502 University Geological Survey of Kansas. 
obtained by the writer from the Le Roy shales during the sum- 
mer of 1902, and lastly, a third lot of 109 specimens (91 cock- 
roaches) collected by the writer for the Yale Museum during 
the summer of 1903, and contained in the Yale Museum. All 
of the Permian cockroaches, with the exception of two speci- 
mens belonging to the University of Kansas, are from the 
writer’s collection of Permian insects made during the sum- 
mers of 1902 and 1903. All specimens described are referred 
by number to their respective collection. 
Three publications®® on the structure of Paleozoic cock- 
roaches, based in part on these collections, in part on collections 
from other localities, have been given out. In these publica- 
tions are described such of the new forms as are necessary to 
illustrate the structural characters discussed. Many addi- 
tional species are described in this paper. 
The Le Roy shales, from which the Coal Measures material 
comes, are placed in the Upper Coal Measures. The insects 
in this formation are found along with the plants in light- 
colored clays and shales grading into fine-grained sandstones. 
Occasionally also insects are found in the dark-colored car- 
bonaceous shales. The Wellington shales in which are found 
the later insects, are referred, on the evidence of both plants 
and insects, to the Permian, a correlation which receives un- 
qualified support from both the plant and insect fossils. The 
horizon in the Wellington holding the insect remains is a fine- 
grained limestone containing more or less silicious material. 
The rock occurs in thin-bedded, light-colored layers. Most of 
the insects have been obtained from a single locality three and 
one-half miles southeast of Banner City, in Dickinson county. 
This locality when first discovered was believed to lie in the 
Marion formation, and was so placed in the writer’s first an- 
nouncement of the discovery of the insects (Amer. Jour. Sci., 
vol. 16, p. 323, 1903). The present reference of the locality to 
the overlying Wellington is in accordance with the correla- 
tions of the Permian by J. W. Beede given in this volume. In 
addition to the Banner City locality a few insects have been 
obtained from a similar outcrop near Peabody,’ thirty miles 
south. It is not to be doubted that other localities rich in in- 
805. Some New Structural Characters of Paleozoic Cockroaches (Amer. Jour. Sci., 4th 
ser., vol. XV, April, 1908, pp. 307-315). A Study of the Structure of Paleozoic Cock- 
roaches, with Description of New Forms from the Coal ‘Measures (zbid, vol. XVIII, 
August-September, 1904, pp. 113-134, and 213-227). Geological History of Cockroaches 
(Popular Science Monthly, March, 1906, pp. 244-250). 
