1930 ] 
Permian Insects of Kansas 
355 
3072a, apical half of wing (fore?) ; No. 3073, hind wing, 
complete and splendidly preserved; 3074ab, base of hind 
wing. In the Sellards collection I find one specimen, No. 
308 (reverse, No. 309), fore wing, complete except for 
apex. 
The holotype specimen consists of a very nearly com- 
plete fore wing and hind wing, with parts of the corre- 
sponding pairs. The bases of the fore wings are obscured 
by an abrupt bend in the surface of the rock, and the 
bases of the hind wings are missing entirely. Tillyard was 
therefore not able to obtain a clear vision of the venation 
at the base of the wings, and his figure of this part is in- 
correct. Cul is undoubtedly united with Cu2 at the base 
of the wing, but it runs along in contact with R + M for quite 
a distance before diverging backwards; this is essentially 
the same structure as in Protohymen, only in that genus 
Cul diverges from R + M much nearer to the base of the 
wing. The subcosta cannot, of course, be seen in the 
holotype, but it is clearly preserved in several of the 
Harvard specimens. It is a strongly developed vein, ex- 
tending only a short distance beyond the posterior diver- 
gence of Cul. The apex of the fore wing is not pointed 
as figured by Tillyard. The apex of the left wing, on which 
Tillyard apparently based his figure, is distorted by an 
irregularity in the surface of the rock. The true shape 
of the wing is clearly shown in the right wing of the holo- 
type, as can be seen in the photograph accompanying Till- 
yard's paper (plate 4, fig. 2). 
Family Doteridae 
Fore wing: anterior margin slightly concave, the maxi- 
mum curvature near the base of the wing; costal margin 
serrated ; costal space broad basally, present along the en- 
tire anterior margin of the wing; Sc short, not extending 
as far distad as the origin of Rs ; R remote from the costal 
margin at the base, approaching nearer to it at the middle 
of the wing; R1 starts to diverge from the costa near the 
middle of the wing; pterostigma weakly developed, slen- 
derly oval ; frequently the pterostigma is bordered distally 
by a well-developed cross-vein between R1 and the anterior 
