A ME RICA X PA LEOZOK ' INSECTS— HA XDLIRSC 11 



769 



simple, the second 3-parted. Media with 3 (forked) branches. Cubi- 

 tus turned strongly backwai'd, with 2 forked and one simple l)ranch. 

 Anal area extending nearly half the length of the wing; the first anal 

 vein with several branches running off posteriorly. Structure cross 

 wrinkled. 



Holotype.—C'Ai. No. 88784, C.S.N.M. 



ORTHOMYLACRIS RUGULOSA, new species. 



LocaUti/. — Lorberry Gap, in Sharp Mountain, near Tremont, Penn- 

 sylvania. Anthracite series; stage? 



Fig. 72.— Orthomylacris rugulosa. 



Front wing, 20 mm. long, about 2it times as long as broad. Very 

 similar to the foregoing species. Costal area shorter. Anal area 

 only extending two-tifths the length of the wing. Cross veins more 

 distinct. 



Holotyj>e.—C'Ai. No. 88791, U.S.N.M. 



ORTHOMYLACRIS TRUNCATULA, new species. 



Locality. — Port Griffith, Pennsj'lvania; Anthracite series; E coal. 

 Front wing, 23 mm. long, twice as long as wade. Costal area fully 

 two-thirds the wing in length, its veins divided into about 5 bunches. 



Fig. 73.— Orthomylacris truncatula. 



Radius with H ))ranches, the first and second of which are simple, the 

 third, 3-parted. Media with 3 compound branches. Cubitus with 5 

 oftshoots. Anal area reaching nearly half the length of the wing. 

 Indistinctly leather}". 

 IIolotype.—Q2iJi. No. 38773, U.S.N.M. 



