SESIA STELLATARUM. 15 



wings and also down the strip of hindwing. The (ist) spiracular opening 

 is very narrow, with a very special dark raised posterior lip, the true 

 spiracle is fully imm. deeper than this. The metathorax and 

 hindwing are not quite as smooth as the forward portion of the 

 pupa, and the narrow rugae of the abdominal segments are well in 

 evidence without being strong enough for the pupa to be called 

 rough. Posteriorly (say on 8th) the sculpturing is by impressed 

 dots, inclined to be in transverse rows, but with a strong suggestion 

 of upholstering {i.e., a cushion pinned down by buttons at regular 

 intervals). Passing forward, the pittings are connected with fine 

 depressed lines, and the . fulnesses between seem rather fuller at 

 their posterior margins, the whole, however, as a fine wrinkling, 

 chiefly transverse. Such subsegmentation as there is, takes the 

 form of a slight variation in the character of the wrinkling, and 

 may be that and not definite subsegmentation. In front of the 

 spiracles of 5th, 6th, and 7th abdominal segments, the surface 

 slopes inwards, so that there is a slight angulation of surface, just 

 anterior to the spiracles. This surface is not differentiated by sculpture 

 except in front of spiracle on 5th segment, where it presents a 

 number of small raised brown points in about ten rows between 

 anterior margin of segment and spiracle. The rows are not 

 very regular, or at most two or three of them are ; they extend for 

 about 6mm. along the segment, 8 or 10 points to imm., fading out 

 at each end. Placed as transparent objects under a Jin. compound 

 lens, these dots look like cups facing forwards and partly flattened 

 against the surface, partly buried in it. The same examination 

 shows the general surface of the abdominal segments to have 

 regularly scattered over it small tinted chitinous discs like coins or 

 blood discs affixed. Amongst these are some that carry very minute 

 bristles on a jointed base. These are very rare dorsally, abundant 

 ventrally on 5, 6 and 7, less on 8 (abdominal). The anterior margin 

 of abdominal segments, 5, 6, 7, has a narrow border sculptured (a 

 little dimly perhaps) just like intersegmental membrane, and behind 

 this is a border, little, if at all, sculptured, except by longitudinal 

 (microscopic) striation. The first of these two structures is broad 

 on each side of venter of 6th, and here carries several hair-points, 

 the second is most marked in front of spiracles on 5, and here it 

 carries several hair-points and hairs, as it does, but less abundantly, 

 elsewhere. The horn scar is a doubtfully marked smoothed surface ; 

 microscopically it shows a crowded group of very minute dots, much 

 massed centrally, looking like, and probably being to some degree, 

 an aggregation of the skin points of the horn diminished in size, 

 the points, except in size, resembling the discs elsewhere on the 

 skin, and each with a suggested central hair-point. The scars of 

 the prolegs have similar aggregations of skin points, but are differently 

 arranged. There is, in the first place, a central clear area, then 

 behind this 8 or 10 minute skin points, like abortive hair-bases, 

 each surrounded by a large dark area, and sufficiently far apart for 

 each area to be well developed. Then, just outside the clear area, 

 is an aggregation of skin points of the same character in a dark 

 clouded area, but so close together that the central 15 or 16 are within 

 a space equal to one of the posterior dark clouds. The anal spike 

 occupies the dorsal half of the end of the ioth abdominal segment, it 



