‘SELLARDS. | Cockroaches. | 513 
strong, both twice forked. A third simple branch is given off 
beyond the middle of the wing. The radius terminates a little 
‘short of the apex. Median area also well developed. The 
main vein at the base lies close to the radius but apparently 
-does not unite with it. First branch of the media strong, two 
or three times forked. The veins of the cubital area, like 
‘those of the subcostal, are lighter and less deeply impressed 
than those of the central part of the wing. The cubitus reaches 
almost to the inner angle of the wing. The main vein gives off 
‘slender, gracefully curved branches, the first four or five of 
‘which are simple. Anal area rather long in proportion to its 
‘width; apparently easily detached. Anal veins twelve to four- 
‘teen, the first four of which occupy more than one-half of the 
area. Length of wing estimated at 19 to 20 mm.; width, 614 
‘to 7 mm. 
The cockroaches of this species are the largest yet found in 
the Kansas Permian. It seems not to have been a common 
‘species, only four specimens having come to light. The wing 
‘membrane as seen in exceptionally well-preserved specimens 
is finely reticulated. Three of the specimens are preserved in 
‘flinty and very hard limestone, the fourth in the ordinary 
limestone. 
Formation and locality: Wellington shales, Dickinson 
county, Kansas. Types in the University of Kansas collec- 
‘tion, and No. 1001 of the author’s collection. 
‘Etoblattina curta sp. nov. Pl. LXXIII, figs. 1, 4. 
Wings of medium size, broad in proportion to their length; 
apex rounded. Veins at the base of the wing clearly dis- 
tinct; subcosta reaching to or beyond the middle of the wing; 
‘branches oblique; radius reaching hardly to the apex; four 
-or five superior branches, the second forked, others usually 
simple; median area large, branches parallel, simple to near 
‘their tip; cubitus long, strong at the base, fading out towards 
‘the tip; first four basal branches simple, strong, and deeply 
impressed in the wing membrane, the following four or five 
‘branches indistinct. Length estimated at 13 to 15 mm.; width, 
414 to 5 mm. 
Ten specimens are referred to this species. The wide sepa- 
‘ration of the main veins at the base distinguishes the species 
from most of the other Permian forms. The radius of No. 8 
_has five superior branches; that of No. 111 has only four; the 
