Vol. 67.] FROM THE SOUTH WALES COALFIELD. 155 



dichotomy. Arising from the middle of the base, the vein stands 

 out in relief for a very short distance, after which it becomes and 

 continues sunken. Its general course is arcuated forward to the 

 middle of the wing, after which it bends a little inwards, and then 

 again outwards in the marginal veins of the innermost branch. It 

 divides into two equal branches at a distance of about 6 millimetres 

 from the base, and these divide again at the same level 3 mm. 

 beyond the first division. Of the four branches thus produced, the 

 outermost passes straight outwards towards the margin and parallel 

 to the main stem of the sub-costa. It appears to die out before 

 reaching the margin. The inner branch of this bifurcation passes 

 staight out to the margin, giving off two smaller veins on its outer 

 side which also reach the margin, all the three marginal veins being- 

 parallel to the sub-costa. The inner branch, which forks at the 

 same level, also possesses two dissimilar veins, the outer agreeing 

 in character with the adjacent vein of the outer branch ; that is, 

 it continues straight out to the margin, giving off two lateral veins 

 on its outer side. All these branches of the radius pursue a straight 

 course. The innermost gives off two simple brauches passing out 

 to the apex of the wing, and then forks, the outer of the two 

 resultant veins forking again. The course of the marginal branch- 

 veins of the radius is such that the radial area must have extended 

 over almost the whole of the anterior third of the wing-tip. 



The median vein is sunken along its whole length, and apparently 

 continuous with the cubitus at its base. The crumpling which the 

 base of the wing has undergone prevents accurate determination. 

 Appearances suggest that the cubitus first divides at the top of the 

 lower third of the wing, giving off a backwardly directed branch 

 which forks twice at least before reaching the hinder apical margin. 

 In all probability, the branch sends five or six veins out to the 

 wing-margin. Xear the middle of the wing, two more inwardly 

 directed veins are given off, the innermost continuing unbranched to 

 the broken edge of the wing, and the other forking before the edge 

 is reached. The vein then continues almost straight out to near 

 the apical point. The marginal portion of the median area extends 

 from the wing-apex, or a little in front of it, to the inner border, 

 of which it forms the distal portion. 



The cubitus has little if any share in the tip of the wing. The 

 cubitus is strongly curved inwards. It bifurcates soon after 

 leaving the media, the inner branch vein passing outwards and 

 inwards without division to a little distance above the middle of 

 the hinder margin. The more central branch-vein soon forks 

 again into two fairly equal divisions, the outer median one break- 

 ing up into four marginal veins, and the inner into three. The 

 marginal extent of the cubitus includes the distal third of the 

 inner wing-margin. All the veins are sunken. 



The anal area is large, broadly triangular, and convex dorsally. 

 It is marked off by a strong arcuate furrow, the anal vein standing 

 out in relief. The subordinate anal veins are very numerous. 

 They consist of (1) a short stem, which sends off a simple inner 



