TRIASSIC INSECTS OF QUEENSLAND. 
45 
SUMMARY. 
Eoses trimsica a member of the order Lepidoptera, falling into a new 
suborder, the Eoneura is described from the Triassic Beds of Mt. Crosby, 
South Queensland. There is a theoretical discussion on the significance 
of this discovery of the first supposed Mesozoic member of the 
Lepidoptera. 
Postscript : Washington, D.C., 10 th October, 1944. 
In the United States National Museum collection there is a male specimen of 
llcpialus seguoiolus Behrens, from Mendocino, California, which has both 
M, a and M 2 b iiresent in the forewings, as in the fossil Eoses.. Bight and left fore- 
wings both have this feature which, so far as known, is unique among living 
Lepidoptera. The liindwings are normal. Text-fig. 3 gives a representation of the 
venation of this interesting specimen. 
Text Fig. 3. 
Venation of aberrant male of Hcpialus sequoiolus Behrens, from Mendocino, 
California. 
No other specimen of this species among ten others in the collection has been 
discovered to possess this aberrant condition, nevertheless the appearance of a 
bifurcate M 2 , even as an occasional atavistic survival in a living member of the 
Hepalidae, may be considered to furnish some small measure of proof that the 
ancestor of the Lepidoptera Honroneura may once have possessed this character 
as a normal feature of its venation. 
The discovery may be held to strengthen a little the view that Eoses is an 
early Lepidopteron allied to the main stem from which the Homoneura have 
evolved. 
P ^m 3 
Cu lb M 4 +Cuia 
/R4 
R 5 
1 
