800 PROCEEDINGS OF THE NATIONAL MUSEUM. 



nvniph, because other equally' Avide blattoid fonii.s occur, which do not 

 belong to the mylacrids. The venation is not discernible (in the 

 figures). 



H<>l<>tiipe and ]>lrs;<>fiipe.—Q>'A.i. Nos. 25924 and 38864, U.S.N.M. 



(BLATTOIDEA) MELANDERI, new species. 



Mylacrla [Dipdtis) diplodiscus Mklandek (nut Packard), Jour. Zool. (2), XI, 

 1903, p. 185, pi. V, fig. 6; pi. vii, fig. 6. 



Local'itij. — Mazon Creek, near Morris, Illinois. Pennsylvauian; 

 Kittaiiiiing-^ (Allegheny) stage. 



(BLATTOIDEA) SCHUCHERTIANA, new species. 



Dipellli^ (lij)lodiscus Schuchert (not Packard) (part), Proc. U. S. Nat. Mus., 



XIX, 1897, p. 672, pi. Lviii, figs. 4, 5 (not figs. 2, 3). 

 Mi/lacris {Di pelt is) diplodiscus Sellards (not Packard) (part), Amer. Jour. Sci. 



(4), XVIII, 1904, p. 124, fig. 2 (not figs. 3, 4). 



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

 Kittanning^ (Alleghen}") stage. 



Ilolotype.—C^t. No. 25925, U.S.N.M. 



(BLATTOIDEA) SELLARDSII, new species. 



3Ii/l((cris (Di/K/tlx) dipdodiscus Sellards (not Packard) (part), Amer. Jour. Sci. 

 (4), X VIII, 1904, p. 124, fig. 3 (not figs. 2, 4). 



Local /'tf/. — Mazon Creek, near Morris, Illinois. Pennsylvauian; 

 Kittaiining^ (Allegheny) stage. 



All these larval forms may belong to ditieront species. 



(BLATTOIDEA) ANCEPS (Sellards). 



Mi/lurrid.r Sellards, Amer. Jour. Sci. (4), XV, 1893, p. 309, pi. vii, fig. 9. 



Mi/lacris anceps Sellards, Amer. Jour. Sci. (4), XVIII, 1904, p. 129, fig. 5. 



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

 Kittanniug^ (Allegheny) stage. 



(BLATTOIDEA) SELLARDSIANA, new species. 



Mylacr is elongaia {nyiUYih) Sellards, Amer. Jour. Sci. (4), XVIII, 1904, p. 125, 

 figs. 6, 7. 



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

 Kittanning? (Allegheny) stage. 



The association of this n3"niph with Mylacrh elongata Scudder 

 appears to me not proved. 



(BLATTOIDEA) CARRI (Schuchert). 



Dipeltis carri Schuchert, Proc. U. S. Nat. Mus., XIX, 1897, p. 671. 

 Dipeltis carri Sellards, Amer. Jour. Sci. (4), XV, 1903, p. 309. 



Locality. — Mazon Creek, near Morris, Illinois, Pennsj'lvanian; 

 Kittaning? (Allegheny) stage. 



