A ME RICA X PA LEO ZOIC INSECTS— HA NDLIRSCII. 743 



AMBLYBLATTA LATA (Scudder). 

 Genthbiltina lata Scuddkk, Bull. II. S. (Teol. Surv., No. 124, 1S95, p. 125, pi. \i, 



L(>(<il!ty. — Cassville, We.st Virginia. Dunkurd t'oimatioii; Lowei- 

 IVnnian. 



Il<>l<>t,/l>e.~0.it. No. 88174, LJ.S.N.M. 



PENETOBLATTA, new genus. 



Front wing' broad, truncate, about twice as long as wide. Costal 

 area reaching threi^-fourths the length of the wing. Kadius vaulted, 

 extending to the middle of the apical margin, with 4 more or less com- 

 pound veins directed forward. Media divided into 2 principal stems, 

 each of which forms about 5 twigs. The twigs of the main anterior 

 branch run otf backward and end in the apical l)order; those of the 

 main posterior ])ranch take up a portion of the iiuier margin. In 

 consequence of this, the cuV)itus is somewhat more reduced and forms 

 only al)out 4 branches, wdiich occupy the central part of the posterior 

 l)order. The cross veins are not well developed, being partially or 

 wholl}' replaced by a close network. 



Type of genus, l\n<'f<>l>l<ttt(i virgmiensix (Scudder). 



PENETOBLATTA VIRGINIENSIS (Scudder). 



Anthraeohlaltina. rirf/iniensis Scudder, Bull. U. S. (feol. Surv., No. 124, 1S9.5, ji. 

 130, pi. XI, fig. S. 



Local 'dy. — Cassville, West Virginia. Duidvard formation; Lower 

 Permian. 



Jlolotype.—Cixt. No. 88104, U.S.N.M. 



PENETOBLATTA ROTUNDATA (Scudder). 



Gerablattina rotundata Hcudder, Bull. U. 8. Geol. Surv., No. 124, 1895, p. 126, 

 pi. XI, fig. 3. 



Locality. — Cassville, West Virginia. Dunkard formation; Lower 

 Permian. 



lIolotypc.—C'At. No. 88171, U.S.N.M. 



PAREINOBLATTA, new genus. 



Front wing shaped like that in Phylohlatta, 2^ times as long as 

 broad. C^ostal area very narrow, extending t\\o-thirds the length of 

 the wing. Radius slightly vaulted and stretching toward the upper 

 part of the apical border; its first branch consists of 6 twigs, while 

 the second and third are simply forked. Media anastomosing with the 

 radius to the first third of the length of the wuig, then directed 

 obli(|ueh- to th(i extremity of the innei- margin, with 4 simple ofi- 



