166 ME. H. BOLTON ON INSECT- BEMA1NS [Feb. I9II, 



beyond this point, the branch vein approaches the radius a little. 

 The main stem of the radius follows a course parallel to the 

 sub-costa, the parallelism being maintained by the first branch vein 

 and the outer branch that results from its bifurcation. The portion 

 of the radius preserved shows six branches, the first and third of 

 which are forked. Beyond the first forkiug the main stem of the 

 radius bends gently backwards, up to the middle of its length, 

 where it begins to curve very slightly forward. The general 

 direction is such, that in all probability the scapular area extended 

 a little backwards behind the apical point of the wing. 



The median vein arises quite close to, but is totally distinct 

 from, the radius. The media is the least evident of all, and its 

 course, especially in the basal half, is only determinable with diffi- 

 culty. It is slightly convex outwards in its lower half, then passes 

 straight to the apical margin. Four parallel branches are shown, 

 one or more almost certainly bifurcating before the margin was 

 reached. This is purely conjectural, the apical portion of the wing 

 being broken away. The first two-thirds of the length of the 

 media is regularly curved, the outer third passing in a straight line 

 to the margin. The distal portion of the wing being missing, the 

 full extent of the median area cannot be determined, but sufficient 

 is present to show that the area did not extend outwards to the 

 apical point, reaching the margin at about the middle distance of 

 the lower outer half of the margin. 



The cubital vein is but faintly outlined proximally, where it is 

 almost in contact with the anal vein. It gives off eight backwardly 

 directed and parallel branches, only the third showing bifurcation. 



The anal furrow is broad and shallow at the base, passing back- 

 wards to the inner margin in a narrowing groove and by a wide 

 and gentle curve. As a result, the anal area is unusually long, 

 being quite a third of the length of the wing. It is somewhat 

 convex proximally, owing to the raised, rounded inner border 

 of the anal groove, but more remotely becomes slightly hollowed. 

 Five subsidiary anal veins are distinguished, in addition to the 

 primary one. Of these, the first and second fork — the first a little 

 below the middle of its length, and the second at about two-thirds 

 of the length. All the veins are sharp and in good relief. The 

 wing-border all along the inner margin is curved ventrally, so that 

 the full course of the veins to the margin cannot be followed. Not 

 much, however, of the wing can be hidden, and probably not more 

 than three anal veins at the most are thus obscured. The whole of 

 the anal area is covered with multitudinous fine transverse wrinkles, 

 anastomosing in all directions between the veins. So abundant are 

 these branches and fusions of the wrinkles, that in some portions 

 of the area they assume a fine reticulation. 



The portion of the wing preserved has a length of 38 millimetres, 

 and a breadth of 16 at its widest part. There can be little doubt 

 that the perfect wing had a length of at least 45 millimetres, and 



