162 MR. H. BOLTON ON INSECT-TtEMAINS [Feb. I9H, 



wing ; beyond this point the media bends backwards, and follows 

 an almost straight course to the upper third of the inner margin, 

 giving oft: four branches on its anterior side. Of these, the first 

 forks a little above the middle of the wing, and probably the rest 

 forked also ; but the wing is torn away over the hinder half of 

 the apical area, and this point cannot be determined. 



The regularity of the minor veins over the whole of the rest of 

 the wing makes this bifurcation a certainty. Up to the first 

 branching, the media is raised in moderately high relief, in this 

 respect agreeing with the basal portion of the radius. Beyond the 

 first branching, the veins become sunken, the intervening areas 

 being gently convex. The median area stretches along almost the 

 entire hinder half of the apical margin, and apparently extends 

 forward to the actual apical point. The area is much larger than 

 in A. venusta, owing to the backwardly directed main stem of the 

 media, and the short and arcuate cubitus. 



The cubitus arises in close proximity to the bases of the radius 

 and media, and gradually diverges from the latter, the divergence 

 increasing up to the point at which the fifth branch is given off, 

 after which it approaches the media very gradually, but still 

 keeping a wide interval between the two. The width of this 

 interval opposite the proximal forking of the media is especially 

 wide. Ten branches are given off from the cubitus on its inner 

 face, only one of which, the proximal one, is forked. This is also 

 a little arcuated at its point of origin, and then passes out to the 

 inner margin, bending very slightly towards the apex of the wing 

 in its outer half, as do all the rest. 



The cubital area stretches from the end of the first third of the 

 inner margin to a little within the distal third. It is much shorter 

 than in A. venusta. The first anal vein is robust, elevated in its 

 basal half, and depressed in the distal portion. It lies in the 

 middle of a deep broad valley, being widely separated from the base 

 of the cubitus and the base of the succeeding anal vein. It is 

 strongly arcuated, much more so than any of the chief veins, while 

 it is marked off from the second anal by the swollen or tumid inner 

 flank of the trough in which it lies. It reaches the margin about 

 the end of the first third of the wing. Eleven other anal veins are 

 present, which diminish in strength and also increasingly approach 

 one another backwards. They are wider apart distally on the 

 wing-margin than at their bases, so that the smaller inner veins 

 appear to pass obliquely and in straight lines to the wing- 

 margin. The inner wing-margin over the anal area is almost 

 straight. 



Viewing the wing as a whole, one is at once struck with the 

 appearance of great muscularity, shown in two oblique ridges : an 

 anterior one passes forwards and outwards, and bears upon its 

 crest the main stem of the radius, being bounded in front by the 

 base of the sub-costa, while upon its hinder face lie the bases of 

 the median and cubital veins. 



