586 



MES0Z(JIC INSECTS OP QUEENSLAND, iv. 



Paradunstania affinis, 11. sp. (Text fig. 20). 



Greatest length of fragment, 17 mm. ; greatest breadth, 

 14-5 mm. A very poorly preserved specimen, with very little 

 trace of the brown pig- 

 mentation bordering the 

 veins. A large and deep 

 triangular break has cut 

 out a considerable por- 

 tion of the courses of all 

 the branches of R; the 

 rest of the veins present 

 can be traced out by the 

 use of careful lighting. 



This specimen appears 

 to represent a hem ely- 

 tron intermediate in Text-fig. 20.'^' 

 size between that of Duni<fania pidchva Till., and the much 

 larger hemelytron of Dunstaniopsis triassica, n.g. et sp. In 

 shape, also, it was probably intermediate between these two. 



Type, Specimen No. 147, in the Queensland Geological Survey 

 Collection. 



JVote on the Origin of the Heteroptera. 

 In dealing with the phylogeny of the Order Hemiptera, Hand- 

 lirsch(l, pp. 1244-1 249) rightly insists upon the clear-cut dicho- 

 tomy between the two Suborders Heteroptera and Homoptera. 

 Neither of these two Suborders can be derived from the other: 

 for, on the one hand, the Homoptera have preserved the more 

 primitive wing-form and venation, while, on the other, the 

 Heteroptera have preserved the more archaic form of the head 

 and antenniB. As the direct ancestors of both these recent Sub- 

 orders, Handlirsch indicates some known Hemipterous fossils of 

 the Upper Permian and Lias of the Northern Hemisphere, which 

 he places in a distinct Order, Paleeohemiptera, on the ground 

 that it is not possible to demonstrate that they are definitely 

 either Heteropterous or Homopterous. The Palseohemipteia he 



Paradiimtaula njini^, n.g. et sp. ; ( x2'8). Upper Triassic, Ipswich, Q. 



