Plate XXVII. 



(To be bound facing Plate XXVII.) 

 Pupal structure of Celastrina abgiolus. 



Fig. 1. — The dorsal portion of cremastral area of the pupa x 150. 



Nearly the whole of the dorsal portion is shown. At the outside of the fig. is 

 the margin of the transverse suture that crosses the combined 9th and 10th abdo- 

 minal segments ; this suture is, perchance, the anal scar. The blurred portion 

 (at lower part of fig.) is a fractured margin a little out of focus ; beyond this 

 fracture six more hooks exist, and rather more are excluded on opposite side (top) 

 of fig. Hairs are seen towards dorsum (to right), and these are more abundant on 

 the dorsal portion of conjoined segments ; it is probable that, roughly, the haired 

 portion is the 9th abdominal segment. The hooks have slightly bent stems, and 

 the hooks themselves, on either side, are not in the same plane as the stem, but 

 are twisted a little to one side. The darker spots are probably bases of hooks that 

 have been broken off in removing silk, of which a scrap remains in the right lower 

 middle of plate. The paler circles are abortive structures, but whether rosettes 

 (of netting) or lenticles is doubtful. 



Fig. 2. — Spiracular area of right side of 2nd abdominal segment x 100. 



This shows the characteristic pupal hairs, though the spiculation is merely 

 suggested in reproduction of photograph. Neither hairs nor lenticles (which are 

 numerous near spiracle), have any trace of the radiated base, which is so striking a 

 character in the larval hairs ; the lumen of the lenticles being, as usual, dotted. 

 The ribbing is obviously a special development of the minute skin tessellation. 

 The hairs and lenticles have no relation to the ribbing. The rosettes at the angles 

 of the skin-netting are well seen, presenting a convex disc divided by paler lines 

 (? grooves) radiating from the centre into (usually five) sections. 



