332 Annals cf the South African Museum. 



border, and reaching nearly to the apex. Media free, dividing into 

 a variable large number of branches directed towards the apical 

 border. Cubitus also free, brandling variably, the branches directed 

 towards the posterior border. Anal field large, well-defined, usually 

 somewhat cultriform. with more or less curved veins running chiefly 

 towards the posterior border. Intercalated veins and reticulation 

 or en iss- venation may or may not be present. Mostly small to medium- 

 sized forms." (Proc/Linn. Soc. N. S. Wales, XLIV. 2, 1919, p. 366). 



The fossil S. A. M. Cat, No. 5634 consists of a piece of shale and 

 a partial counter-piece showing a nearly complete insect. One 

 tegmen is folded hack on the body; the other is spread out at right 

 angles to the body and is preserved without the apex as an impres- 

 sion on slab 5634a. 



The width of the tegmen is just over one-third of the probable length 

 (which is about 9 mm.). The humeral area is narrow and distinctly 

 less in length, from base to apex, than the anal area, and is bounded 

 distally by a slightly double-curved suh-costa which is apparently 

 unbranched. The humeral area is sharply pointed at the apex. 



The radius is strongly double-curved. It gives off eight primary 

 branches to the anterior border, excluding the forked distal end; of 

 these, the first six are simple veins, the seventh and eighth forked. 

 The median has four branches which apparently extend to the 

 border below the apex. The cubitus has at least six branches. 



In the area covered by R, M, and Cu strong raised ridges sepa- 

 rate the veins. These are preserved as strong channels; but that 

 they are not true veins is shown by the fact that they do not unite 

 with one another basally, whereas the true veins do. There are 

 faint indications of crossvenation on the proximal portions of the 

 area covered by M and Cu. 



The anal area has the vena dividens strongly marked. The first 

 anal vein rises from the vena dividens but ends at the wing border 

 just below the apex of the area. The third vein is forked at some 

 distance from the border. The fourth vein is waved, as is the fifth - 

 the latter being forked near its distal end. The sixth vein is also 

 waved. In the anal area, there are indications of faint ridges 

 between the veins. There is also a certain amount of irregular 

 cross-venation. 



Comparison of this wing with the forms from the Ipswich Beds 

 of Australia gives the following results: - From Triassoblattina it 

 differs in the narrower humeral area, the reduced nature of the 

 subcosta, the stronger double-curving of the radius, and in the fact 

 that none of the anal veins end distally on the vena dividens. There 



