SELLARDS. | Cockroaches. 507 
near the base. The radial, on the contrary, is very strongly 
developed, occupying almost half of the tegmina. The main 
trunk of the radius curves toward the inner border, turning 
up only at the apex. It gives off throughout its course nu- 
merous superior branches, most of which are once forked. 
These go to the costal border and the apex. The median re- 
mains simple until beyond the middle of the wing, and is ap- 
parently but slightly developed. The cubitus has simple, 
oblique, straight branches. 
This species is much like P. harei Scudder, from a lower 
horizon at Kansas City, Mo. A comparison with the type 
specimen of the latter species, however, convinces me that a 
specific difference exists between the specimens. P. radialis 
is larger, and the costal border less arched. The radial area 
has a much greater development, while the costal area is 
smaller. 
Formation and locality: Le Roy shales, Upper Coal Meas- 
ures, Lawrence, Kan. Type No. 88, University of Kansas col- 
lection. 
Etoblattina. 
Scudder, Mem. Bost. Soe. Nat. Hist., pp. 56-59, 1879. 
Btoplarina scudderi sp. nov. Pl. LXXI, figs. 3, 6; pl. LXXVIII, figs. 1, 
Large cockroaches, front and hind wings of approximately 
equal size. Costal border of tegmina gently arched. Sub- 
costal area strongly developed, reaching beyond the middle 
of the wing; branches oblique, mostly simple. Radial area 
reaching to near the apex, branching early, opposite or in front 
of the middle of the anal area. The media is less developed 
than the radius and branches later. The cubital area is long 
and narrow, its branches oblique, nearly straight, and parallel. 
The anal area is striking because of its extreme length. It 
reaches back beyond the basal third of the wing, is narrow 
and pointed. The five or six veins are mostly simple and 
parallel and nearly straight, running in a direction almost 
parallel with the long axis of the wing. All the veins of the 
tegmina are strong and large and stand out prominently from 
the wing. The impression made by the wing is of a yellowish 
brown color. 
The hind wing is thinner than the front. It is shorter, but 
with its expanded anal area nearly as broad, giving it a more 
oval outline. The costa extends as a thin vein approximately 
