AUGIADES SYLVANUS. 148 



with the antero-posterior width least in middle line (about Olmm.), 

 wider outside (about 015mm.) ; black, wrinkled in longitudinal lines, 

 but with no hairs or other features, and (in the dehisced case) is 

 continued outwards by a colourless streak which represents the covered 

 portion of the piece, and, being broken off abruptly, no doubt was 

 attached to the outer eyepiece, and possibly may occasionally so con- 

 tinue in the dehisced pupa, as this outer eyepiece separates from rest 

 of head appendages. The prothorax is about 2mm. from middle line 

 to outer margin, and l*2mm. from back to front. It carries a few 

 red hairs similar to those on head. On its anterior half it carries a 

 peculiar set of organs, that may be called lenticles, and no doubt 

 represent those on the thoracic plate of the larva. These are about 

 twelve in number on either side, four near the middle line and eight 

 further out, but not symmetrical, so there may probably be considerable 

 variation in their position in different pupaa. These organs are slightly 

 raised black circles with a brown tympanic membrane, quite translucent, 

 and producing (in dehisced pupa) a very curious effect on the black 

 plate from their translucency, looking very like the ocelli on the head 

 of a cast larva-skin. The rest of the sculpturing of the prothorax is in 

 very fine transverse waved lines. The same sculpturing obtains in the 

 mesothorax, which carries also a good many short hairs O-lmm.- 

 015mm. long perhaps, reddish, looking a rather dense forest viewed 

 laterally, but on dorsal view practically invisible. The wing- spine is a 

 slight elevation, and an outline, as of the patagia, somewhat raised, is 

 marked. The metathorax is narrow medially (07mm.), wider at outer 

 margin (l*6mm.) ; at its anterior outer corner is a slightly raised dark 

 spot. The sculpturing is still in minute waves, but these are here less 

 regular in direction, there are a good many fine short hairs. The hind- 

 wing is marked off from the metathorax by something much more than 

 usually like a suture, and the wing is darker than the rest of the 

 segment, which approaches the paler tint of the abdomen. The 

 surface of the hindwing and part of that of the forewing adjacent face 

 more than usually dorsal. This is no doubt exaggerated in this 

 specimen, being dehisced, but there is certainly a hollow angle 

 between the hindwing and the 2nd and 3rd abdominal segments. 

 The hindwing is thus well seen dorsally, much better than laterally. 

 The 1st abdominal segment is narrower than those that follow, 0*7mm., 

 compared with l*4mm. or l*5mm. of the 2nd to 7fch abdominals; the 

 width of the 5th, 6th, and 7th is doubtful, owing to breadth of incisions, 

 the 8th is about 1mm., the 9th about 04mm., very narrow, and the pen of 

 the cremaster with 10th segment, about 2-0mm., the 2nd to 8th (apart 

 from free segments) have well-marked intersegmental subsegments, 

 which are wrinkled and carry hairs like the rest of the segments. The 

 wrinklings are in fine, transverse, anastomosing, waved lines. The 

 hairs are numerous, 0*2mm. to 025mm. long, of a transparent, golden 

 colour ; to some extent in transverse rows, especially on posterior 

 half of segment. On most of the segments are oval lenticles, 

 apparently in position of i and ii ; these are sometimes absent, and 

 sometimes difficult to see, since they seem to be filled up level 

 (normally when alive ?) by a yellow matter, which, in some, is in situ, 

 in others wanting, and in a few displaced more or less, and looks like 

 (as magnified) an oval cake of beeswax. The site of iii is searched in 

 vain, but in front, and below spiracle, is another lenticle, diameter 



