S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 117 



Hermatoblattina lebachensis. PI. 4, fig. 11. 



Blattina lebachensis Gold., Sitzungsb. math.-nat. CI. k. Akad. Wiss. Wien., ix, 38 (unde- 



scribed). 

 Blattina lebachensis Gold., Palaeontogr., iv, 22, 23, taf. 6, fig. 7 ; — lb., Foss. Ins. Saarbr. 



6, 7, taf. 4, fig. 7; — lb., Faun, saraep. foss., ii, 20, 27, 51, taf. 1, fig. 20; — Gieb., 



Ins. Vorw., 316; — Gein., Geol. Steink. Deutscbl., 150. 



Fore wing. The extreme base and a considerable part of the apex of the wing being 

 lost, its form cannot be given in detail ; but it is remarkable for its great breadth near the 

 base, due to the unusual convexity of the basal half of the costal margin, which is a little 

 exaggerated in the plate ; beyond this fulness the costal margin is straight, and gradually 

 approaches the inner margin, which is itself very gently and regularly convex, so that the 

 wing tapers considerably beyond the basal third. The veins appear to originate not far 

 from the middle of the base, perhaps a little above it, and have a long basal arcuation. 

 The mediastinal vein is very broadly and gently sinuous, straighter than the costal margin, 

 so that the mediastinal area, which terminates just at the tip of the fragment, and probably 

 not much before the apical sixth of the wing, narrows toward either extremity from the 

 middle of its basal half, being at its broadest about one-third the width of the wing ; it 

 emits eight distant, straight branches, all excepting one which is forked, simple, the basal 

 one transversely, the apical ones a little longitudinally oblique. The scapular is throughout 

 close and parallel to the mediastinal vein ; it seems to be coalesced with the externo- 

 median vein in the basal fourth or third of the wing, and to have three inferior, simple, 

 longitudinal, arcuate, apically distant branches, the first arising beyond the basal third of 

 the wing and reaching the extreme tip, the last arising at about the end .of the middle 

 third of the wing. The externomedian vein is very broadly and gently sinuous, running 

 down the middle line of the wing, terminating just below the tip, and emitting three 

 inferior, simple, gently arcuate, sublongitudinal, apically distant branches, arising almost 

 opposite those of the scapular vein. The internomedian vein is strongly and regularly 

 arcuate, apically straight or slightly arcuate in a reversed sense, terminating about opposite 

 the end of the mediastinal vein, and emitting half a dozen rather closely approximate, very 

 long, oblique, straight or sinuate simple branches, the penultimate, in the individual figured 

 by Goldenberg in his Fauna saraepontana, ending in the preceding branch. 1 The anal furrow 

 is lightly impressed, gently convex, and terminates a little before the middle of the wing ; 

 the anal veins, five or six in number, are simple, not very closely crowded, and similarly 

 arcuate. 



The wing is a large one, the fragment measuring 28.5 mm. in length, and 1G mm. in 

 breadth ; the length of the wing may be anywhere from 32 to 36 mm., so that the breadth 

 is to the length as 1:2- 2.25. The wing is from the left side, and the upper surface is 

 exposed ; the recticulation of the wing is composed of polygonal, mostly tetragonal or 

 pentagonal, cells, forming a network which may be seen with the naked eye, and are more 

 delicate on the disc than near the apex. 



1 In his first description, Goldenberg describes the six in- his second description, based apparently on the same speci- 



ternomedian branches as all simple excepting the fourth, men, he describes them as all simple and 6gures them as we 



which is forked ; and he figures them as all simple and run- have here described, 

 ning to the margin excepting the third, which is forked. In 



