528 University Geological Survey of Kansas. 
with sterna more pointed than are those of the FE. juvenis 
type. The legs are strong, as indicated by the femur. The 
wings are long in proportion to their width. Traces only of 
the wing venation have appeared. It is quite possible that 
these large nymphs are the young of the large species de- 
scribed as Htoblattina scuddert. 
Spiloblattina sp. Pl. LXXII, fig. 1. 
A few specimens from the Le Roy shales are apparently re- 
ferable to the genus Spiloblattina. These are of interest on 
account of the light they throw on the body structure of this 
genus. The ovipositor is preserved on one of these nymphs 
and is seen to be much shorter than is the ovipositor of any 
of the Htoblattina species. It is slender and projects only 
slightly beyond the end of the abdomen. The body as seen in 
these specimens is, like the wings, light-colored, in contrast 
to the usual brown or dark color of E'toblattina. 
Formation and locality: Le Roy shales, Upper Coal Meas- 
ures, Lawrence, Kan. 
The generic reference of the small nymph of figure 23, plate 
LXXV, is in doubt. The abdomen has been slightly crushed, 
but the ten segments can be made out. A few of the sterna are 
seen in outline through the terga and are pointed at their 
posterior corners. A tibia, tarsus, and part of a femur lie in 
front of the pronotum. The number of segments of the tarsus 
cannot be made out, but the claw terminating the foot is pre- 
served. A second specimen of about the same size is illus- 
trated by figure 2, plate LX XII. 
Formation and locality: Le Roy shales, Upper Coal Meas- 
ures, Lawrence, Kan. 
The rounded pronotum of figure 24, plate LX XV, represents 
evidently still another type of nymph. Its generic reference 
is in doubt. The pronotum of Schizoblattina is unknown, 
while some species of Htoblattina have during their early 
stages a circular pronotum. 
No less than twelve specific types of hind wings are recog- 
nized in the collections; six from the Coal Measures and six 
from the Permian, each represented by one or more well-pre- 
served specimens. Such of these as can be connected with 
their respective front wings have been described with the 
tegmina. Those which are not associated with the front wings 
are described briefly. | 
