722 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



PLAGIOBLATTA PARALLELA (Scudder). 



Archimiildcris /larallela Scudder, Mem. Boston Soc, 111, 1879, p. 85, pi. vi, Ho;. 6. 



Loealitt/. — Cannelton, Penns^dviinia. Allegheny formation; Kit- 

 tanning group; roof of the Middle Kittanning coal. 

 Holotyp^.—VAxi. No. 38093, U.S.N.M. 



PLAGIOBLATTA CAMPBELLI, new species. 



Locality. — Railway cut, Moss Creek, one-half mile above Gorman's 

 Mills, Pennsylvania, From shales about 40 feet below B coal {'(). 

 Pennsylvanian; Coal Measures? Conemaugh stage. 



Length of the front wing about 30 mm. Costal area broader than 

 in Plaglohlatta parallela. Radius directed more to the middle of the 

 apical border. 



Figs. 41, 42.— Plagioblatta campbeij.i. 



Cotype.^.—Q'Ai. No. 35391, U.S. N. M. CoHected by Messrs. Burrows 

 and Campbell. Survey of the Barnsboro, Pennsylvania, quadrangle. 



SCHIZOBLATTA, new genus. 



Front wing elliptical, about '2| times as long as l)road. Costal area 

 extending about three- fifths the length of the wing, with about 9 or 

 10 normal veins; not expanded at the base. Radius divided into 2 

 principal stems, the superior of which separates into H ])ranches and 

 the inferior into 8, the majority of the latter ending in the apical 

 border. The media likewise divides into 2 njain stems, the anterior of 

 which forms 5 branches and the posterior -l, all of which fuse in the 

 apical margin The 8 branches of the gently vaulted cubitus take up 

 the entire inner border. The anal area attains nearly half the length 

 of the wing. Cross veins are not to be distinguished, but instead 

 there is a fine-grained leathery structure. 



