576 



MESOZOIC INSECTS OF QUEENSLAND, 



Specimen No. 107a is to be made tlie type of a new genus and 

 species, Dunstaniopsis triassica, n.g. et sp., while specimen No. 

 147 will also be the type of a new genus and species, Paradun- 

 stania affinis, n.g, et sp. All these are evidently members of 

 the same family, Bunstaniidff, the venational differences being, 

 at the most, only of generic value. 



Tn discussing the venation of the Bunsfaniidce, we shall make 

 use of the most complete specimen, Duiistaniopsin triassica, n.g. 

 et sp., supplemented by the type of the family, Dnii^tanui 

 pidchra Till. It will be necessary to compare the venation on 

 the corium of the former with the tracheation to be found on the 

 same area of the hemelytta of recent Heteroptera. Unfortu- 

 nately, few reliable figures of the latter are available. I have 

 selected as the most suitable for our purpose the excellent figure 

 of the tracheation of the nymphal fore wing of Syromastes {idixnWy 

 Coreidcp) given by Handlirsch (1, Atlas, PI. vii., fig. 3). It is 

 not necessary to figure the corresponding venation in the imago, 

 as it onl}' differs from that of the nymph in the greater differ- 

 entiation Ijetween corium and membrane^ the dividing line 

 becoming a complete whole, and effectually concealing the con- 

 nections between the veins on the corium and those on the mem- 

 brane. Consequently, such an archaic type as Dunstaniopsis is 

 more closely comparable with the tracheation of the nymphal 

 wing of Syromastes than with the venation of the imaginal wing. 



Text-fig. 17. 

 Tracheation of forewing of iiympli of Syromastes sp. ; ( x 8). After Hand- 

 lirsch. For lettering, see p. 592, 

 Text-tig. 1 7 shows the tracheation of the nymphal wing in 

 Syromastes. The wing consists of a hard coriaceous basal half, 



