BY R. J. TILL YARD. 883 



M and Cu are united for a much shorter length than in I. 

 jonesi; their distal courses are too faint to be made out with 

 certainty. The tubercular patches are smaller, more distinct 

 and more separated than in I. jonesi, and appear of a dark 

 brown colour on a pale ground. Between these patches, the 

 tegmen is strongly pitted all over, the pits being fairly large and 

 shallow, and placed considerably further apart than are the 

 tubercles of the patches. The courses of the veins are marked 

 by the regular arrangement of these pits along either side of 

 them . 



Type, Specimens 208a (cast) and 208b (mould), in separate 

 boxes. (Coll. Queensland Geological Survey). 



Horizon: Upper Triassic, Ipswich, Q . 



The specific name indicates the very strongly spotted appear- 

 ance of the tegmen, especially in the cast, when viewed with the 

 naked eye. 



Ipsvicia acutipennis, n.sp. (Text-fig. 15). 



This species is represented by a well preserved cast, broken 

 off irregularly along the vein 1A, so that the whole of the clavus 

 and a small portion of the base are missing; also by a small por- 

 tion of the mould, showing only the middle parts of the veins 

 R, M and Cu. 



Total length, 13.5 mm. Greatest breadth, 4 mm., just beyond 

 apex of clavus. 



Apex much more acute than in the two preceding species, the 

 costal coriaceous border less strongly marked, the space between 

 costal margin and R distinctly narrower, and crossed by twelve 

 regularly arranged cross-veins. R is united with M by a 

 strong cross-vein as in I. jonesi, but the course of M beyond 

 this point is much straighter than in that species. M united 

 with Cu for about the same distance as in I. jonesi; just 

 before the level of the cross-vein connecting it with R, M gives 

 off a descending branch, which meets the upper branch of Cu, 

 thus forming an elongate closed area between them. Distal 

 courses of Cu and lower branch of M indistinct, but rest of 

 venation more clearly marked than in the other two species. 



Tubercular patches small, distinct and separate, much as in 

 I. maculata, the previous species, and appearing strongly pig- 

 mented in dark brown, on a pale ground-colour, especially in the 

 cast. 



