MESOZOIC COCKROACHES. 455 



being about as long as the width of the wing, and lancet-shaped. The mediastino- 

 scapular vein is gently and broadly sinuous terminating a little above the very apex of 

 the wing, making the costal area broadest in the middle and a little less than two-fifths 

 the width of the wing; its branches are tolerably numerous, longitudinally oblique, the 

 basal ones simple, the others which are more oblique forked about their middle. The ex- 

 ternomedian vein forks first opposite the tip of the anal furrow, and terminates as far 

 below the tip as the upper vein above it; it has two or three simple or forked longitudi- 

 nal branches. The internomedian forks opposite the end of the humeral field and has 

 three or four more or less longitudinally sinuous branches impinging on the outer half 

 of the inner margin, which, like the costal branches, are less crowded on the margin than 

 the externomedian. The anal furrow is rather deeply depressed, strongly and very regu- 

 larly arcuate, terminating a little beyond the end of the basal third of the wing; the anal 

 nervules are parallel to it, but sinuous mesially (as if by an accident of inhumation) and 

 apically forked, terminating at equidistant points on the margin; they are about as dis- 

 tant as the costal branches. The whole wing, excepting in the basal half of the costal 

 area and of course the humeral field, shows a cross venation between the nervules, 

 breaking them into pretty regular quadrate cells. 



The length of the specimen is 12.25 mm.; probable length of wing 13.5 mm.; its 

 breadth 4.5 mm. It comes from the Lias of Brown's wood, Moreton Bagot, Warwick- 

 shire, England, and was sent me by Rev. P. B. Brodie. It is named for the present 

 director of the Geological Survey of Great Britain. The wing, which glistens a little, 

 is scarcely darker than the slate-gray stone on which it rests; the veins, which run in 

 depressions (while the intercalaries keep the ridges of the roof-like interspaces) are 

 reddish brown, interrupted frequently by obscurer portions giving them a flecked appear- 

 ance under the lens; the same is true of the cross veins in the anal area. 



Mesoblattina dobbertinensis. 



Blattina (Mesoblattina) dobbertinensis E. Gein., Zeitschr. Deutsch. geol. Gesellsch., 



1884, 570, PI. 13, fig. 1. 

 Mesoblattina dobbertinensis Scudd., Proc. Acad. Nat. Sc. Philad., 1885, 115. 



This species has been described with some care b} r Geinitz, and needs no further men- 

 tion than to say that its nearest ally appears to be M. Geikiei, a species twice as long ; 

 it differs from it also in the greater brevity of the anal area and the much greater breadth 

 and importance of the costal area. 



Its length is 6.5 mm. and it comes from the Lias of Dobbertin, Germany. 



2. The anal veins are directed toward the tip of the anal furrow. 



Mesoblattina Higginsii sp. nov. 



PI. 47, fig. 14. 



This species and the next, of neither of which is the anal area known, are placed in 

 his group because of their general relations to the species which unquestionably fall 

 here, though it may readily be found hereafter that they must be transferred to the 



MEMOIRS BOSTON SOC. NAT. HIST., VOL. III. 3 ifc^ 



