510 University Geological Survey of Kansas. 
to one-half the length of the costal border and giving off a 
variable number of very oblique, mostly simple, branches. Ra- 
dius also variable in extent, falling somewhat or consider- 
ably short of the apex. The first radial branch is given off 
from 314 to 7 mm. from the base. The media branches before 
reaching the middle of the wing, its several oblique divisions 
filling the apex. The cubital area extends two-thirds to three- 
fourths the length of the inner border, its six to eight branches 
simple or once forked. The anal area is strongly marked and 
the veins numerous. The species resembles H. communis, a 
very abundant species in the Permo-Carboniferous of Cassville, 
W. Va., but there is a constant difference in the extent of the 
subcosta, which, although variable in the Kansas species, is 
always shorter. 
This is one of the very common species of the Lawrence 
shales. Fourteen specimens are referred to it. The tegmina 
are variable in the relative extent of the main veins and their 
branches as well as in the number of branches. They are con- 
stant, however, in the thick and dark membrane, and in the 
arched form with rounded apex. The variation in size is 
slight. Specimen No. 119, University of Kansas collection, 
may be taken as typical, the shape and venation of the wing 
being that characteristic of the species. No. 156 of the same 
collection has the two tegmina preserved. The radial areas 
of the two front wings differ slightly in their method of fork- 
ing. The pronotum, as seen in specimen No. 129 of the Uni- 
versity of Kansas collection, is of the normal rounded Htoblat- 
tina type. 
Formation and locality: Le Roy shales, Upper Coal Meas- 
ures, Lawrence, Kan. University of Kansas collection, Nos. 
43, 68, 87, 119, 149, 156, 172, 191, 199, and 204; No. 75 of the 
Yale collection; and Nos. 13 and 59 of the author’s collection. 
Etoblattina savagi sp. n. Pl. LXXI, fig. 4; pl. LX XXII, fig. 1. 
Medium-sized cockroaches with broad front wings. Costal 
border of tegmina regularly and strongly curved, inner border 
straight as far as the apical margin, apex placed on about the 
middle line of the wing, obtusely pointed. Subcostal area 
short, not reaching to the middle. Radial area broad and occu- 
pying over two-fifths of the width of the wing. The first 
branch is given off opposite the end of the anal area, is soon 
forked, both branches again widely forked, all the divisions 
running to the costal border at a steep angle. The second 
