E. H. Sellards — Types of Permian Insects. 349 



Protereisma latum n. sp. 



A third species of this genus is present in the collection. 

 The front and hind wings in the type specimen lie together. 

 The wing membrane is of a brownish color. The wings of this, 

 as of the other species of the genus, are but slightly corrugated, 

 the cross veins weak. 



Length of front wing, 25 mm ; width, 7 l/2 mm . 



Length of hind wing, 22 mm ; width, 6 mm . ( 



Protechma acuminatum gen. et sp. n. Text figure 8. 



The shape of the wing of this genus is characteristic, the 

 apex being much more slender and pointed than in any other 

 genus of the family. The wing membrane is corrugated, 

 although not strongly so. The media joins the radius well 

 in front of the costal brace. The interpolated veins of the 

 sector arise from the lower branches. The middle division of 

 the sector forks well toward the apex. The cross veins are of 

 medium strength. 



Length of the wing, 20 mm ; width, 5 l/2 mm . . 



Prodromus rectus gen. et sp. n. Text figure 10. 



The wings of this genus are corrugated, but not strongly so. 

 The costal border is straight, the apex rounded ; the inner 

 border slightly rounded. The cross veins of the wing are 

 comparatively strong. The forking of the middle division of 

 the sector is shallow. The interpolated veins of the sector 

 arise from the lower divisions. Cubitus,, is five branched at 

 the border. Cubitus is partly obscured in the specimen illus- 

 trated. A second specimen of the species, however, has this 

 area of the wing preserved. CubituSj is seen in this second 

 specimen to give off two branches early, as is usual for the 

 family. 



Length of wing, 18 mm ; width, 5 mm . 



Pantiska elongata gen. et sp. n. Text figure 7. 



Wings corrugated, costal and inner borders straight, costal 

 brace thin. The interpolated veins of the sector arise from 

 the superior divisions ; the middle radial sector branch is 

 deeply forked. The interpolated vein of the media arises 

 from directly between the two outer branches. The cross 

 veins of the wing are numerous, regularly placed and of 

 medium strength. 



Length of wing, 16 to 17 mm ; width, 5 mm . 



Pekter arcuatus gen. et sp. n. Text figure 6. 



The wings of this species are characterized by their unusually 

 arched form. The costal brace is thin and lies close to the 



