524 University Geological Survey of Kansas. 
is flat and weak. Length, probably 17 or 18 mm.; width, 814 
to 9 mm. 
Formation and locality: LeRoy shales, Upper Coal Meas- 
ures, Lawrence, Kan. Type, No. 171, University of Kansas 
collection. | 
Hznoblattina en. nov. 7 
Medium-sized, thin-winged cockroaches. Veins of the teg- 
mina few, branching at wide angles. 
The two species referred to this genus are in important re- 
spects unlike any of the associated forms. The tegmina lack 
the strongly arched costal border of most cockroaches. The 
radius, media and cubitus divide apparently by dichotomy 
rather than by the usual method of giving off branches. The 
anal area of the type species apparently gives off from the first 
anal vein one or two branches which run to the anal furrow. 
The cubital vein is not well preserved but appears to resemble 
closely the typical cubitus as seen in many insects other than 
cockroaches, divided into two parts, each of which are again 
branched. 
Hznoblattina tenuis sp. nov. Pl. LXXI, fig. 1. 
Cockroaches of medium size with thin, broad, few-veined 
wings. Tegmina almost three times as long as broad. Costal 
and inner borders nearly straight, apical border thin and 
wavy, apex obtusely rounded. Wing broadest back of the 
middle. Subcostal area narrow, the main vein straight, hardly 
reaching the middle. Branches few and oblique. The radius 
extends to and occupies part of the apical border. A few 
superior branches are given off, the first of which arises near 
the end of the anal area. An inferior branch also arises from 
the radius in front of the middle, and continues straight and 
simple through the middle of the wing to the apical border. 
The first median branch is given off somewhat in advance of 
the middle, soon branches, the upper division being again 
forked. The main vein continues in a sinuous course to the 
inner border, giving off about two other branches. The cu- 
bital area is narrow and has only about three oblique branches. 
The anal area is long, but narrow, and has only a few veins. 
Two thin branches seem to take their origin from the first anal 
vein and run toward the anal furrow. The basal part of the 
wing has suffered from lateral crushing, which makes it ap- 
