E. II Sellards — Types of Permian Insects. 163 



Lemmatophora delicosa sp. n. 



This species resembles L. typa closely, both in size and in 

 venation. M 2 is, however, three instead of two branched. 

 Length of front wing, 7 mm ; width, 2i mm . Type, No. 1050. 



Lemmatophora anomala sp. n. 



One branch of the media of this species coalesces for a short 

 distance with cnbitns. 



Length of wing, 7 to 8 mm ; width, 2^ ram . Type, No. 1089. 



lemmatophora hirsuta sp. n. 



This species is described from a specimen having the two 

 pairs of wings and the body preserved. The prothorax is 

 bordered by a membranous expansion l mm wide. The vena- 

 tion of the wings is partly obscured as a result of the two 

 pairs of wings lying together and partly over the abdomen. 

 The costal border of the front wing is thickly set with short 

 backwardly projecting spines or hairs. In other respects the 

 venation so far as can be made out agrees with that of the type 

 species of the genus Lemmatophora. 



Length of body from the prothorax to the end of the abdo- 

 men, 10 mm ; length of prothorax about 2 or 2-| mm ; length of 

 abdomen, 5^ mra ; length of front wings, 7 mm ; length of hind 

 wings about 6i mm . Type, No. 1047. 



Lemmatophora elongata sp. n. 



This species has a more slender and a longer front wing than 

 that of L. typa. 



Length of front wing, 9 mm ; width, 2| mm . Type, No. 149. 



Lisca minitta gen. et sp. n. Text figure 21. 



This is a genus of small Lemmatophoridge. The wing mem- 

 brane is scaly and resembles in texture that of Lemmatophora. 

 The radial sector originates not far from the middle of the 

 wing. It is simple and is united for a short distance with M x . 

 M ? is deeply forked. Cu x is forked. Cu 2 is simple. 



Length of front wing, 5i mra ; width, 2 mm . Type, No. 916. 



Artinska gen. n. 



The generic characters of this genus may be summarized as 

 an arched subcosta, a bifurcate radius, and a minutely scaly 

 wing membrane. 



The wing is of an elongate shape. The subcosta reaches 

 somewhat beyond the middle of the wing. Oblique branches 

 are given off from the subcosta and beyond the termination of 

 the subcosta from the radius. The sector originates at the ter- 



