S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 65 



The species is of medium size, the fragment of the single front wing which is preserved 

 measuring 24 mm. ; the length of the wing is probably about 23 or 26 mm. ; the breadth 

 is 9.5 mm. in the middle, making the length to the breadth as 1 : 2.7, but the breadth is 

 probably a little greater toward the base. 



After describing this insect in Minister's Beitrage, Germar concluded that it was probably 

 the same as his Bl. anaglyptica, described in the same place, and subsequent authors have 

 accepted this assumption, apparently without any special examination of the matter, with 

 the exception of Dr. E. Geinitz, who has referred to this species a wing described by him 

 from Weissig. Etobl. anthracojphila, however, differs from Etohl. anaglyptica in several 

 important points : the mediastinal area is a little shorter; the branching of the scapular 

 vein more closely resembles that of the mediastinal, originates farther towards the middle, 

 and is less arborescent, and the distribution of the externomedian branches is less regular ; 

 besides this the shape of the wing, and especially the curve of the costal border, is very 

 different. The wing referred by Geinitz to Elobl. anthraeophila is, however, to be consid- 

 ered as belonging to Etobl. flabellata and not to this species, for the reasons mentioned in 

 the remarks here appended to the description of Etobl. flabellata. Our present species is 

 indeed closely allied to the last named, but may be separated from it by the greater breadth 

 of the mediastinal area, the approximation of the scapular to the internomedian vein, the 

 greater narrowness of the scapular area, the greater marginal extension of the externome- 

 dian area, and the more arborescent branching of the internomedian veins in the outer half 

 of the wing ; it is also considerably longer. It is also somewhat larger than Etobl. weis- 

 sigensis, which stands very close to it, and differs also by the tapering form of the wing, 

 the larger marginal area of the externomedian area, and in the branching of the veins of 

 the same area; this is both less regular and commences much further toward the base of 

 the wing ; at the same time the vein itself is much less sinuous than in Etobl. weissigensis. 



The single specimen known comes from Wettin, Germany. Upper carboniferous. 



Etoblattina weissigensis. PI. 6, fig. 5. 



Blattina weissigensis E. Gein., Neues Jahrb. f. Mineral., 1873, 692-94, taf. 3, fig. 1 ; — lb., 

 Verstein. unt. Dyas Weiss., 2-4, taf., fig. 1 ; — lb., Neues Jahrb. f. Mineral., 1875, 6 ; 

 — lb., Neue Aufschl. Dyas v. Weiss., 6. 



The front wing is long, slender and equal, the costal margin rather gently and very reg- 

 ularly convex, the inner margin straight with a very slight and very broad median excision, 

 the apex well rounded, and almost produced. The veins originate from the middle line of 

 the wing, and curve rather gently upward before assuming a nearly longitudinal direction. 

 The mediastinal is parallel to the costal margin, curving rapidly to meet it a little beyond 

 the middle of the wing ; the area occupies nearly a third of the breadth of the wing, and 

 possesses comparatively few and very distant oblique branches, most of them rather deeply 

 forked. The mediastinal vein is in close contiguity to the mediastinal, is also parallel or 

 subparallel to the costal margin, and beginning to branch where the mediastinal begins to 

 curve toward the margin, emits a considerable number (about seven) of rather crowded 

 branches, most of which are simple, gently arcuate or sinuous, and while less oblique than 

 those of the mediastinal area, are similar in distribution ; in the single specimen known the 

 first of the branches is compound, the rest simple ; the vein terminates just before the tip. 

 Beyond the basal curve the externomedian vein is straight until it branches, a little beyond 



MEMOIRS BUST. SOC. NAT. HIST. VOL. III. 



