158 E. II SeUards — Types of Permian Insects. 



Liomopterum omatum sp. n. Text figures 5 and 6. 



M 2 of this species is simple. C\x 1 is three branched in the 

 front wing. The hind wing is smaller and thinner than the 

 front. The radial sector of the hind wing is four branched. 



Length of front wing, 14 mm ; width, 4 mm - Type, No. 5. 



Liomopterum extensum sp. n. 



The media of this species is four branched. Ciij is simple. 

 Length of front wing, 14 mm ; width, 4f mm . Type, No. 972. 



Uorates elongatus gen. et sp. n. Text figure 2. 



A second and a somewhat larger genus is represented by the 

 basal half of a front wing. The media divides in this genus 

 much in front of the origin of the sector. Cubitus divides back 

 of the bifurcation of media. The strong basal arch of the 

 cubitus together with its late bifurcation leaves a ]arge area 

 lying between the arch of the cubitus and the anal furrow. 

 This area is traversed and strengthened by an accessory vein 

 connecting the arch of cubitus with Cu 2 . The anal area is 

 displaced and crowded partly across the wing. It is traversed 

 as usual by two veins. 



Length of the wing (estimated), I7 mm ; width, 5 mn Y Type, 

 No. 992. 



Trobnisidce, family new. 



The wings of the Probnisidse are of coriaceous texture, the 

 membrane indistinctly wrinkled. Distantly placed cross veins 

 are present. These are strong in the basal and inner part of 

 the wing between the media, cubitus and anal veins, but are 

 elsewhere weak and indistinct. The wings are long in propor- 

 tion to their breadth. They are insufficiently braced, and were 

 evidently imperfect organs of flight. The subcosta reaches to 

 about the middle of the wing. The radius reaches to the apex. 

 The sector arises early and is simple. Media divides near the 

 base of the wing and is two to four branched. Cubitus is long, 

 not infrequently reaching well toward the apical border. A 

 variable number of inferior branches are given off by the 

 cubitus. 



The hind wings are broader than the front. The sector is 

 either detached or arises very early from the radius. The cubi- 

 tus is a deeply impressed strong vein directed obliquely toward 

 the inner border. A thin, forwardly directed, branched division 

 is given off from the middle of the cubitus. The anal area of 

 the hind wing is imperfectly known. The venation in this 

 family presents many perplexing minor variations, and is prob- 

 ably lacking in constancy. 



