162 E. 71. Sellards — Types of Permian Insects. 



Lemmatophoridce, family new. 



The family Lemmatophoridse includes small insects with 

 four membranous wings as long as the abdomen. The pro- 

 notum is bordered by a membranous expansion. The mesa- 

 and meta-thoracic segments are strong. The sobcosta is 

 simple, and terminates on the costal border near or beyond the 

 middle line of the wing. Numerous oblique branches are 

 given off from the radius beyond the termination of the sub- 

 costa. The radial sector is simple to four branched. The 

 media is weak and at the base lies very close to the radius ; 

 media is two to four branched. The cubitus at the base has 

 a strong upward curve toward the media, with which it is 

 united by a few strong cross veins. Cu x is one to three 

 branched. Cu 2 is simple. The anal area is marked off by a thin 

 depressed line, and is traversed by one or two strong veins. 

 Cross veins in the wing are comparatively strong although 

 not numerous. 



The hind wings are broader and shorter than the front. The 

 anal area of the hind wing is expanded and folded. 



JLemmatophora gen. n. 



This genus of small Lemmatophoridge has elongate mem- 

 branous arched wings. The wing membrane is minutely scaly. 

 Subcosta is not arched at the base and extends beyond the 

 middle of the wing. Sector arises near the middle of the 

 wing and is simple. M x is simple. M 2 is widely forked be- 

 yond the middle of the wing, and is thin at its origin 

 from M r Cu 3 is vaulted near its origin, and is two to three 

 branched ; Cu 2 is simple. Two to four cross veins unite Rj 

 with Rs. A strong cross vein unites Rs near its origin with 

 Mj ; two to four other cross veins unite Rs and M r Ciij is 

 united at the arch with M 2 by two or three strong cross veins. 

 The anal area is traversed by two simple veins ; inner angle 

 squarose. 



JLemmatophora typa sp. n. Text figure 24. 



Subcosta is united with the border by about nine cross veins. 

 Two prominent cross veins occur between R x and Rs ; three 

 to four cross veins between Rs and M,. M 2 is branched. Cu x 

 is branched ; Cu 2 simple. The position of the main and cross 

 veins of this species are very constant. Fourteen specimens 

 are referred to the species. The branching of the main 

 veins is without essential variation as is also the position 

 and curvature of the veins. The cross veins of the wing are 

 often obscure from lack of preservation, as is also the minutely 

 scaly surface of the wing. 



Length of wing, 7 m,,i ; width, 2i mm . Type, No. 1162 

 paratypes, Nos. 30, 32, 1266, 1376, 1377, 1379. 



