THE GENUS ACRONYCTA AND ITS ALLIES. 99 



black line which, in the larva, encircles the lozenges. This 

 is unmistakable on ii and 12. The gth and loth segments 

 often have projections representing the prolegs ; in some 

 pup£e these are so distinct as to suggest a continuance of the 

 larval structure. No hairs are found except those at the base 

 of the antennae, and of these, o)ily one is certainly made out. 

 The proboscis and intermediate legs fall short of the length of 

 the wing cases, and the extremities of the hind legs come into 

 \'iew. The boss carrying the anal armature forms a less pro- 

 jection than in other species, and would, but from analogy 

 with them, be regarded rather as merely the rounded end of the 

 pupa slightly produced. It is, however, abundantly and finely 

 wrinkled and has a full armament of spines. These consist, 

 as in the other Cuspidice, of a dorsal and ventral series. The 

 dorsal set are here subject to a multiplication (or rather 

 division), that hitherto we have seen affecting only the ventral 

 series ; on either side there is one strong spine, the largest of 

 all and three weaker ones of about frds its length. The 

 ventral set consist of g or 10 on either side, very crowded 

 together, somewhat longer than the shorter dorsal hooks. 

 The dorsal hooks bend downwards, but the ventral ones pre- 

 sent in all directions. The hollows on the dorsum of the 

 abdominal segments, which apparently exist in all the species 

 of the Cuspidice, and which I have more fully described in 

 some of them, are here especially evident in the 5th segment. 

 The cast larva skin is nearly free from hairs, which are left 

 entangled in the outer cocoon. The pupa varies, however, a 

 good deal. In not a few there are on some segments mark- 

 ings that appear to be a persistence of the diamonds on the 

 larval dorsum, and the persistence of larval prolegs though com- 

 moner in this than perhaps in any others, is really exceptional. 

 The dorsal hooks are at times single and may have one, two, 

 or more slighter companions, the ventral set may be as few 

 as five. The boss is at times more marked than as above 

 described. The hooks are very curved and entangle them- 

 selves in the silk of the cocoon as to be often broken rather 

 than be set free for examination, although the pupa does not 

 take so firm a hold of the cocoon as one would expect from so 

 abundant a supply of hooks. 



It is not unusual for this species to pass a second year in the 



pupa state. 



i^To be continued.) 



