ARTHROPOD A— INSECTA. 



435 



Fig. 1738. Palaeozoic cockroaches, a, Hemiinylacris clintoniana (Scudder), X 

 2; by Adeloblatta columbiana (Scudder), X 2; c^ body of cockroach enlarged. 

 (After Scudder.) 



1739, a), both from Mazon Creek, 111. Phyloblatta dichotoma 

 Handlirsch (Fig. 1739, c^), and P. arcuata Handl. (Fig. 1739,^) 

 (both referred by Scudder to Etoblattina communis) ; and Brady- 

 blatta sagittaria (Scudder) (Fig. 1739, c), this and the two pre- 

 ceding from the Dunkard formation (Permic) of Cassville, W. Va. 



Fig. 1739. Palseozoic cockroaches (referred to- Etoblattina by Scudder). Uy 

 Asemoblatta mazona (Scudder), Mazon Creek, 111.; b, Dicladoblatta tenuis (Scudder), 

 Conemaugh of Ohio; c, Bradyblatta sagittaria (Scudder); d, Phyloblatta dichotoma 

 Handl.; <?, P. arcuata Handl.; c^ ^and e, from Dunkard of W, Va, 



