150 HH. Bolton—A New Species of Fossil Cockroach. 
its branches includes the outer two-thirds of the inner margin, and 
a small portion of the outer or tip of the wing. A slight fold 
separates the anal veins from the lowest branch of the internomedian, 
and divides off a small triangular lobe from the rest of the wing. 
The anal lobe thus formed is crossed by four anal veins which run 
parallel, and in the case of the basal two at least fork before they 
reach the margin. In the almost straight course which the anal veins 
pursue to the inner margin they are in marked contrast to those of 
EL. venusta, whilst the anal area is also much less. 
Specific Relationships.—A comparison with the tabulated specific 
characters of all known European and American Ztoblattina, shows 
that this specimen presents well-marked differences. From . mani- 
toides ' it differs in the greater length of the mediastinal vein and its 
area, in the presence of four anal veins, and in the more simple 
unbranched character of the internomedian. The differences of 
shape, size, and character of the veins when contrasted with 
£. Johnsoni, Woodward (Guot. Mae., New Ser., 1887, Dec. III, 
Vol. IV, p. 58, Pl. II, Figs. 1a—6), are still greater. It will be 
sufficient to note that the mediastinal area is almost one-half less 
than in £. Johnson’. FE. Deanensis, Scd., shows a somewhat superficial 
resemblance, but in that species the wing is narrower, and possesses 
a somewhat pointed tip in place of the well-rounded margin shown in 
our specimen. The general courses of the mediastinal and scapular 
veins are much less curved; and the latter is regularly forked, which 
is not the case in this species. The specimen, on the other hand, 
agrees perfectly with Scudder’s description of £. propria (op. cit.) in 
that the tegmina is less than twice as long as broad; the mediastinal 
area reaching nearly to the middle of the distal half of the tegmina; 
and the externomedian first forking beyond the middle of the wing. 
An examination, however, of Kliver’s figure (Paleontographica, 
xxix, pl. v, taf. xxxv, fig. 3) shows that the mediastinal area is 
longer in #. propria, and that the veins in the latter pursue a much 
straighter course. The chief difference, however, lies in the character 
of the scapular vein. In £. propria the scapular vein gives off the 
externomedian, about 8mm., above the base of the wing, whilst it is 
questionable whether these were ever united at all in the Welsh 
specimen. Unfortunately, the specimen is not sufficiently well 
preserved at the base to establish the point. Even had the two 
veins a common origin, the externomedian vein must have been given 
off from the scapular at the very base of the wing. It is, however, 
in the shorter mediastinal area, the forward curving of all the 
ultimate branches of the mediastinal and scapular veins, the more 
regular convexity of the anterior border, and the evident concave 
posterior or inner margin, that the chief differences consist, and 
constitute what may be regarded as specific identity. Further, 
Kliver’s drawing shows no trace of ‘cross-veins’, which are so 
strongly marked upon the tegmina of our specimen, the interstices 
between the veins being filled instead with a close reticulation. 
Handlirsch (‘‘ Revision of American Paleozoic Insects,” Proc. 
1 Scuddér, Mem. Boston Soc. Nat. Hist. Soc., 1879, vol. iii, pl. 1, No. 3. 
