702 



rR()('KKlJlN<i,S OF THE NATIONAL Mi.SEUM. 



VOL. XXIX. 



GERARUS Scudder. 



Wini>-.s with sliii'htly iiivuate anterior border, niaro-inal costa, ])roadly 

 rounded end, and abridg-ed subcosta. Radiu« simple. Radial sector 

 issuing near the base, with numerous in part divided branches. Media 

 (at least in the hind wing) free; cubitus with several otf shoots branch- 



ing out backward. 



Anal area of " '*' ^und wing fatdike, enlarged, and 



plaited. 



GERARUS VETUS Scudder. 



Gernrnx fifun Scuddek, Meui. Boston Soc, III, 1885, p. 344, jil. xxxi, fig. 6. 



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

 Kittanning 'i (Allegheny) stage. 



Scudder placed this form in the group ''Gerarina," of his neurop- 

 teroid Palieodictyoptera. 



Ilolotype.—r^^ ^^. 38136, U.S.N.M. 



•GERARUS LONGUS, new species. 



LocaJltij. — IV'^'on Creek, near Morris, Illinois. Pennsjdvanian; 

 Kittaning 'i (Allegheny) stage. 



Fig. 29.— Gerabus longus. 



Length in similar wings, 5() nun. ; more slender than the preceding 

 species. 



Holotyjje.—Q'At. No. 38822, U.S.N.M. 



