164 MR. H. BOLTON ON INSECT-KEMALNS [Feb. I9II, 



The specimen is much too fragmentary for any attempt at specific 

 determination. The sub- cos ta is represented by three branches, 

 two of which fork low down, and therefore presumably near their 

 points of origin. The single vein, which is the lowest, may be the 

 upper member of a forked vein similar in character to the other 

 two. The veins stand out in relief, the interspaces being flat. 

 There are indications that the outer margin was bent downwards. 



Judging from the course of the veins, which are very oblique, the 

 radial area extended for a considerable distance along the outer 

 margin. The radius is represented by three branches, the outer two 

 forking, and the fork of the first branch being at a lower level 

 than the second. The veins are sunken, well defined, and with flat 

 interspaces as in the case of the radius. The direction is almost 

 straight outwards, and there can be no doubt that the radial area 

 reached the apical point of the wing. 



The media shows five branches, the inner two converging towards 

 a common point basally. They represent, therefore, the secondary 

 branching of one of the lower offshoots. A somewhat wide interval 

 separates the radius from the media, and the interspaces between 

 the branches of the latter are narrower than those of the radius, 

 but not so narrow as those of the sub-costa, which are the smallest. 

 The general course of the media is outward and backward, the 

 direction being such as would bring the branches out upon the 

 margin behind the apical point. The median area probably included 

 the inner half of the marginal tip of the wing. 



The cubital portion of the wing is partly obscured by a much 

 wrinkled superficial layer, the wrinkles in some cases passing 

 straight across between the veins, and in others being thrown into 

 crenulated lines, the convexities of which are directed basally. 

 Some of these crenulated wrinkles pass across the interspaces from 

 one vein to another, while others stretch across two interspaces. 

 Over the two outer veins, two sets of straight wrinkles intersect one 

 another, forming a small patch of irregular network. The general 

 effect of the wrinkles is similar to that which would be produced if 

 an easily separable epidermis or superficial layer had been pushed 

 towards the base of the wing. 



The inward inflection of the wrinkles at the veins indicates that 

 the outer layer was attached at equidistant points along their 

 length, while the fact that wrinkles which dip into the veins may, 

 and occasionally do, die out in the next interspace, would seem ta 

 show that a wrinkle is a superficial corrugation, and not a lateral 

 commissure of the veins themselves. The latter view is also nega- 

 tived by the two crossed sets of wrinkles on the two outer veins. 

 Seven cubital veins are present, the four inner being simple so far 

 as shown, and the three outer arising from a common stem. The 

 interspaces are convex. There is no trace of the anal area. 



Scudder and others have commented upon the general association 

 of the wings of blattoids with leaves of Cordaites. The base of 



