AMERICAN PALEOZOIC INSECTS— HAXDirRSCH. 



775 



PHTHINOMYLACRIS MEDIALIS, new species. 



Local'dij. — Port Griffith, Pennsylvania. Anthracite series; E coah 

 Length of the front wing, 25 mm. First branch of the radius 



Fig. 81 — Phthinomylacris medialis. 



divides into 3 twigs. Cubitus with 3 forked oti'shoots. 

 with 10 parallel veins. 



IIoloty]w.^Qx\A. No. 38765, U.S.N.M. 



Anal area 



CHALEPOMYLACRIS, new genus. 



Front wing of more elliptical or kidney -shaped outline, 2i times as 

 long as broad, with the costal area not very much widened at the base 

 and reaching not quite half the length of the wing; its veins all issue 

 from the subcosta near the base. Just at the base of the wing, the 

 radius divides into 2 main branches, each of which l)y repeated division 

 separates into 7 or S liranchlets, which take up nearly the entire an- 

 terior margin. The media also divides into 2 principal members, the 

 superior of which, with its 5 twigs, occupies the apical ])order, and the 

 inferior, with its veinlets directed backward, takes up the terminal 

 third of the inner margin. The feebly developed cubitus, with its 2 

 forked and 1 simple branches, occupies only a small portion of the 

 posterior border. The anal area is more than twice as long as high, 

 and extends over about tliree-sevenths of the inner margin; it contains 

 onlv 6 or 7 veins. The structure is tine-grained leathery, without 

 cross veins. 



CHALEPOMYLACRIS PULCHRA, new species. 



Locality. — Sharp Mountain Gap, 2 miles south of Tremont, Penn- 

 sylvania. Anthracite series; stage 'i 



Fig. 82. — CHALEPOMYLACRIS PULCHRA. 



Length of the front wing, 17 mm. 



lIolotype.~OAi. No. 38723, U.S.N.M. 



