82 S. II. SCUDDER ON PALAEOZOIC COCKROACHES. 



Etoblattina (?) insignis. PL 2, fig. 7 ; pi. 4, fig. 9. 



Blattina insignis Gold., Vorw. Faun. Saarbr., 17; — lb., Faun, saraep. foss.. i. 17, taf. 2, 

 fig. 14; — lb., Faun, saraep. foss., ii, 20. 51; — Scudd., Mem. Bost. soc. nat. hist.. 

 in, 19. 



The front wing of this insect seems to have very nearly the same form as that of the 

 preceding species, but has perhaps a little fuller anal area, and a less pointed tip. It is not 

 at all clear from what point the veins originate, and it is doubtful whether they have a 

 common origin. The veins are all exceedingly obscure, and even the limits of the areas are 

 doubtful. The mediastinal area appears to have a width of one-third that of the wing at 

 the base, and the vein seems to terminate at about the end of the middle third of the wing. 

 The scapular vein is apparently nearly straight, running down the middle of the wing, and 

 terminating at the tip. The externomedian probably occupies a narrow area; it can hardly 

 divide before the middle of the wing, and on the margin covers the apical third of the 

 inner border. The internomedian vein probably terminates at the end of the middle third of 

 the wing, perhaps farther out, and is supplied with closely crowded forking veins. The anal 

 furrow is deeply impressed, arcuate, and rather bent in the middle, and terminates at the 

 end of the basal third of the wing. No branches of veins can be made out, to judge from 

 Goldenberg's drawing, excepting in the internomedian area. 



The two front wings are present in the only specimen yet discovered, one broken at the 

 tip, the other along the inner margin ; between these two the form of the wing can be 

 accurately determined, but the tip is represented inaccurately in PI. 2, fig. 7, as fully 

 rounded, whereas its form should be much as in Etohl. parvula. With that species, it 

 is the smallest known, the front wing measuring but 9 mm. in length, and 4.2-3 mm. in 

 breadth, the breadth being to the length as 1 : 2.12. 



Goldenberg remarks, that from the slight traces of the veins, the texture of the front, 

 wings of this insect A\as probably similar to that of those of Corydia and Phorasjns. 



Hind wing. The hind wing of this species closely resembles the front wing in form and 

 size, and could scarcely have possessed a plicated anal area ; the neuration, too, is nearly as 

 obscure as in the front wing, throwing some doubt upon the presumed thickened consistency 

 of the front winy:, since, in living insects, the hind wing is always membranous. In the 

 original drawings of this insect, which formed the basis of Goldenberg's plates, and which 

 Dr. Goldenberg has been kind enough to send me for study, the two hind wings are not 

 quite alike, the left wing, which I have reproduced in outline in PI. 4, fig. 9, being con- 

 siderably more pointed and narrower than the right wing; the two wings show, also, a 

 somewhat different arrangement of veins, although these are very obscure in both ; next 

 the front wing, which hides a portion of the costal area, there are in the left wing several 

 longitudinal parallel veins, which cannot be made out in the right ; and the rest of the 

 wing, or fully two-thirds of it, is made up of a single longitudinal vein (the anal), with 

 numerous obliquely longitudinal, simple branches; on the right wing, however, it would 

 appear as if these branches, holding much the same position, were about equally divided 

 between an anal and an internomedian set, in both of which they appear to be forked as 

 often as simple; the arrangement faintly indicated on the right wing, corresponds better, 

 although not closely, to that of the front wing. Goldenberg considers all the veins as 



