1930 ] 
Permian Insects of Kansas 
349 
gratulated on the keenness of his observation and the 
accuracy of his conclusion. 
Family Protohymenidae 
Fore wing: costal margin very slightly convex, nearly 
straight; costal space present at very base of wing only; 
Sc rather long, extending a short distance beyond the 
origin of Rs; R close to the costal margin, except at the 
very base; R1 diverging downward distally, away from 
the pterostigma ; pterostigma very slender ; Cu straight at 
base of wing; Cul and Cu2 diverging near the base; 9-14 
cross-veins. 
Hind wing: a little shorter and broader than fore wing, 
and differently shaped; venation similar. 
Protohymen Tillyard 
Protohymen Tillyard, Amer. Journ. Sci. (5) 8 (44) : 113, 
1924. 
Fore wing; very slender, subpetiolate ; R remaining in 
contact with the costa to the pterostigma and joined to the 
costal margin by a heavy cross-vein distad of the ptero- 
stigma; Cul diverging backward directly after its origin; 
13-14 cross-veins. The positions of the cross-veins, desig- 
nated by Tillyard as generic features, are subject to great 
individual variation; but the cross-vein between 1A and 
the hind margin is always remote from the base of the 
wing. 
Hind wing: more petiolate than fore wing; Cu more 
remote from R + M at the base than in the fore wing. 
Genotype: Protohymen permianus Tillyard. 
Protohymen permianus Tillyard 
Figs. 1, 11 
Protohymen permianus Tillyard, Amer. Journ. Sci. (5) 
8 (44) : 114, 1924. 
