BY R. ILLIDGE AND AMBROSE QUAIL, F.E.S. 173 



mass, thus 4, 5, 6, are free segments. Abdominal segments 1 

 to 6 each have posterior and anterior parallel rows of strong 

 spines across the dorsum ; 7, 8, 9, have a single row each ; 10 

 has three lateral spines on each side. The scar of the cloacal 

 aperture appears as a postero ventral median line, the sfxual 

 organs appear as a median linear depression on the ventral sur- 

 face of 8 — 9 segments. The pro-meso-thoracic sutural spiracle 

 opening is rather large, and abdominal spiracles '-i to 7 are in 

 normal position, 8 appears as a rudimentary scar. On dehis- 

 cence the head, antennae, and mouth parts (ventral appendages) 

 separate as one piece — corresponding to that of Hepialidae — 

 the legs and wing cases remain attached loosely (divided cen- 

 trally) to the general body of the pupa. The suture with 1st 

 abdominal opens dorsally to near the tips of wing cases ventrally 

 the wing cases becoming semi-detached throughout. 



The J pupa differs from the $ in being less robust and in 

 having segments 4, 5, 6, 7, free. 



The chisel-like apparatus of the head presents a marked 

 difference from Endoxyla. 



Explanation of Plate VII. 



