S. H. SCTJDDER ON" PALAEOZOIC COCKROACHES. 03 



The front Aving is long and slender, of only slightly unequal breadth, the costal border 

 being gently convex and the inner border nearly straight until near the tip. while the tip 

 itself is well rounded. The veins originate, considerably above the middle of the base, and 

 curve somewhat so as to be subparallel at first to the costal margin. The mediastinal vein 

 is parallel to and not distant from the costal border, the area being less than one fourth 

 the width of the wing, and terminates at or a little beyond the middle of the wing, emit- 

 ting a considerable number of oblique, usually simple branches. The scapular vein is some- 

 what distant from the preceding and also runs very nearly parallel to the costal margin, 

 along the base of the anterior third of the wing, terminating just before the tip of the 

 wing ; it commences to branch just as the mediastinal commences to bend toward the 

 costal margin, and has four or five, generally simply forked, occasionally simple, branches, 

 which have a direction very similar to that of the mediastinal branches, although much 

 longer than they. The externomedian vein is rather strongly sinuate, commences to branch 

 directly opposite the first dividing of the scapular vein, and emits at rather large angles 

 four or five branches, which are usually forked once, but, in two of the specimens known, one 

 of the forks of the second branch again divides ; the branches occupy on the margin the 

 entire apex of the wing, the main vein following very closely the course of the succeeding 

 vein. The internoinedian vein is also strongly arcuate, and beyond the middle of the wing 

 assumes a more longitudinal course than before, extending the area very nearly to the ex- 

 tremity of the inner margin ; toward the base this area, with the anal, occupies more than 

 half the breadth of the wing, but it narrows rapidly beyond, and the vein emits a number 

 of branches, the basal half of which are simple, straight, oblique, and comparatively distant, 

 while the apical half of the same are simple or simply forked and considerably more longi- 

 tudinal. The anal furrow is distinct, very strongly and regularly arcuate, and terminates 

 at the end of the basal third of the wing ; the anal veins are few, simple, similarly arcuate 

 and parallel. 



The species is a comparatively small one, the front wing measuring 15-17 mm. in length 

 and 6-6.5 mm. in breadth, the breadth to the length being as 1 :2.56. Geinitz describes his 

 specimens as supplied with delicate cross-veins. 



Germar described two species under this name, which I have of course retained for that 

 bearing the earliest date, described in Minister's Beitrage. The other, described by Germar 

 in his Carboniferous fossils of Wettin, is redescribed further on under the name of Gerabl. 

 Ifiinsteri, where also the points of departure will be noted. Dr. E. Geinitz, in his fossils of 

 Weissig, has figured the present species with brief remarks, comparing it to Germar's Bl. 

 anthracophila, and giving it that name in the explanation of the plate where it is figured ; 

 the points of resemblance pointed out by Dr. Geinitz are the simple character of the basal 

 branches of the internoinedian vein, the sudden assumption of a longitudinal direction of 

 the same vein beyond the middle of the wing, and the simple character of the anal veins. 

 With Etobl. fldbellata he says it does not agree on account of the structure of the medias- 

 tinal area ; but it is evident from this remark that he has compared it, not with the true 

 Etobl. fldbellata, but with Gerabl. Munsteri, and that his comparison is, therefore, in great 

 measure justifiable. In all the points of his comparison with Etobl. anthracophila, how-- 

 veer, it agrees even better with the true Etobl. flabellata, with which it also agrees in the 

 distribution of the externomedian branches and in size, points in which it is at variance 

 with Etobl. anthracophila. Had Dr. Geinitz compared his specimen with the illustrations 



