SELLARDS. | Cockroaches. 519 
branches of the subcosta and fewer cross-veins, and from both 
S. multinervia and S. minor in the cubitus, in which the dichot- 
omous character is lacking, while inferior branches are given 
off. 
Formation and locality: Le Roy shales, Upper Coal Meas- 
ures, Lawrence, Kan. Type, No. 72, Yale collection. 
Spiloblattina. 
Seudder, Proce. Acad. Nat. Sei. Phila., p. 35, 1885. 
The genus Spiloblattina was based originally on material 
from Fairplay, Colo. The essential characters of the genus 
are the wide divergence of the radius and media and of the 
media and cubitus and their subsequent convergence to enclose 
an elongate area, the stigma. The tegmina are thin and 
marked with light and dark areas, while dark bands accom-: 
pany the veins. The hind wings, and body as well, are like- 
wise variegated, showing light and dark areas. It appears 
also from material from the Kansas Coal Measures that the 
- Ovipositor of the female is much smaller than that of Htoblat- 
tina, projecting but little beyond the end of the abdomen. The 
Fairplay deposits from which the genus was described are of 
doubtful position, having been referred by some to the Per- 
mian, by others to the Triassic. In the Kansas deposits the 
genus is seen to extend as far down as the Coal Measures. It 
is found also, according to the writer’s determinations, in the 
Coal Measures of Ohio, Scudder’s species Htoblattina male- 
dicta being referred, as seen below, to this genus. 
Spiloblattina maledicta. Pl. LX XVI, figs. 26, 27; pl. LX XVII, figs. 6, 8; 
pl. LXXX, fig. 1. 
Etoblattina maledicta Scudder, Bull. U. S. Geol. Surv., No. 124, 
p. 83, ple.6; fies: 1-38) 11895. . 
Etoblattina benedicta Scudder, ibid., p. 84, pl. 5, figs. 14, 15. 
Spiloblattina maledicta Scudder sp. Sellards, Amer. Jour. Sci., 
vol. 18, pp. 214-216, text figs. 26, 27; pl. 1, figs. 5, 6, 10, 1904. 
Tegmina narrow, two and one-half times as long as broad, 
costal border slightly arched, inner border nearly straight; 
tegmina broadest at the extremity of the anal area, apex ob- 
tuse. Subcostal area narrow, extending a little beyond the 
middle of the tegmina; branches mostly simple and oblique. 
The radius reaches nearly to the apex. The first branch is 
given off at about the extremity of the basal third, sometimes 
as early as the end of the basal fourth, and is usually twice 
forked. Three or four other simple or deeply forked branches 
pass to the border. The media gives off its first branch some- 
