780 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXIX. 



? MYLACRIS DUBIA, new species. 



Localfty. — Lorberry Gap, 5 miles west of Tremont, Pennsylvania. 

 Anthracite series; stage? 



Front wino^, a])out 25 mm. long, 2^ times as long as broad. The 

 venation is very indistinct]}- preserved, but as far as known agrees 

 with that of the foregoing S])ecies. The anal area is also as long as 

 in that form. 



Pigs. 89, 90.—? Myla^ris dubia. 



The hind wing shows an anal area marked off ])y a fold, and extends 

 about two-thirds the length of the wing. The radius sends 5 branches 

 forward toward the tip of the wing; the media gives off 3 offshoots 

 posteriori}^ and the cubitus forms a double fork. 



Cotypes.—Qvii. No. 38746, F.S.N.M. 



? APHELOMYLACRIS, new genus. 



A provisional genus founded on an imperfectly preserved form, the 

 venation of which appears to have great similarity to that of Mylacr!s. 

 The front wing is cordate, twice as long as broad. The triangular 

 costal area hardly extends beyond half the length of the wing, and 

 contains but few veins. The radius forms 5 branches, the iirst 3 of 

 which are furcate. The media appears to send out only 2 branches 

 anteriorly; still this part of the wing is here indistinctly preserved. 

 The cubitus forms about 8 uniform, simple branches. Anal area less 

 than half as long as high. Traces of cross wrinkles are distinctly to 

 be seen. 



.? APHELOMYLACRIS MODESTA, new species. 



Locality. — Pawtucket, Rhode Island. Pennsylvanian; Ten-mile 

 series; 'I Allegheny or Conemaugh stage. 



Fig. 91. — f Aphelomylackis modesta. 



Front wing, about 22 mm. long. 

 IIolotype.—OAi. No. 38702, U.S.N.M. 



