534 University Geological Survey of Kansas. 
Permian genera and species. 
Etoblattina permiana sp. nov. Ktoblattina sp. (hind wing). 
Etoblattina curta sp. nov. Etoblattina sp. (hind wing). 
Etoblattina pecta sp. nov. Puknoblattina compacta sp. nov. 
Etoblattina sp. (hind wing). Puknoblattina sp. (hind wing). 
Etoblattina sp. (hind wing). Puknoblattina curvata sp. nov. 
Etoblattina sp. (hind wing). 
GEOLOGICAL RELATIONS OF THE KANSAS UPPER PALEOZOIC 
COCKROACHES. 
Le Roy Shales.—Of the eight genera of cockroaches recog- 
nized in the Le Roy shales, three, Mylacris, Promylacris, and 
Archimylacris, are, so far as known, confined to the Coal 
Measures, and are best developed in the Lower and Middle 
Coal Measures. Two of the eight genera, Htoblattina and 
Gerablattina, are known to occur in both the Coal Measures 
and the Permian. One genus, Spiloblattina, has not previously 
been recorded as occurring in deposits as old as the Coal Meas- 
ures. Some specimens from the Ohio Coal Measures pre- 
viously referred to E'toblattina are, however, placed in Spilo- 
blattina. The remaining two genera, Schizoblattina and Hno- 
blattina, are described as new from these deposits. To Schi- 
zoblattina, however, is referred a species, Neorthoblattina 
albolineata of Scudder, previously described from Fairplay, 
Colo. (Supposed Trias or Permian.) 
It is thus seen that, so far as an enumeration of genera is 
concerned, there is in the Le Roy shales, along with typical 
Coal Measure forms, a mingling of genera which reached their 
greatest development in early Coal Measures, with others tak- 
ing their origin during late Coal Measure time and reaching 
into the Permian. ‘The three older genera are represented by a 
single species each. EHtoblattina, which is recognized as reach- 
ing its greatest development during Upper Coal Measure and 
Permian time, is represented by seven species, while Spilo- 
blattina, an Upper Coal Measure-Permian genus, has four spe- 
cies. Of the two new genera, Hexnoblattina is represented by 
two species and Schizoblattina by three. By far the greater 
number of individuals belong to Etoblattina and Spiloblattina. 
The species obtained from the Le Roy are with two exceptions 
new and are of types commonly found in Upper Coal Measure 
deposits. 
The Wellington Shales.—Two genera are recognized in the 
