770 



PROCEEDINGS OF THE NA TIONAL MUSEUM. 



VOL. XXI.V. 



ORTHOMYLACRIS ELONGATA, new species. 



Locality. — LorbeiTv Gap, in Sharp Mountain, 5 miles west of Tre- 

 niont, Pennsylvania. Anthracite series; stage? 



Front wing, 26 nun. long, 2| times as long as broad. Costal area 

 reaching about five-eighths the length of the wing, its veins united into 



Fig. 74.— Orthomylacris elongata. 



3 or 4 bunches. Radius with 6 branches, the first simple, the second 

 with 5 twigs, and the third with 3. Media with about 3 branches, 

 cubitus with 4. Anal area extending two-fifths the length of the wing. 

 Finely crinkled cross veins. 



IIolotype.—C?it. No. 25687, U.S.N.M. 



ORTHOMYLACRIS MANSFIELDI (Scudder). 



Mylacris ntansfieldi Scudder, Mem. Boston Soi'., Ill, 1879, p. 47, pi. v, fig. 15. 



Locality. — Cannelton, Pennsylvania. Allegheny formation; Kit- 

 tanning group; roof of the Middle Kittanning coal. 



ORTHOMYLACRIS LUCIFUGA (Scudder). 



Mylacris hiclfuga StUDDER, Mem. Boston tSoc, III, 1884, p. 301, pi. xxvii, fig. 8. 



Locality. — Port Griflith Switchback, near Pittston, Pennsylvania. 

 Anthracite series; ?D coal. 



Holotype.— Cat. No. 38054. U.S.N.M. 



ORTHOMYLACRIS HEERI (Scudder). 



Blaltina Jieeri Scudder, Canad. Nat., VII, 1874, p. 272, fig. 2. 



Mylacris keen Scudder, Mem. Boston Soc, 111, 1879, p. 43, pi. v, fig. 11. 



Locality. — Sydney, Cape Breton. Middle coal formation; Alle- 

 gheny stage? 



