40 PROCEEDINGS OF THE ROYAL SOCIETY OF QUEENSLAND. 
just before median cross-vein ; a cross-vein between R 3 and R 4 . Median 
fork (mf) near base; mf 1 before one half, simple; M 2 bifurcate; an im 
cross-vein present between M 2 and M s . M 4 forming a reverse fork with 
Cu ia but dividing again and M 4 free at margin. M 5 present as a short 
vein to Cu. Region of cubital fork (cuf) not available in type; Cu ia 
joining M 4 ; Cu^ continuing straight to margin; Ou 2 present. Pcu a 
strong vein; region of anal (vannal) veins not preserved. Length of 
available portion of forewing 11 mm. Pig. 1. 
Hindwing similar to forewing but with costa more angulate and 
apex situated slightly posterior to R 5 . Veins much as in forewing except 
that there are no apparent traces of the possible cross-vein between 
Sc and R 4 ; R 4 is from R 3 well before r-m cross-vein. Length of pre- 
served portion of hindwing 9 mm. Fig. 2. 
Holotype, the counterpart of an impression of a forewing labelled 
“Mt. Crosby No. 218” in University of Queensland Collection: (Cata- 
logue No. F. 7853) ; belonging to this is a fragment of the obverse 
impression, labelled “218 a” in University of Queensland Collection 
(F. 7854) ; paratype, a hindwing labelled “207” in University of 
Queensland Collection (F. 7855) ; for this no counterpart was recovered. 
Locality: Triassic of Mt. Crosby, S. Queensland. Collected by 
F. A. Perkins. 
I 
The hindwing resembles the forewing in a similar manner and to 
about the same degree as does the fore and hindwing in any primitive 
Mecopteroid insect of comparable size. 
The formal description of the species is to be regarded as based 
on the type forewing. The hindwing which has been associated with 
it, as a paratype, was found separately; therefore there is no direct 
proof that it actually belongs to the same species. However the two 
specimens are so closely comparable that in any living species of 
primitive Lepidoptera, for example, it would be difficult not to regard 
them as fore and hindwing of one species, or at least as belonging to 
closely allied members of the same genus. 
R 4 near apex is sinuate as though there was a pterostigmatic area 
on the costal margin at its apex, but no special texture of the wing 
surface can be detected in this region, so that this feature must be 
regarded at most as indicating what might be a relict feature. 
Theoretical Discussion. 
The position of this fossil in the classification of insects may be of 
considerable theoretical importance, since it seems possible that it is 
one of the earliest known relatives of the Lepidoptera, an order con- 
cerning whose early geological history in Mesozoic times, nothing is 
known. Its discovery will therefore arouse new interest in the possible 
origins of the Lepidoptera. 
