224 BRITISH BUTTERFLIES. 



but, of course, of a paler hue ; the neuration and dark marginal band 

 of the wing in the $ specimens, show very clearly (Frohawk). Pupa 

 skin (mounted): The empty pupal -shell is an extremely delicate, flimsy, 

 semi-transparent structure, more. so than any other Lycaenid pupa so 

 far examined, and contrasting very much with that of CallojJirys rubi 

 and other Ruralids (Theclids). One would say at once that it was 

 perfectly smooth and hairless ; this is not, however, quite the case, as 

 it has some very minute hairs, and one or two even so long as O075mm. 

 The colour is brown, but so pale that it might be called colourless, a 

 little less so towards the cremastral region. The cover of the pro- 

 thoracic spiracle is darker, and forms a distinct dark spot on the pupa, 

 and the skin-points and obsolete hair-bases in the spiracular region are 

 darker, and give a faintly darker aspect to this portion of the pupa. 

 The dorsal head-piece remains attached to the prothoracic margin ; it 

 is about 0'8mm. wide to either side of the middle line (both pieces 

 together l*6mm.); each lateral portion is triangular, 0-25mm. from the 

 middle of its margin against the prothorax to the forward angle ; it 

 possesses no hairs, lenticles, or skin-points, but has an elaborate, 

 though faint, sculpture or network of waved lines, dividing it up into 

 small cells. The prothoracic piece of one side is about 07mm. long 

 in the middle line against its fellow ; it widens outwards for about the 

 same distance to a length of about - 9mm., and then narrows about 

 equally at both margins to a point, with a total width of about l-7mm. 

 The dorsal portion has a few skin-pcints, and a good display of the 

 network of w r aved lines, but it is only on the outer (lateral) narrowing 

 portion that skin-points and lenticles are present and abundantly so 

 with a few hairs. There are perhaps 28 to 30 lenticles, and a dozen 

 hairs. The diameter of the lenticles is about O012mm. to 0-015mm. ; 

 the hairs are nearly globular, with bases about 0-006mm. across, and 

 the globe of the hair O015mm. to 0-02mm. across ; the lenticles have 

 rather faint broad margins, and dotted centres. The globular hairs 

 are very minutely spiculated all over, and belong, though not very 

 typically, to the class of umbrella- or fungus-hairs. The skin-points 

 (rosettes) are numerous, and much darker than the hairs or lenticles ; 

 they have a dark (deep brown even when much magnified) centre, 

 about 0'004mm. across, which has a central clear spot ; around it is 

 an area of nearly four times their diameter, only faintly different in 

 tint from the surrounding area; indeed, it is probable it only differs in 

 being raised, and therefore thicker; this is nearly circular, but with 

 some trace of petaloid divisions, and is hardly, perhaps, continuous 

 with the skin-lines, or network, but they always occur at places where 

 three, four, or as many as seven lines meet. The mesothorax has a 

 cover for the spiracle of the usual pattern, O'Smin. long along the 

 suture, by about 007mm. across, and consists of the usual forest of 

 mushroom -like hairs apparently soldered together. The mesothorax 

 itself has, throughout, a mesh of curved lines in a net-work, but hairs 

 and lenticles are wanting, and even skin-points are scarce ; there is a 

 line reaching backwards from just above the spiracle-cover, along 

 which there is nearly a score, elsewhere they are absent ; there is 

 one lenticle about the centre of the dorsum on each side ; there is a 

 little irregularity marking the position of wing-spine. The meta- 

 thorax has nothing beyond the usual mesh of network, except one or 

 two lenticles, and less than a dozen skin-points near its outer margin. 



