NO. 1441. A M ERICA N FA LEO ZOIC INSECTS— HA NDL IRSCH. 767 



as long- as high. It contains a limited numl)er of compound veins. 

 The form of the wing is subelliptical, about 2it times as long as broad. 

 No distinct structure. 



Type of genus, IL'iniiniihu-i'ix clhifoiinma (Scudder). 



HEMIMYLACRIS CLINTONIANA (Scudder). 



Paromylacris cliiitoniaiKf Sci'dder, Bull. l'. S. (ieol. Surv., No. 124, 1895, p. 53, 

 pi. Ill,- fig. 6. 

 Localltij. — Clinton. Missouri. Cherokee shal(\s; Kittanning (Alle- 

 gheny) stage. 



HEMIMYLACRIS RAMIFICATA, new species. 



Locality. — Lorberry Gap, in Sharp Mountain, near Tremont, Penn- 

 S3^]vania. Anthracite series; stage 'i 



Front wing, about 22 mm. long. 8u])costa neai'ly rectilinear, not 

 reaching out much beyond half the length of the wing. Its 3 or -t 



Fig. 69.— HEMIMYLACRIS KAMIFICATA. 



branches successivel}' arise near the base. The tirst branch of the 

 radius separates into 2, the second into 3, and the third into 2 twigs. 

 The 4 branches of the cu])itus are compound. Otherwise this species 

 is like the preceding. 



Ilohtype.—C^i. No. 3S713, U.8.N.M. 



EXOCHOMYLACRIS, new genus. 



Front wing scarcely" twice as long as broad. The subcosta long, 

 somewhat curved, the costal area therefore not quite triangular, very 

 broad, and reaching almost to the tip of the wing. The tirst 5 

 branches of the subcosta arise at the base, but the 3 following ones are 

 given off from the subcosta itself. The radius continues to the middle 

 of the apical border and sends out 4 branches forward, the second of 

 which separates into three twigs. The media runs parallel with the 

 radius to the apical margin, to which it sends 3 branches posteriori}'. 

 The cubitus extends obliquel>' to the lower end of the apical border 

 and gives off 3 furcate and one simple offshoot to the posterior 

 margin. The anal area is fully twice as long as high and nearW half 

 as long as the wing; it contains about 9 veins. Structure not to be 

 distinguished. 



In respect to the costal area , this genus likewise forms a transition 

 to the archimylacrids. 



Proc. N. M. vol. xxix— 05 53 



