776 



PROCElUUNGS OF THE NATIONAL MUSEUM. 



VOL. XXIX. 



BRACHYMYLACRIS, new genus. 



Front wing Iji-oadl}- cordate, li to If times as long as broad. Costal 

 area wide, more or less triangular to lancet shaped, extending three- 

 tit'ths to two-thirds the length of the wing; its veins are united into 

 ]»unches, which issue from the base. Radius with 3 to 7 offshoots 

 branching off in various ways to the anterior border. Media alwavs 

 divided into 2 equally branched principal members. Cubitus with 3 

 to 7 branches, never reaching the apical margin. Anal area always 

 less than twice as long as high and less than half as long as the wing. 

 Structure tine-grained, leathery, cross wrinkled. 



Type of genus, Brachymylacrls elongata^ new species. 



BRACHYMYLACRIS ELONGATA, new species. 



Locality. — Tremont, Pennsjdvania. Anthracite series; stage ? 

 Front wing, 16 mm. long. Radius with 4 branches, of which the 

 first and third always have three twigs, the second is furcate, and the 



Fig. 83.— Brachymylacris elongata. 



fourth simple. The superior branch of the media is divided into 6 off'- 

 shoots; the inferior into 4 twigs. Anal area WMth 9 regular veins. 

 Costal area with 8 veins, which form 3 groups. 

 Holotijpe.^OAi. No. 38753, U.S.N.M. 



BRACHYMYLACRIS CORDATA, new species. 



Locality. — Tremont, Pennsylvania. Anthracite series; stage ? 

 Front wing, ll mm. long. Radius with 3 branches, of which the 

 first forms 4 and the second 2 twigs. Media with 2 furcate, main 



F«;;. 84— Brachymylacris coRnATA, 



branches. Cubitus with 3 offshoots, the first of which is twice forked; 

 the second, furcate. Anal area with 9 m part compound veins. Costal 

 area with 13 branches divided mto 7 groups. 

 Holotypc.—Csii. No. 38752, U.S.N.M. 



