730 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



METAXYBLATTA HADROPTERA, new species. 



Locality. — Port (iiifiitli Switchbju-k, Pennsylvania. Anthracite 

 series; E coal. 



Fig. 49. — Metaxyblatta hadroptera. 



Length of the front wing, 23 mm. 

 Holotyp^.^Ciit. No. 38783, U.S.N.M. 



ARCHIMYLACRIS Scudder. 



Front wing, twice as long as broad, with very strongly arched ante- 

 rior margin and gently curved inner border; hence, subreniforni. 

 Costal area extending two-thirds the length of the wing, band shaped, 

 with 10 to IP) in part compound veins. Radius divided before or in 

 the center of the wing; its upper branch sends off about 3 forked or 

 simple twigs to the front margin, while the lower branch separates 

 into 5 twigs, which are oriented toward the apical l)order. The media 

 curves toward the lower end of the apical margin and sends out to it 

 3 to -i oti'shoots, which branch off forward. The cubitus gives oft' 5 to 

 8 rather regular branches to the posterior ])order. The anal area 

 contains onl}- a limited number of veins and occupies about two-tifths 

 the length of the wing. The cross veins are close and rather regular. 



Type of genus, Archmiylaeris acadica Scudder. 



ARCHIMYLACRIS ACADICA Scudder. 



Arcldym/lacris (rcadica ScuooEii, Dawson's Acadian Geol., 2 ed., lcS68, \). 888, liif. 

 158; Mem. Boston Soc, III, 1879, p. 84, pi. vi, figs. 8, 14. 



IjHiiJify. — Main coal. East River, Pictou, N. S. Pennsylvanian. 



ARCHIMYLACRIS VENUSTA ( Lesquereux.) 



BlaUinu venuda Lesquereux, 2d Rept. Geol. Ark., 1860, p. 814, pi. v, tig. 11. 

 EtohlaUiva renusia i^cvnvF.K, Mem. Boston Roc, III, 1879, \>. 70, i)l. vi, tig. 12. 



Locality. — Frog Bayou. Arkansas. Upper coal-bearing division 

 ( '. — Allegheny stage). 



