queensland Geological Sur- 

 vey). 



Horizon: Upper Triassic, Ipswich, Q . 



This tegmen is certainly the most perfect of all the Ipswich 

 fossils, and it would be hard to imagine that any wing could be 

 preserved in better condition. 



It gives me much pleasure to dedicate this species to Mr. A. J. 

 Jones, the present Minister for Mines in Queensland. 



Ipsvicia maculata, n.sp. (Text-fig. 14). 



This species is represented by portions of both cast and mould 

 of a right tegmen. Of these, the cast shows the whole tegmen, 

 except only the clavus, which is broken off irregularly along 1A, 

 and the base of the tegmen above it, which is missing as far as 

 the line xy in Text-fig. 14. The mould also has the clavus miss- 

 ing, but the base of the wing is preserved; there is, however, a 

 piece missing from the costal border, out of which a triangular 

 piece has been torn, as represented by the line ab in the same 

 figure. Making separate drawings of both cast and mould, re- 

 versing one and placing it on top of the other, we get the 

 composite figure shown in Text-fig. 14, which has been drawn 

 with apex to the left, for convenience of arrangement with the 

 figures of the other two species. 



Total length, 13.5 mm. Greatest breadth, 4.6 mm. at apex 

 of clavus, representing a probable maximum breadth at the claval 

 angle of about 5.8 mm. 



This species comes close to I. jonesi, n.sp., from which it may 

 be distinguished as follows : 



The coriaceous costal border is not so strongly built. The 

 width across the tegmen at the apex of the clavus is greater, 

 though the total length of the tegmen is slightly less; this in- 

 dicates a somewhat different shape, as shown in the restored 

 teginen in Text-fig. 14. Veins very faintly indicated. R tends 

 to converge towards the costal border distally, so that the space 

 between them narrows gradually, instead of remaining nearly the 

 same length throughout, as in I. jonesi. There are ten cross- 



