1930 ] 
Permian Insects of Kansas 
353 
not well preserved in the Yale material, but in several 
of the new fossils it is very clear; it does not extend to 
the pterostigma as thought by Tillyard. The pterostigma 
is also differently formed than shown in his figure; the 
photograph accompanying his paper (plate 4, fig. 1) dem- 
onstrates clearly the true nature of this structure. The 
costa and R1 widen slightly in the region of the ptero- 
stigma, so that there is no space formed between these 
veins until R1 diverges towards the apex. R1 appears to 
fork here, but in reality, as I shall show later, the upper 
“branch” which connects R1 to the margin is a modified 
cross-vein. There is considerable variation in the distri- 
bution of the cross-veins, and sometimes a cross-vein may 
be absent altogether or an extra one added. The holotype 
specimen has two cross-veins between 1A and the hind 
margin, but all the other specimens I have seen possess 
only one here. The short vein, resembling a cross-vein, 
between the base of Cul and R + M is apparently the basal 
part of MP. 
Protohymen elongatus n. sp. 
Fig. 2 
Fore wing: length, 20 mm.; width, 3.5 mm.; extremely 
slender and pointed; R1 separating from the costa at the 
beginning of the pterostigma, so that there is a distinct 
space between these veins in the region of the pterostigma 
(text fig. 1) ; Cul diverges upward after its separation 
from Cu2, and touches R + M ; Cu2 only very slightly undu- 
lated; cross-veins distributed essentially as in permianus, 
but the one between 1A and the hind margin is attached 
to the middle part of the anal vein. 
Holotype: No. 3069ab, Museum of Comparative Zoology; 
F. M. Carpenter, collector. 
This species is based on a well-preserved and nearly 
complete fore wing. The only part missing includes the 
area between the terminations of MP and Rl, along the 
posterior border. Elongatus can readily be distinguished 
from the previous species by its more slender habitus and 
the corresponding tenuity of the veins. 
