194 
Psyche 
[December 
Text-figure 6. Drawing of holotype of Meg elytron robustum Tillyard 
(holotype). Original. Lettering as in text-figure 1. 
examination of this fossil has convinced us that the supposed reticu- 
lation and some weak veins in the elytron are only impressions of 
parts of the hind wing venation. The vein which Tillyard identified 
as M in his figure is clearly a hind wing vein; this is also true of 
the peculiar veins which he shows in the anal region of the elytron. 
Use of ammonium chloride covering on the fossil has indicated the 
difference between the veins which are actually part of the elytron 
and those which show through from the hind wing below. The 
venation of the elytron, as it now seems with reasonable certainty, 
is shown in the accompanying figure (text-figure 5). 
In addition to having the small clusters of setae in the region of 
the base of the subcosta and the inner angle of the anal area, the 
elytra of Megelytron are covered with fine hairs; no other elytra 
of Protelytroptera which have been described have shown hairs so 
distinctly and so dense, although a punctation or some other type of 
sculpturing is usual. The type specimen of Megelytron also shows 
a pronotal disc which resembles that in P arablatt elytron. The leg 
segments, apparently the femora and tibiae, are not distinctive except 
