S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 67 



two-thirds of the wing, commences to divide before the middle of the wing, and emits only 

 two or three simple or forked branches, having the course of the apical branches of the 

 preceding vein! The externomedian vein takes a straight course nearly down the middle 

 line of the wing, does not divide until past the centre, and then emits two or three com- 

 pound or forking branches, which spread at a considerable angle and occupy the entire 

 apex of the wing. The internomedian vein, scarcely arcuate throughout most of its 

 course, and slightly more longitudinal toward the extreme tip, terminates on the inner 

 margin just before the apex, opposite the extremity of the scapular vein, and emits only a 

 few rather distant straight or occasionally forked branches. 1 The anal furrow is not very 

 strongly arcuate, and terminates at about the end of the basal two-fifths of the wing ; the 

 anal veins, about five in number, are rather distant, similarly or less arcuate, mostly simple, 

 or when forked, but slightly so. 



The wing is of medium size, measuring about 26 mm. in length, and 10.5 mm. in 

 breadth ; or the breadth to the length is as 1 : 2.5. 



The wing is peculiar for its symmetry of form, and the straightness and longitudinality 

 of the veins, and particularly for the very longitudinal direction and basal attachment of the 

 veins of the mediastinal area. It is not very closely allied to any species ; from the true 

 Etdbl. euglyptica, which Dr. Goldenberg considered it to be, it differs in form and size, and 

 in the branches of the mediastinal area ; from Gerabl. producta, which Goldenberg placed 

 in the same species, it differs in the brevity of the mediastinal area and the nature of the 

 branches in the same, in the origin of the division of the externomedian vein, and in the 

 gradual narrowing of the internomedian area. It is perhaps most nearly allied to Etobl. 

 iveissigensis and Etobl. anthracophila ; from the former it is sufficiently distinguished by its 

 form, as well as by the distribution of the apical branches of the internomedian area, and 

 the great length of the branches of the mediastinal vein ; from the latter by the nearly 

 uniform breadth of the wing and the same peculiarities of neuration. I have placed the 

 American Etobl. Lesquereuxii beside it, but it is not very nearly related, the branches of 

 the mediastinal and also of the anal area being very different, while the whole wing in 

 Etobl. Lesquereuxii is larger and much less bilaterally symmetrical. 



A single specimen is known, and was found at Wettin, Germany. Upper carboniferous. 



Etoblattina Lesquereuxii nov. sp. PL 6, figs. 3, 4. (See also figure in text below.) 



Front wing. This is long and slender, the costal margin very uniformly and consider- 

 ably convex, the inner margin straight or scarcely convex, the whole wing nearly equal, 

 the apical fifth tapering, the tip well rounded. The veins originate at about the middle line 

 of the wing, the mediastinal and the united anal and internomedian in rather prominent 

 ridges, the scapular and externomedian in a furrow between them ; all together curve 

 upward at first before assuming a more longitudinal direction, so that at the parting of the 

 anal and internomedian veins, the anal area has more than half the width of the wing. 

 The mediastinal vein runs subparallel to the costal margin, but continually and very grad- 

 ually approaches it, much as in Etobl. Dohrnii, striking it at an unusually slight angle at a 

 point a little beyond the middle of the wing ; it emits about nine equidistant, and rather 



1 In my plate the anal furrow is incorrectly represented as one is the anal furrow, so that there is one less vein in the 

 being a forked vein ; in reality the vein following the forked internomedian area than is represented. 



