232 BRITISH LEPIDOPTERA. 



labrum and angles of the epicranium are quite flat, just marked out 

 and no more. The surface sculpturing is of labyrinthine wrinkling 

 over the head, thorax and appendages, becoming, on the abdominal 

 dorsum, an arrangement of pits. Over the head and pro- and 

 mesothorax, the aspect is much that of cerebral convolutions, 

 the summits being pale, the sulci dark : over the appendages the 

 sulci are more nearly transverse, and fairly regular over the antennae. 

 Poulton's line is well-marked, but the neuration, which looks obvious 

 at a rough glance, is marked only by a longitudinal arrangement of 

 some of the sulci of the wrinkling. On the abdominal segments 

 the pits tend to run together into sulci, and this is marked in certain 

 transverse lines, apparently indicating sub-segmentation, but varying 

 in clearness to a great degree in different specimens. Two lines 

 are usually seen in each segment, the first § and the 2nd i from the 

 anterior margin of the segment, sometimes presenting two distinct 

 black lines ; on the 2nd and 3rd abdominals the posterior element, 

 instead of being only 4- of the segment, or, being really i of the 

 segment, has behind it a very definite similar element that might be 

 intersegmental membrane fixed. The 7th abdominal segment has a 

 broad rounded posterior margin, as if the 8th segment, being consider- 

 ably smaller, had been well telescoped into it. The one structural point 

 by which it is clearly separable from the pupa of C. gallii is the 

 sculpturing of the prespiracular areas of the 5th and 6th abdominal seg- 

 ments; on segment 5 this area is not punctured, but. the ridges rise into 

 a series of sharp edges, transverse to the segment, and, here, the 

 ordinary rule of colouring is reversed, the sharp edges being dark 

 and the rest of the area paler (everywhere else the ridges are rounded). 

 On abdominal segment 6, the ordinary sculpture prevails; there is, per- 

 haps, one little ridge close to the spiracle. Another point of difference 

 with C. gallii is in colouring, but this is so much a matter of degree 

 that one may doubt its holding good in all cases. The colour is 

 a pale terra-cotta, varied with more or less black, which is sometimes 

 confined to the sulci and pits, but sometimes invades the general surface, 

 and a more or less ruddy tone, or a brown is sometimes evident on the 

 abdominal surface. Usually, the wings are palest, occasionally 

 they are darkest, and similar variations prevent any general 

 description as to the distribution of colour. The character of the 

 general wrinkling is much smoother in H. cuphorbiac, as if rubbed 

 down and polished, the sulci being very narrow in comparison (see 

 anted, pp. 188-189, "Pupa of C. gallii"). To distinguish the two 

 pupae (if together for comparison) it suffices to pass the finger over 

 the mesothorax, when C. gallii gives a sensation of roughness 

 in comparison with the polish of //. euphorbia* (Chapman). 

 Long and slender, very like that of a Sphingid (sens, strict.) in general 

 outline, except for the maxillary protuberance. Head, wings and 

 appendages of a dull ochreous-grey but with a slight greenish tinge ; 

 the skin rugose ; the abdominal segments transversely subdivided, 

 brown, the 7th and following segments being darker as also is the 

 smooth skin of the incisions between 4-5, 5-6 and 6-7 ; a dark medio- 

 dorsal shade runs down the centre of abdominal segments ; on ventral 

 surface of the 5th, 6th and 7th abdominals a narrow median longi- 

 tudinal fissure, and traces of the position of the larval prolegs ; the 

 cremastral horn moderately long, black-tipped, and bluntly bifid. The 



