BY R. J. TILLYARD. 



427 



The insect lies upon the somewhat uneven surface of a dark 

 grey shale, in such a position that it is crushed down somewhat 

 dorso-laterally, the hindwing apparently covering the thorax, and 

 having its costal margin passing under the posterior border of 

 the forewing. This latter wing, however, lies at a slightly higher 

 level; so that, in the process of delamination, its posterior border 

 was lifted off, exposing the whole basal portion of the costal 



Text-fig U. 

 Ai'ropkuia mirabilis, ii.g. et sp., (Triassic, Ipswich, Q. ). Sketch of the 

 whole fossil in situ, ( x 2) to show the relative positions of the different 

 parts. A, A, principal portions of the fore- and hindwings, figured in 

 Plate xHv., fig 12; B, distal portion of forewing, figured in Text-fig. 

 lo. To the left of the wings are shown the crushed portions of the 

 head and thorax. The fossil remains are left unshaded, the rock 

 itself is lightlj' shaded, and the deep break between the parts A and 

 B is shown in black. The rock around B has been partly cut away 

 with a penknife. 



margin of the hindwing. Around the bases of the wings there 

 are scattered a number of chitinous pieces, some belonging to 

 the head, and some to the thorax of the insect. These are so 

 much crushed that they cannot be recognised witli certainty; but 

 there are two very concave impressions close together, one circular 

 and the other an irregular oval, which may represent portions of 

 the compound eyes. Below the hindwing, there are two narrow 

 elongated fragments, one about 14 mm. long, the other about 



