468 SAMUEL II. SCUDDEE ON 



color, veins and all, as the dirty, chalky-white stone on which it rests, the veins being 

 slightly impressed <>n the summits of rounded ridges separated by transversely rounded 

 furrows. The mediastino-scapular vein is straight in the basal half of the wing; beyond 

 curves slightly and probably terminates a little above the tip with, so far as can be seen, 

 only simple or basally forked, parallel, oblique, scarcely sinuous branches, the costal 

 area being slightly less than two-fifths the breadth of the wing. The externomcdian 

 and internomedian veins are strongly arcuate at the extreme base; beyond completely 

 longitudinal in the externomedian area, probably terminating in a narrow space at the 

 extreme tip of the wing, and the same, but slightly declivous, in the internomedian area, 

 where from this cause they terminate along the entire inner margin, even within the 

 basal half of the wing; in the median areas, the interspaces arc generally seen to be 

 broken by dull cross veins into quadrate cells, but near the middle of the wing both 

 veins and cross veins are effaced by imperfect preservation. The anal furrow is trans- 

 versely oblique with no distinction of impression and must terminate at a very short dis- 

 tance out. The species is remarkable for the straightness and simplicity of its costal area, 

 the early termination of its earlier internomedian nervules and its uniform breadth. 



Length of fragment, 7.5 mm.; probable length of wing, 14 mm.; breadth, 4.5 mm. 

 The specimen was received from Rev. Mr. Brodie, as from the English mesozoic beds, 

 but without further indications. It is named for Mr. J. ~W\ Kirkby, who has made us 

 acquainted with some of England's earliest fossil cockroaches. 



Elisama ? media. 



Blattidium medium Ileer, Viertelj. naturf. Gesellsch. Zurich, ix, 289, 300, PI. fig. 7. 



An obscure and imperfect specimen, which agrees better with this genus than any 

 other and probably belongs here and to a species distinct' from any others known, being 

 distinguished for its tapering form, its straight inner margin, while the costal margin is 

 convex, the regular narrowing of its costal area, which is broadest close to the base and 

 which probably terminates at the very upper extremity of the apex, its intercalary veins 

 and the complete longitudinality and straightness of its median veins. 



Length of fragment, 8 mm.; probable length of wing, 10.25 mm.; breadth, 3.5 mm. It 

 comes from the Lias of Schambelen, Switzerland. 



b. Tlie externomedian vein of tin upper wings is amalgamated either 

 with the scapular or with the internomedian, and cdl 



other veins are independent. 



PTEIUXOBLATTIXA Scudder. 



Pterinoblattina Scudd., Proc. Acad. Nat. Sc. Philad., 1885, 105. 



Among the fossil cockroaches figured by Westwood thirty years ago, was one which 

 Giehel afterwards named Blatta pluma, on account of the resemblance of its neuration 

 to the barbs of a feather, with the shaft on one side. Several species are now known, 

 including one described as an hemipteron by G'ermar nearly fifty years ago, and on 



