AMERICAN PALEOZOIC INSECTS— HANDLIBSCH. 



771 



ORTHOMYLACRIS ALUTACEA, new species. 



Locality. — Port Griffith Switchback, Pennsylvania. xVnthracite 

 series; ?D coal. 



Front wing, 30 nnn. long; 2^ times as long- as l)road. Costal area 



extending nearl}' three-fourths the length of the wing. Radius with 



Fig. 75.— ORTHOMYLACRIS ALUTACKA. 



•1 branches, which form short terminal forks. Media with 3 offshoots. 

 Cubitus with 4 branches. Anal area extending nearly half the length 

 of the wing. Fine-grained leathery structure. 

 Holoty2)e.—C2it. No. 38772, U.S.N.M. 



ORTHOMYLACRIS PLUTEUS (Scudder). 



Paromylncris f pluten>i IScuddek, Bull. V. S. Geol. 8urv., No. 124. 1895, p. 54, 

 pi. Ill, fig. 2. 



Locality. — Butler Mine, near Pittston, Pennsylvania. Anthracite 

 series; E. coal. 



IMotype.-C'dt. No. 3804S, U.S.N.M. 



ORTHOMYLACRIS ANTIQUA (Scudder). 



Mylacris antiqua Scuddek, Mem. Boston Soc, 111, 1884, p. 300; Bull. U. 8. (ieol. 

 Surv.. No. 124, 1895, p. 46, pi, ii, figs. 5, 6. 



Locality. — Mazon Creek, near Morris, Illinois. Pennsylvanian; 

 Kittanning ? (Allegheny) stage. 



IIoIotyjM.— Cut. No. 38050, U.S.N.M. 



ORTHOMYLACRIS PENNSYLVANICA, new species. 



Locality. — Lorbery Gap, in Sharp Mountain, 6 miles west of Tre- 

 mont, Pennsylvania. Anthracite series; stage ? 



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Fig. 76.— ORTHOMYLACRIS PENNSYLVANICA 



Fragment, about 32 mm. long, of a front wing, costal area extending 

 two-thirds the length of the wing. Radius with about 3 branches, the 



