S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 61 



croaching a little upon the costal and especially upon the inner margin. The internomedian 

 vein is somewhat arcuate at the base, curving upward to above the middle of the wing, but 

 afterwards extends to the inner margin in a nearly straight, arcuate course, terminating 

 probably at some distance beyond the middle of the apical half of the wing, and emitting 

 six or seven simple, oblique, straight, parallel and rather distant branches. The anal fur- 

 row is distinct, sharply arcuate, and terminates near the middle of the basal third of the 

 wing, the four or more rather distant simple anal veins being subparallel to it but less 

 curved. 



Two specimens were described by Germar, both plainly belonging to the same species, 1 

 which is a large one, the wings measuring 10.5 mm. in breadth, and the longest fragment 

 31 mm. in length ; the entire length was probably 33 mm., and the breadth to the length 

 as 1 : 3.14. The specimens subsequently referred to this species by Goldenberg not only 

 do not belong to it, but are referable to several distinct species (cf. Etobl. Dohrtiii, 

 Gerabl. producta, and Gerabl. weissiana). 



Hind wing. One of the specimens figured by Germar has, besides the larger part of the 

 left fore wing, broken fragments of the two hind wings, one of which, the left, we have 

 reproduced on pi. 4, fig. 7. These show that the neuration of the hind wing was very sim- 

 ilar indeed to that of the front wing. The mediastinal vein extended further toward the 

 tip, but was somewhat similarly formed. The scapular vein had the same general arrange- 

 ment and proportional extent. The same is true of the externomedian vein, excepting that 

 the branches appear to be inferior instead of superior ; but of the rest of the wing nothing 

 can be d tenninecl ; the interspaces throughout are of the same width. From the distribu- 

 tion of the veins it would appear as if the anal field were plicated, and this Germar asserts, 

 but the fractured condition of the fossil does not allow of certainty, so far as the illustra- 

 tions show. 



It would appear from Germar's figure that there is some difference in the venation of 

 the two wings ; the mediastinal area appears much longer, for instance, in the right than 

 in the left wing. On the right wing an additional principal vein, the marginal, extends 

 down, next the costal margin, as far as the middle of the wing, but this portion is broken 

 from the left wing. 



This species is one of the largest of the slender forms of Etoblattina, the front wing 

 having at the same time a more equal width than usual. In this particular it differs from 

 the preceding species conspicuously ; from Etobl. affinis, to which it appears to be most 

 nearly allied, it differs in its very much greater size and in the more distant neuration. 

 From Etobl. Dohrnii, which was referred to the same species by Goldenberg, it differs in 

 the course of the mediastinal vein, which is parallel to the costal margin ; probably also by 

 the smaller extent of the internomedian area apically ; and by the form of the wing, which 

 has a more strongly convex costal margin, and especially an arcuate base which bends the 

 roots of all the veins downward, instead of leaving them straight as in the latter species ; 

 it is also a little larger. 



The two specimens come from Wettin, Germany. Upper carboniferous. 



1 Giebel says that the two fore wings figured by Germar stood when perfect wings are discovered"; but the difTer- 

 "show some differences, whose meaning will only be under- ences are so very slight that they cannot have specific value. 



