SELLARDS. | Cockroaches. 523 
also curved and lies close to the radius. Its first branch is 
given off beyond the middle of the wing. The cubitus, like the 
media and radius, is very strongly arched and comes to the 
inner border only a little beyond the middle of the wing. Its 
five or six branches are simple, parallel, very oblique. The 
anal area is elongate-pointed behind. Of the six or seven 
veins the third in the type specimen is forked at a wide angle. 
The type specimen of this species has suffered distortion as it 
lies in the matrix, thus accentuating the natural curve of the 
wing. Estimated length of the wing, 23 to 25 mm.; breadth, 
8 mm. 
Formation and locality: Le Roy shales, Upper Coal Meas- 
ures, Lawrence, Kan. Type, No. 56, University of Kansas col- 
lection. 
Spiloblattina laxa sp. nov. 
Tegmina thin, uniformly rounded. Subcostal area narrow, 
but long, extending much beyond the middle of the wing. Sub- 
costal branches several, simple, oblique. Radius divided near 
the middle of the wing, the two divisions again forked and 
running to the border above the apex. The branches of the 
media fill the apex. The tip only of the cubitus is seen in the 
type specimen. It extends well onto the apical border. Its 
distal branches, like those of S. maledicta, are very oblique. 
The broad, thin tegmina have much the appearance of: hind 
wings, lacking entirely the rigidity that usually characterizes 
tegmina. Length of tegmina estimated at 17 to 19 mm; 
breadth, 7 or 8 mm. 
At the same locality is found a hind wing which, from its 
lax apearance and resemblances in venation, not improbably 
belongs with the front wing. The subcosta of this hind wing 
is also long, reaching two-thirds the length of the wing. The 
radius is very similar to the radius of the front wing, divides 
early, both divisions again soon branched. The media occupies 
more area than the radius. Its first branch is compound and 
runs to the apex. The other branches end on the inner border. 
The cubitus is short and weak and has only about three thin 
branches. The first anal vein is forked. The anal area beyond 
is crumpled up in the type specimen—apparently there are a 
few longitudinal veins. A dark area similar to that of the 
tegmina accompanies the subcostal. The hind wing as a whole 
