Structure of some Australian Lepidoptera Homoneura. 599 
veins being fused for a considerable distance; and there 
is no trace of the posterior arculus. There is no median 
cell, but on the analogy of Anomoses, as will be shown 
presently, I assume that its absence is due to the loss of 
the upper primary branch of the media, not to the loss of 
the intermedian as in Sabatinca. The three median veins 
are well-developed, but there is no trace of M4, which 
should unite the media with Cula. As a consequence the 
lepidopterous cell is left open, but a spurious cell, very 
much resembling it, is bounded beneath by the media and 
its lower primary branch. The cubitus divides into Cula 
Fra. 6.—Palacoses scholastica Turn, Fore- and Hind-wings. 
and Culd very near its termination, the latter vein being 
short and weak, but there is no trace of Cu2. There is a 
solitary anal vein with no U-loop at its base. The neura- 
tion of the hind-wing differs only in the absence of the 
humeral cross-bar, the absence of branching of the sub- 
costal, and the absence of any anal vein, although the 
anal area of the wing is rather large. The structure of 
the antennae is of primitive undifferentiated type as in 
Sabatinca. Mandibles and maxillary palpi are absent, 
but the labial palpi are fairly large and covered with 
rather long hairs. ‘Tibial spurs are absent as in the 
Hemalidae. 
Before discussing the systemic position of this curious 
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f ms Nig Srl =, “ 
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