774 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol,. XXIX. 



ACTINOMYLACRIS VICINA, new species. 



Locality. — Tremont, Pennsylvania. (Buck Mountain.) Anthracite 

 series; mammoth coal; stage ? 



Length of the front wing, 21 mm. The lirst branch of the radius 



Fig. 79.— ACTINOMYLACRIS VICINA. 



with 4 twigs, the second branch furcate, the i following offshoots 

 simple. Media with -i branches. Structure leather^", with a tendency 

 to the formation of cross wrinkles. 

 Tlolotype.—OAt. No. 3S750, U.S.N.M. 



PHTHINOMYLACRIS, new genus. 



Front wing cordate, scarcely twice as long as wide, with especially 

 strongly developed costal area, which extends about five-sevenths the 

 length of the wing, and whose bunches of veins emerge ra^^-like from 

 one point. The radius is more strongly developed and occupies nearl}- 

 the entire apical margin. Of its branches, the first separates into 2 

 or 3 twigs, while those following chiefly remain simple. The media 

 is very much reduced and sends out but 2 short simple offshoots pos- 

 teriorly toward the end of the inner border. The cubitus is also 

 strongly reduced and forms only 3 to -t branches. The anal area is 

 consequently very large, more than half as long as the entire wing and 

 more than twice as long as high. The structure can not be made out. 



Type of genus. PhthhiomyJocri^ eordlforyn'tx^ new species. 

 PHTHINOMYLACRIS CORDIFORMIS, new species. 



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



Fig. 80. — Phthinomylacris cordiformls. 



Length of the front wing, 28 mm. First bran-h of the radius fur- 

 cate. Cubitus with 4 simple brajiches. 

 LIoloty2)e.—Ca,t. No. 38770, U.S.N.M. 



