Scudder.] 
894 
[February 1 
which, are perhaps divided just above the tip, much as in the front 
wing ; this would also give them the same general trend in both 
wings. There is the same cross venation but exceedingly indis- 
tinct. 
In addition to these wings we have the larger part of the pro- 
notum in place relatively to the closed wings ; the hinder part is 
broken but the front is perfect and very regularly and strongly 
rounded with a very minutely marginate edge ; from a fragment 
of the middle of the hind margin the size can be given and it 
appears that this margin was gently convex, perhaps a little bent 
in the middle ; it is nearly flat being very slightly domed and 
presents a broad median sub triangular ' depression between two 
slight distant converging ridges, showing a tendency to run to- 
gether in front ; otherwise the surface is as smooth as the scapular 
angle of the front wings. Length of the pronotum 8 mm., width 
of same 10 mm. 
The specimen is not quite so complete as it was; one side shows 
all the wings, but the part of the stone in front is not preserved 
with it; the opposite is composed of two pieces, and if the third 
piece broken out from it were present would exhibit the entire 
fossil. The entire length is 29 mm., the width across the closed 
wings 18 mm. 
This species is most nearly allied to the European E. car- 
bonaria, E. didyma and E. russoma, and to the American E. 
venusta. Its place in the series described in my Palaeozoic cock- 
roaches would probably be between E. didyma and E. russoma. 
Although very closely allied both to E. carbonaria and E. russoma, 
and although some of the points of difference supposed to dis- 
tinguish those species from each other are shown by the compar- 
ison of wings of opposite sides in this specimen to be valueless, it 
is nevertheless pretty clearly distinct from both. 
It differs from E. venusta, its nearest American congener, in 
its smaller size, the less strongly arcuate costal margin, the 
much less numerous mediastinal branches, the upward sweep of 
the scapular branches, and their more clearly superior emission, 
and the different kind of transverse reticulation. From E. 
didyma it is at once distinguished by its very much smaller 
size ; the wing of our species is also much slenderer and has prob- 
