AMERICA N PA LEO ZOIC INSECTS— HA NDL IRSCH. 745 



APEMPHERUS COMPLEXINERVIS (Scudder). 



/'nnih/iiltiiKi roinpiex'meri-h Scuudkk, Bull. V. S. (ieol. Surv., No. 124, 1S95, 

 p. i:^H, 1)1. XI, fig. 14. 



Localittj. — Cassville, West Yirg-inia. Diinkard formation; Lower 

 Permian. 



Jlolotype.—Cxit. No. 3S204, U.S.N.M. 



APEMPHERUS FOSSUS (Scudder). 

 Portildalfiiia fossa SctTnuEU, Bull. U. J^. (reol. 8urv., No. 124, ISHfi, p. 1.S7, pi. xi, 



%. irx ■ 



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

 Permian. 



Cotypes.—OAt. No. 38203, U.S.N.M. 



XENOBLATTA, new genus. 



Front wing subeniptical, 2^ times as long as broad, costal area 

 reaching three-iifths to three-fourths the length of the wing, band- 

 shaped. The radius with its ])ranches takes up the free portion of the 

 upper margin and the greater part of the apical margin; its superior 

 ])ranch forms 3 to -t twigs. The few offshoots of the media ])ranch 

 off' forward and are directed obliquely backward to the end of the 

 apical border. The cubitus does not reach the apical margin. The 

 anal area occupies al)out two-fffths the length of the wing. The inter- 

 calary venation consists of delicate, irregular, somewhat crinkled 

 cross veins. 



T>'pe of genus, Xenohhdta fraterna (Scudder). 



One pAiropean species also })elongs to this genus. 



XENOBLATTA FRATERNA (Scudder). 



GerithlaHln(ifr<ttermi Scudder, Bull. U. S. (tpoI. Surv., No. 101, 1898, p. 19, pi. n, 

 Hg.s. (1, f; No. 124, 1895, pi. x, tig. IH. 



Locidity. — East Providence, Rhode Island. Pennsylvanian: Ten- 

 mile series; Alleglieny or Conemaugh stage. 



][oJ(>tyj>e.--Vvit. No. 38059, U.S.N.M. ' 



OLETHROBLATTA, ne^A^ genus. 



Front wing broadly elliptical, twice as long as wide, with very 

 strongly arched front margin andsynunetrically rounded apical border. 

 Costal area of moderate lu'eadth, band- shaped attaining three-fifths 

 the length of the wing, with a])out 8 to 10 chiefly simple veins. Radius 

 comparatively stout, directed forward, with 5 more or less compound 

 veins oriented toward the anterior margin, the first of which remains 

 simple. The media continues in a gentle cui-ve through the middle of 

 the wing and sends out 3 rarely compound branches forward to the 



