HYLES EUPHORBIA. 233 



frontal headpiece large, the antennse thickened towards the base ex- 

 tending about halfway along the costa of wings ; the maxillae wide at 

 base terminating at apices ot wings ; two pairs of legs end opposite 

 tips of antennae. The glazed eye, extending from base of ist leg to 

 base of antenna not very conspicuous. The pro- and mesothorax 

 well-developed, the metathorax very restricted. The prothoracic 

 spiracle is a conspicuous depression on the line separating the pro- 

 and mesothorax ; the ist abdominal spiracle just traceable, those 

 on the 2nd-7th abdominal segments forming narrow transverse slits 

 with conspicuous black rings, that on the 8th abdominal segment 

 inconspicuous and closed. The genital organs conspicuous on the 

 8th abdominal segment (Tutt. Described September 2 ist, 1899). 

 Poulton figures and describes (Ext. Morph. Lep. Pupa, p. 205, pi. 

 xx., figs. 22-23) ^e terminal abdominal segments of the pupa of this 

 species. Fig. 22 represents the last three segments of a male pupa, 

 seen from the right side, natural size. The rudimentary spiracle 

 and the scar of the caudal horn are seen on the 8th abdominal 

 segment. The horizontal furrow which divides the 10th abdominal 

 into a dorsal (rostral) and ventral (anal) part is unusually distinct. 

 The division is rendered especially apparent because the dorsal 

 part extends further anteriorly than the ventral, so that the 9th 

 abdominal is narrow in front of the former and becomes suddenly 

 broader in front of the latter. Fig. 23 (x 26) shows the median 

 ventral area of the 9th and adjacent parts of the 8th and 10th 

 abdominal segments, showing the <$ organ and the sculpture of the 

 surface very distinctly. The Morgan is somewhat asymmetrical. The 

 two tubercles in front of it are probably an individual peculiarity. 

 Buckler writes : " The pupa is if ins. in length, ^in. in diameter, taper- 

 ing a little from the thorax to the frontal extremity, where it is rather 

 smooth ■ the wing-cases pressed close to the body ; the abdo- 

 minal rings in tolerable relief ; the outline tapered a little 

 near the anal tip, which ends in a broad, flattish, downwards- 

 curved spike, pointed at its extremity. The colour of a dingy, 

 deep brick-red above, fading a little beneath to more of a 

 flesh colour, and thickly covered with minute blackish punctures ; 

 the wing-covers dark brownish, much freckled and finely streaked 

 with blackish, as also are the head, antenna-, eye- and leg-cases, as well 

 as the trunk-case ; the segmental divisions of the abdomen dull 

 purplish-red, and quite smooth, while the parts between them are 

 roughened by black pits or punctures on a rather shining ground ; 

 a dorsal line of the ground colour visible on the back of the thorax. 

 The spiracles black." 



Comparison of pup^e of Celerio gallii and Hyles euphorbia. — 

 Taking the examples of C. gallii before me, which may or may not be 

 typical, it is very difficult to find any definite distinction between the 

 pupae of C. gallii and H. euphorbiae. The one definite point is that the 

 peculiar sculpturing in front of the spiracles which, in the pupa of H. 

 euphorbiae, is practically confined to abdominal segment 5, in that of C. 

 gallii affects also abdominal segment 6 and quite appreciably segment 7. 

 It is on a more definitely marked off separate area, and is slightly 

 different in character, the ridges being rather closer and in more con- 

 tinuous lines, and with a more abundant supply of paler colouring, i.e., 

 more ruddy, less black. The general colouring of the pupa is darker 



