66 S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 



the middle of the wing ; beyond this it emits two or three sometimes forking branches, 

 which are longitudinal and nearly approximated, so that the marginal extent of the area is 

 very slight, occupying only the very tip of the wing. The internomedian vein, running con- 

 tiguous witJi the preceding in the basal curve, parts rather rapidly from it, being directed 

 at lirst toward the middle of the outer half of the inner border in a nearly straight course, 

 until opposite the branching of the externomedian vein, when it assumes a slightly arcuate, 

 longitudinal direction, and terminates just behind the tip of the wing; in the middle of the 

 wing it is therefore very distant from the externomedian vein, which it afterwards rapidly 

 approaches ; in the basal portion, the distribution of the veins is very similar to that of the 

 scapular area, but they are distant ; beyond they are more frequent and arborescent, the 

 branch originating at the point of change in the main vein, emitting a compound branch- 

 let, which repeats the distribution of the branches of the main vein beyond it. The anal 

 furrow is distinct, strongly arcuate, somewhat bent in the middle, rather distant from the 

 internomedian vein and its first branch, and terminates at the end of the basal third of the 

 wing ; the anal veins are frequent, simple, arcuate and parallel to the furrow. 



The wing is of rather small size, being 19 mm. long, and 6 mm. broad, or the breadth to 

 the length as 1 : 3.17 ; the veins of the middle of the wing are very sharply defined, and 

 the surface is delicately granulate. 



Dr. Geinitz compares this species with Etobl. anaglyptica and Etoibl. lepiophlebica, and 

 in a secondary way with Bl. affinis. It is indeed related somewhat closely to these species, 

 and especially to the first named, and in form resembles best, though not very well, the 

 two last named ; but in essential features it has closer affinities with Etobl. anthracophila, 

 which is somewhat larger than it, and is otherwise distinct from it by its general form and 

 by the distribution of the branches of the externomedian vein, which divides much nearer 

 the base, and occupies a larger marginal area than in Etobl. anthracophila ; the branches 

 of the basal portion of the internomedian vein are also much closer together in the same 

 species. 



The single specimen described by Geinitz came from Weissig, Saxony. Lower Dyas. 



Etoblattina Dohrnii. PL 2, fig. 5. 



Blattina euglyptica pars Gold., Neues Jahrb, f. Mineral., 1869, 162-63, taf. 3, fig. 8 (nee 9). 



Not Bl. euglyptica Germ. 

 Compare also synonomy of Gerabl. producta. 



The front wing is of a very regular shape, the tip being well rounded, and the upper 

 and lower halves almost exactly -alike in form, the costal and inner borders gently convex; 

 the wing is largest in the middle, scarcely tapers toward the base, but more rapidly toward 

 the tip, and especially near the apex. The veins originate together considerably above the 

 middle of the wing, and have scarcely any, if any, basal curve. The mediastinal vein is 

 straight, and terminates a little short of the extremity of the middle third of the wing, 

 and emits, mostly from near its origin, half a dozen very long and unusually longitudinal 

 simple veins ; next the base the area occupies nearly one-third the breadth of the wing, 

 and it tapers very gradually on its apical half. The scapular vein is also nearly straight, 

 curved upward toward the costal margin only near the tip. and terminates just before the 

 ;i|«'X of the wing; it runs parallel to the costal margin along the middle of the anterior 



