410 SAMUEL II. 8CUDDER ON 



The sjjecimen was obtained by Mr. R. D. Lacoe, and bears the number 2041 in his 

 collection. It was found at the Port Griffith railway cut near Pittston, Pa., over the E 

 vein and probably over the F vein. 



BLATTIN'ARIAE Scudder. 



The species to add to this group of cai'boniferous cockroaches are really more numer- 

 ous than those from the Mylacridae; but only a few of them are here selected, as the 

 larger part are still unstudied, and there are no new generic types to be found among 

 them, though one, the last described below, belongs to a generic type not before recognized 

 in American rocks. 



Etoblattina occidentalis sp. nov. 

 PI. 32, fig. 4. 



Fore wing long and slender, its greatest width before the middle; the costal margin 

 is rather strongly convex on the basal quarter of the wing, and scarcely at all convex in 

 the middle; the inner margin is gently convex but nearly straight in the middle and the 

 apex is tapering and well rounded. The veins originate at about the middle of the some- 

 what constricted base, and all curve considerably upvvai'd in separating, excepting the 

 anal furrow. The mediastinal vein runs closely parallel to the costal margin, nearly to 

 the middle of the wing, and then curves toward it, terminating only a little before the 

 end of the middle third; it emits a considerable number of equidistant, obliquely curving, 

 simple branches, of Avhich there are about seven in the distal half of the field. The scap- 

 ular vein runs still more nearly parallel to the costal margin as far as the middle of the 

 wing, and then sweeps very gradually toward it, reaching it only a very little before the 

 tip of the wing; beginning to branch about opposite the end of the anal farrow, it emits 

 about half a dozen subequidistant, simple or simply forked, nearly straight but slightly 

 sinuous branches, which are more longitudinal than those of the preceding area; in the 

 middle of the wing this area and the preceding occupy scarcely two-fifths its width. 

 The externomediau vein divides close by the divarication of the scapular; previous to 

 forking, it is regularly and considerably arcuate; it is now straight at first, but after- 

 wards appears to take on a sinuous course, obscured in the only specimen; it emits three 

 or four principal longitudinal branches which dichotomize somewhat, especially in the 

 apical third of the wing, the nervules curving downward more or less as they approach 

 the margin. The internomedian vein follows closely the course of the externomedian and 

 apparently terminates a little further out than the mediastinal; it emits in the basal half 

 of its course five or six more or less curving, generally simple veins, and doubtless an 

 equal number beyond, but this part is obscured in our fossil. The anal furrow is re- 

 markably pronounced, strongly and regularly arcuate, terminating scai'cely beyond the 

 end of the basal third of the wing, and followed in the anal area by seven or eight equi- 

 distant, similarly arcuate, simple veins. 



The wing is of good size, being 32 mm. long, and 12 mm. broad, or the breadth to the 

 length as 1 : 2.7. 



