ANTHROCERA. 427 



wing is much more thinly scaled than the others, is fringed, however, 

 at the margin, and has almost typical neuration. It has a distinct 

 blackish border on the posterior margin of the basal half of the wing ; 

 the outer half of the wing being poorly coloured and scaled. The 

 wing is attached to the body along the line in which the first joint of 

 the leg would lie if present ; the line of junction is so great (1'") that 

 the wing must have been quite immovable when the insect was alive ; 

 and, although it has one or two slight longitudinal folds, the wing is 

 not in any way deformed. Bateson regards the evidence that a wing 

 was here substituted for a leg inconclusive, as no dissection was carried 

 out, but Richardson considers it improbable that he accidentally broke 

 off a leg (as has been suggested) and states (in litt.) that there is no 

 trace of any leg ever having been present. Richardson has another 

 specimen of A. filipendulae (from Portland) in which the middle right 

 leg is dwarfed to half its size, suggesting a probable tendency in the 

 same direction. 



Rogenhofer describes and figures (S. B. z.-b. Wien, xxxii., pp. 34- 

 35) a five-winged specimen of A. purpuralis, captured by Bohatsch in 

 July, 1882, at Griifenberg. This has on the left side, between the two 

 normally developed wings, and directly in front of the frenulum, a 

 third wing, somewhat crippled at its base and about half as large as 

 the normal hind-wing, which it resembles in shape, although having 

 the colouring of the fore-wing. The red is confined to the basal half, 

 the outer portion of the wing being blackish. The neuration is peculiar, 

 the two chief nervures are swollen at the base, run apart, and form no 

 discoidal cell; the median sends out two branches above and two 

 below, and is forked just before the outer margin ; the subdorsal and 

 inner-marginal nervures form curves, and run into the middle of 

 the inner margin. 



An equally strange aberration occurs in a female specimen of A. 

 exulans, captured by Chapman at Oberalp, in August, 1895. In this 

 specimen, the legs and usual wings are quite normal, and in their 

 usual positions, but between the left anterior wing and the meso- 

 thoracic leg are two additional winglets. The distance between the 

 wing and the leg seems to be a little greater than usual ; at a 

 distance below the wing of about a millimetre, and parallel to it, is 

 a supernumerary wing. Its length is barely a third of that of the wing 

 above it, but, structurally, it represents the basal half of a normal 

 upper wing, all the nervures being present up to nearly the end of the 

 discoidal cell, and the colour of the scales covering it fairly correspond. 

 The costa terminates in a small crumpled process, apparently repre- 

 senting the costal margin of the wing as far as the apex ; the rest of 

 the wing terminates abruptly without any definite fringe, which 

 one usually finds on the margin of congenitally abbreviated wings. 

 A second supernumerary wing arises about half a millimetre below 

 the first, still on the mesothorax. It is too defective and crumpled 

 to admit of any certain resolution of its structure, but it presents 

 several folds of wing structure that would, if they could be straightened 

 out, probably show it to be as long as the other supernumerary. It 

 also is clothed with some red scales. 



South has described and figured (Entom., xxvii., p. 253) a specimen of 

 A. trifolii, captured in Sussex by Christy, on June 18th, 1893, which, on 

 the right side, has the hind-wing entirely absent, whilst on the left side a 



