45 



places, and is a smaller insect than the fossil species. Its wings are 

 somewhat broader, and their colour is black with rich yellow markings. 

 It is fairly common in Eastern Australia. Euporismus on the other 

 hand is exceedingly rare, being only known from the very inaccessible 

 mountainous region on the Great Dividing Range at the head of the 

 Condamine River, Queensland, near the New South Wales border. 

 Also, it is an aquatic insect, resting on rocks bordering the stream. 

 The wing is closety similar in size and shape to that of the fossil, and 

 is coloured black with an intricate pattern of whitish bands and 

 areas. The venations of the two are so closely similar that it is not 

 unreasonable to believe that the fossil specimen represents one 

 individual of a species directly ancestral to Euporismus. 



The wing appears to be a hindwing, judging by the. shape of the 

 costal area. Curiously enough, the large distal patch missing from 

 the specimen corresponds very closely in size and shape with the 

 large black patch en the hindwing of Euporismus albatrox. The 

 coincidence suggests that Euporismites also had a patch in this 

 position, and that the decomposition of the pigment caused the loss 

 of this part of the wing. 



MEASUREMENTS : Greatest length of fragment 22 mm., 

 greatest breadth 10.5 mm. 



TYPE : Spec. 34 (Plate 3, fig. 1). TYPE-COUNTERPART :- 

 Spec. 34&. (Geol. Surv. Mus. Coll.) 



5. DUARINGA FOSSIL INSECTS. 



Order ODONATA. 

 Family LESTID^. 



Genus AUSTROLESTIDION, gen. nov. 

 Plate 1, fig. 6. 



The two specimens 20a and 206, obtained from the core of 

 the Duaringa bore, are counterparts, but are figured together on 

 Plate 1, fig. 6. The impressions, which are poor and not easy to make 

 out, are those of two Zygopterid Dragon-fly larvae, one of which lies 

 obliquely across the other. 



The larger of the two larvae as shown in the figure extends from 

 A to B, the head being clearly seen at A, with considerable remains 

 of the chitinous exoskeleton. Both the compound eyes (e) are easily 

 made out, though much crushed. Between these two eyes lie two 

 elongate pieces of chitin (a) which may represent a detached piece 

 of the epicraniuni, biit appear to be much more probably the flattened 



D 



