Manchester Memoirs, Vol. Ixi. (1Q17), No. 'Z. 15 



lar to those of the left wing. The divisions of the radius 

 occupy the outer wing margin beyond the sub-costal area, the 

 median ends upon the tip of the wing in nine twigs, whilst 

 the cubitus has the same inner curve as that of the right. 



Hind 'Wing.':. — Our attempts to determine the structure of 

 the hind wings have not been successful. A few twigs of what 

 seem to be the sub-costa are shown in the left hind wing, to- 

 gether with terminal twigs of the radius, median and possibly 

 cubitus, the outer third of the radius, and a few twigs of the 

 median. The radius would appear to occu])y the whole of the 

 wing apex. Of the right hind wing, only a ])ortion of the 

 radius is distinguishable. 



Legs. — Traces of the hinder pair of legs show up through 

 the wing. The left hind leg exhibits the femur, tibia, and 

 tarsus J the elements of the latter cannot, however, be made out. 

 The femur is flat, the tibia more rounded, and only about half 

 the diameter of the femur, and it is clothed with numerous short 

 stiff bristles. The tarsus is attenuated, and appears almost 

 claw-like. The right hind leg shows very little of the femur, 

 whilst the tibia and tarsus add nothing further to that seen 

 upon the right leg. The two legs evidently still remain at- 

 tached to the iDocly, and a slight elevation at the junction of 

 the legs probably marks the end of the abdomen. The latter 

 appears like a broad flat structure, tapering from the sides to a 

 central blunted end. 



The whole body of the insect did not exceed a length of 

 24 mm., measured from the front edge of the pronotum to the 

 end of the abdomen. Thc^ width of the abdomen is 10 mm. 



Affinities. — Notwithstanding the fact that the sub-costal 

 area of the specimen does not seem to extend over more than one 

 half of the outer margin, in this respect disagreeing with the 

 generally accepted condition in Necymylacris, I refer the speci- 

 men to that genus. There is close agreement with the genus 

 in the grouping of the branches of the sub-costa, and in their 

 \'ery oblique direction. The radius forks near the base of the 

 wing, the outer branch and its divisions going to the front 

 margin, whilst the innermost divisions of the inner branch of 

 the radius pass out in almost a straight line to the wing a]>ex. 

 The median, the course of which can only be traced with diffi- 

 culty, occupies the tip of the wing, and its inner border. In 

 its position, and in sending off 3 — 4 horizontal and simi)ly 

 divided twigs, it differs very little from .V. heros, Sccl. The 

 cubitus, with its many divisions occupying all the inner wing 

 margin outside the anal area, is essentially Necymylacrid. The 

 divisions in the cubitus are more forked than in N. Villeti, Pru., 

 or N. Lafittee, Pru., and somewhat similar to what obtains in 

 .V. Godoni, Pru. From the latter, the w'ings differ m the simpler 

 form of the sub-costal, and in the more numerous divisions of 

 the radius, and in the basal branching of the latter. 



