AMERICAN PALEOZOIC INSECTS— HANDLIRSCH. 783 



strongly arcuate anterior marg-in and rounded humeral angle; about 

 2ir times as long as broad. Costal area almost triangular, continuing 

 soiuewhat beyond half the length of the wing, with 3 bunches of veins 

 issuing from oiu^ point, the first of which shows about 6 twigs. The 

 radius is ([uite distinctively formed, in that from one point not far 

 from the base 4 raj^-like branches run otf successively; the tirst, sec- 

 ond, and fourth of these I)ranches always consist of 3 to 4 branchlets, 

 while the third remains simple. According to the figure it may be 

 concluded that the branches of the radius scarcely fill up the entire 

 free anterior margin. The media forms about 3 or 4 olfshoots, which 

 are directed forward toward the apical bordei-; and the cul)itus about 

 5 branches, which in each case till the entire free posterioi- margin. 

 The anal area is about twice as long as high and half as long as the 

 inner margin, and contains regular veins fusing in the posterior 

 border. 



PROMYLACRIS OVALIS Scudder. 



Promi/lacris ovalis iicvDDEii, rroc. Acad. Nat. Sci. Phila., 1885, p. 34; Mem. Boston 

 Soc, IV, 1890, p. 403, pi. xxxi, figs. 1 to 4. 



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

 Kittanning ? (Allegheny) stage. 



MYLACRID.E OF DOUBTFUL SYSTEMATIC POSITION. 



PAROMYLACRIS ROTUNDA Scudder. 



Paromylacrlif rotunda Hcuddek, rroc. Acad. Nat. Sci. Phila. , 1885, p. 35; Mein. 

 Boston Soc, IV, 1890, p. 406, \A. xxxii, figs. 1, 2. 



Localtty. — Mazon Creek, near Morris, Illinois. Penn.sy Iranian; 

 Kittanning^ (Allegheny) stage. 



This species is to ))e regarded as fehe type of the genus Paroiiiylarrt's. 

 IIolotype.—OAi. No. 38047, U.S.N.M. 



(MYLACRID^) PRISCOVOLANS (Scudder). 



Mylacris priscovolans Scudder. Mem. Boston Soc, III, 1.S84, p. 307, \A. xxvii, 

 fig. 9. 



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

 ning group; roof of the Middle Kittanning coal. 

 C<v^y/^>(.y.— Cat. No. 38055; U.S.N.M. 



(MYLACRID.^) PAUPERATA (Scudder). 



Lithomiilacris pduperata Scudder, Mem. Boston Soc, IV, 1890, p. 409, pi. xxxii, 

 fig. 5. 



Locality. — Port Griffith, Pennsylvania. Anthracite series; E coal. 

 ILolotype.—Ciii. No. 38095, U.S.N.M. 



Proc. N. M. vol. XXIX— 05 54 



