1882 .] 
393 
[Scudder. 
simple, the outer half curved in the same sense as, but in an 
increasingly less degree than, the anal furrow, the basal ones in. 
the opposite sense ; in the specimen the left wing, which has 
usually had the greatest number of veins, has here only six, 
while the right has eight. 
The wing is rather above the medium size, being 24 mm. long, 
and 9.5 nnn. broad, the breadth being to the length as 1 : 2.53 ; 
it is tolerably flat, with a broad costal belt including all the 
mediastinal, and, apically, a part of the scapular area depressed 
below the rest ; the scapular vein is very prominent at the base 
and there are faint dull radiating ridges over the scapular area at 
the very base ; the anal furrow is deeply impressed, especially in 
its basal half. The specimen exhibits an upper surface of the 
closed wings (aiid its cast) with the veins delicately impressed, 
and in certain lights over the whole surface of the wing, except- 
ing in the mediastinal area, delicate straight raised cross veins at 
right angles to the nervules, rather distant and breaking up the 
interstices into quadangular cells longer than broad or square. 
Besides the front wings, which lie in the natural position of 
repose, a portion of the hind wings can be seen where the front 
wing has flaked off, especially at the apex of the right side where 
perhaps a fifth of the hind wing can be seen. This fragment 
shows that, as appears to be usually the case in paleozoic cock- 
roaches, the hind wing closely resembled the front wing in form, 
size and neuration, as well as in the integument itself, the 
distinctness of the veins indicating an equally membranous 
character in each. In this species it would appear that the hind 
wing was slightly shorter, reaching posteriorly the same point, 
slightly (perhaps only correspondingly) narrower, and differed in 
shape so far as to have a nearly straight costa, with the apex of 
the wing not in the middle line, as in the front wing, but in the 
middle of the upper half ; the costal margin begin ning to curve 
downward only in the apical eighth or ninth of the wing, while 
the margin must curve from a more distant point. The venation 
at the apex of the wing appears to be more ci owded and more fre- 
quently forked than on the front wing, but it is impossible to sep- 
arate the branches of the different stems ; it would appear probable 
that all we see belong to the scapular and externomedian .veins, 
