1964] 
Carpenter and Kukalovci — Protelytroptera 
tapering structures, almost certainly constituting a small ovipositor. 
Neither elytron is quite complete, but only two important details 
are missing: the point of termination of Sc and the distal part of 
the sutural margin. In all probability both of these were as 
described for Archelytron. In both elytra one cross vein between 
M and CuA is slightly oblique, but this is not heavier than the 
others and seems almost certainly not a branch of M. 
The hind wing seems only slightly longer than the fore wing; 
the subcosta is distinctly longer than in Protelytron; Rs arises after 
the mid-wing, much later than in Protelytron ; the stem of M, 
although not fused with R, as in Protelytron , is very close to it, 
especially proximally. The anastomosis of CuA and M is very 
different from the structure of these veins in Protelytron and the 
fulcrum of the latter is completely absent, although it is suggested 
by the convergence of Rs, M and CuA distally. Another striking 
difference between Protelytron and A pachelytron is in the configura- 
tion of CuP, i A and 2 A. In Protelytron CuP and iA are very 
close together and parallel and iA gives off a long series of radiating 
anal veins. In A pachelytron CuP and iA are remote proximally, 
though fused distally; and 2A gives rise to the radiating anal veins. 4 
It is apparent that more differences exist between the hind wings 
of Protelytron and A pachelytron than between the elytra. 
Family Blattelytridae Tillyard 
Blattelytridae Tillyard, 1931, Amer. Journ. Sci. 21:249; Carpenter, 1939, 
Proc. Amer. Acad. Arts Sci., 73:60. 
This family, which now includes several species of Parablat- 
telytron, one of Permelytron (probably inseparable from Parablat- 
telytron) and the type-species of Blattelytron has been known up 
to the present time only by elytra. The venation of the elytra shows 
much individual variation in the degree of development of the veins 
(Carpenter, 1939, p. 62) ; the family is characterized so far as the 
elytra are concerned by the obsolescent nature of the veins of the 
elytra and probably also by the absence of Rs. One specimen of 
Parablattelytron subinchum Tillyard, collected at the Elmo locality 
in 1958, is nearly complete, showing the hind wings as well as parts 
of the body and the elytra. Since this has not previously been de- 
scribed, it is considered here in order to permit comparison with the 
complete specimens of Protelytron and A pachelytron. 
4 A somewhat similar variation in the origin of the anal veins forming 
the fan of the hind wing occurs in the Blattaria. 
