S. H. SCUDDER OX PALAEOZOIC COCKROACHES. 69 



various areas, but the shape of the wing differs considerably, and the branches of the medi- 

 astinal vein arise at equal distances all along the principal vein ; the anal area too is larger 

 and more crowded with veins. From Etcibl. anaglyptica, to which it is closely allied, it may 

 be distinguished by the brevity, slenderness, and diminishing extent of the mediastinal area, 

 as well as in the later division and more longitudinal direction of the externomedian vein. 

 In the characteristics of the mediastinal and scapular areas and their relations to each other 

 it resembles both Etobl. affinis and Etobl. fldbellata, but it differs from both in the more 

 apical division and different distribution of the externomedian branches. Finally it is read- 

 ily distinguishable from the other American species of this genus, Etobl. venusta, in the 

 nature of the mediastinal area, and the less arborescent distribution of the branches of the 

 scapular vein. 



The single specimen known was obtained by Mr. R. D. Lacoe ; it is preserved on a 

 piece of carbonaceous shale picked up near Pittston, Penn., in a pile of culm, and is con- 

 sidered by him as doubtless coming from the roof shales of the D seam of anthracite (of 

 Prof. Lesley's classification). Middle carboniferous. 



Etoblattina anaglyptica. PI. 2, fig. 15. 



Blattina anaglyptica Germ., Miinst. Beitr. z. Petref., v. 92, taf. 13, fig. 2; — lb., Verst. 

 Steink. Wettin, vii, 84, tab. 31, fig. 4 ; — Gieb., Deutschl. Petref, 637 ; — lb., Ins. Vorw., 

 314-15; — Heer, Viertelj. naturf. Gesellsch. Zurich, ix, 287; — Gold., Faun, saraep. 

 foss., ii, 19. 



Compare also the synonymy of Etobl. anthracophila and E. labachensis. 



The front wing is long and tolerably slender, the costal border strongly arched, while 

 the inner border is straight; the tip is broken, but is probably well rounded. The veins 

 originate at some distance above the base, and probably curve upward a little x at first. 

 The mediastinal area is very narrow, occupying not more than one-quarter the breadth of 

 the wing, the vein running subparallel to the margin and terminating beyond the basal 

 three-fifths of the wing ; it emits a large number of rather closely approximated oblique 

 branches, mostly simple, occasionally forked. The scapular vein is somewhat distant from 

 the mediastinal, and has a broadly sinuate course, terminating shortly before the apex of 

 the wing ; in the middle of the wing the area occupies considerably more than one-third of 

 its entire breadth, and, commencing to branch as far back as the end of the basal third of 

 the wing, it emits three or four, mostly forked, sometimes doubly forked branches, having a 

 direction very closely parallel to the branches of the mediastinal vein. The externomedian 

 vein, beyond its basal curve, is very nearly straight, and terminates at the extremity of 

 the inner margin, so that just the whole apex of the wing is occupied by the externo- 

 median area; it commences to branch at some distance beyond the preceding vein, but 

 still much before the middle of the wing, and emits three lon°-itudinal branches, each of 

 which forks nearly opposite the origin of the terminal branch of the scapular vein, and 

 most of the forks again divide halfway to the tip, the whole being very regularly disposed. 

 The internomedian vein follows the straight course of the externomedian to a short dis- 

 tance beyond the middle of the wing, the area thus rapidly narrowing, and then takes a 



1 This does not appear so well iu our plate as in the representation by Germar in his Wettin fossils. 



