70 S. II. SCUDDER ON PALAEOZOIC COCKROACHES. 



longitudinal course, reaching the margin only far toward the apex; before this turn in its 

 direction, the vein emits three or four straight branches, most of which are simple, but the 

 last one emits on the outer side a compound branch somewhat similar to the arborescent 

 division of the main stem at its bend, which fills the apical half or more of the area with 

 dichotomizing veins. The anal furrow is distinct, strongly and regularly arcuate, termi- 

 nating near the end of the basal third of the wing ; on account of the anterior origin of 

 the main veins at the base of the wings, the anal area is nearly as broad as it is long, and 

 the anal veins, which are numerous and approximate, are arcuate, parallel, and mostly 

 simple. 



The wing is of medium size, being probably 26 mm. long (the fragment preserved has a 

 length of 25 mm.), and is 10 mm. broad ; or the breadth is to the length as 1-: 2.5. The 

 representation on my plate gives it a very little too small, and especially too short. 



Germar subsequently placed his Bl. anihracophila with this species, but wrongly, as I 

 have endeavored to show in my remarks under that species. Goldenberg at one time consid- 

 ered Hermatobl. labachensis as a variety of this, but afterwards more correctly removed it 

 from that category ; for the principal distinction in this case also, see the remarks under that 

 species. We have placed it between the two American species of this genus, not because 

 it seemed most closely allied to them, but because their place in the series appeared to lie 

 here. Etobl. anaglyptica, however, seems to be very closely related to Etobl. venusta in 

 most of its features, but is smaller than it, has a proportionally smaller scapular field and a 

 considerably larger externomedian field ; the distribution of the apical branches of the in- 

 ternomedian vein is also more complex in this species than in Etobl. venusta ; from Etobl. 

 Lesquereuxii it is at once separable by the form of the wing and the greater breadth and 

 extent of the mediastinal area. Among European species it is perhaps most nearly allied 

 to Etobl. mantidioides and Etobl carbonaria, but differs from both»of them in much the 

 same particulars as from Etobl. venusta; it is also larger than they, and especially than 

 Etobl. mantidioides. 



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



Etoblattina venusta. PI. 6, fig. 12. 



Blattina venusta Lesq., Owen, 2d Rep. Geol. Ark., 314, pi. 5, fig. 11; — Heer, Viertelj. 

 naturf. Gesellsch. Zurich, ix, 287; — Scudd., Geol. Mag., v, 176-77; — Gold., Faun, 

 saraep. foss., ii, 19. 



Front wing. The wing has an oblong subovate form, apparently resembling that of 

 Etobl. carbonaria, so far as can be judged from the rather imperfect fragment which repre- 

 sents the American species ; the costal margin, however, is nearly perfect, and is very 

 regularly and considerably convex — more convex, perhaps, than in any other species of 

 Etoblattina. Although the base of the single known specimen is broken, the veins by their 

 curve appear to have arisen near the middle line of the wing, and to have been well arched 

 in running from the base. The mediastinal vein runs subparallel to the costal margin, 

 gradually approaching it in its apical half, and at last rather suddenly impinging on it, at 

 about the end of the middle fifth of the wing; it emits an excessive number (sixteen or 

 more) of mostly arcuate, simple or forked veins, closely crowded and subparallel, at base 

 nearly transverse, at tip very oblique; in its middle the area is nearly one-fourth the width 



