S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 73 



branch probably belongs accordingly to the scapular vein. Supposing this to be so, the 

 scapular area is very extensive, terminating probably at or scarcely above the tip of the 

 wing, and occupying in the middle of the wing nearly half its width ; the vein branches 

 very near the base, and each branch divides dichotomously several times, sending forth 

 longitudinal shoots, which in the upper branch at least show, by a certain obliquity, signs 

 of a similarity to the veins of the mediastinal area. The externomedian vein branches 

 dichotomously like the lower branch of the scapular vein, commencing a little before the 

 middle of the wing; the branches approximate, at least at first, but afterwards probably 

 spread in more or less of a fan shape. The internomedian vein is gently oblique and very 

 slightly sinuous, and, to judge by its assuming toward the end of the fragment a more 

 longitudinal direction, probably terminates far out on the inner margin toward the tip of 

 the wing, the area occupying nearly half the breadth of the wing at the middle ; it emits a 

 number of parallel, oblique, forked, rather distant branches. The anal furrow is strongly 

 and regularly arcuate, terminating at not far from the end of the basal third of the wing; 

 the anal veins are rather numerous, sul (parallel, nearly straight and usually forked, the 

 forks sometimes terminating on the neighboring veins or on the anal furrow, and so pre- 

 senting a confused appearance. 



In addition the wing is described as having the front margin produced and 

 flattened. The fragment is nearly 11 mm. long, representing a wing of com- 

 paratively small size, probably about 18 mm. long; the breadth is about 8 mm. ; 

 the restored portion in the plate is represented as much too short, the breadth 

 to the length being about as 1 : -.25. The annexed cut is more nearly correct 

 in this particular. Besides the single specimen described, another fragment, 

 showing one or two veins only, occurred with it, and probably belongs here, 

 for both are similarly marked by a fine and irregular reticulation. mantidioides. 



If we have correctly interpreted the parts of this wing, the species is somewhat closely 

 allied to Etobl. carbonaria, although certainly distinct from it by the brevity of the medi- 

 astinal area and the different distribution of the branches of the scapular vein. In the 

 brevity, although not in the width of the mediastinal area it approaches Etobl. leptophlebica, 

 but the wing does not appear to be so slender, and the distribution of the branches of the 

 scapular vein is again different; from Etobl. russoma, with which it agrees in general 

 features, it differs in its smaller size and the brevity of the mediastinal area; while from 

 Etobl. flab ellata, with which it agrees very well in the extent of the mediastinal area, it 

 differs by the very different distribution of the branches of the externomedian vein. 



The single specimen came from " the north bank of the Wear, opposite to Claxheugh, 

 about two miles from Sunderland," Durham, England; from "very near to the top of the 

 coal-measures, as developed in Durham." Upper carboniferous, according to the recent 

 classification of Hull. 



Etoblattina carbonaria. PL 2, fig. 3. 



Blafthia carbonaria Germ., Verst. Steink. Wettin, vii, 85-86, tab. 31, figs. 6 a , 6 1 ' ; — Gieb., 

 Ins. Vorw., 315; — Heer, Viertelj. naturf. Gesellsch. Zurich, ix, 287, No. 3 (not 288, 

 No. 15); — E. Gein., Neues Jahrb. f. Miner., 1875,5; — lb., Neue Aufschl. Dyas v 

 Weiss., 5; — Gold., Faun, saraep. loss., ii, 19, No. 3 (not 20, No. 34). 



The front wing has a somewhat obovate form, the costal border being very regularly and 

 rather strongly convex ; the tip is broken in the single specimen known, and the inner 



MEMOIRS BOST. SOU. NAT. HIST. VOL. III. 1° 



