BOMBTX MORI. 467 



and fore parts of which are attached the teeth [mandibles], which are 

 two horny bodies that oppose one another equally, and open laterally or 

 from side to side, somewhat similar to a pair of nippers. The body is 

 principally round, a little flattened on the under surface, made up of 

 two parts, an anterior and a posterior : the anterior is that which is to 

 compose the chest of the animal when perfect ; the posterior, which is 

 longest, is annular, made up of eight rings, which make the belly of 

 the complete animal or moth. On the flat lower surface are placed the 

 feet, consisting of two parcels ; one, anterior, placed on that part which 

 forms the chest of the moth, and probably the situation or roots of the 

 adult feet ; the other, posterior, placed on that part which forms the 

 belly, and may be called temporary. The anterior parcel consists of six 

 feet, three on each side, as in the adult ; they are small, but of different 

 sizes, the smallest being forwards. Each foot comes to a point, which 

 is tipped with a claw. The posterior are eight in number, four on each 

 side, arising from the third, fourth, fifth, and sixth rings, so that the 

 two first rings and two last have no feet arising from them. These are 

 longer than the anterior. The tail has something similar to feet, but 

 they seem rather to be holders than for progressive motion. There are 

 on each side of the body a number of dark spots with a lighter speck in 

 the middle, ten in number on each side, one on each ring, and also one 

 on the neck close to the head. These are the openings of the air- 

 vessels. 



While in the caterpillar-state they spin silk threads from their mouth 

 by way of attachment. If the head is first removed from the object to 

 which the animal may be attached, it then holds fast by its two holders 

 at the tail ; and when these are got the better of, it has no hold : but, 

 if the tail be removed first, it fixes its head by its silk, and it is held by 

 that means, and will allow of being pulled to any length from its hold, 

 just as a spider is by means of its silk. If it be made to hang by its 

 silk, it winds or coils up this silk thread round its fore-feet ; therefore 

 it has the same power with the spider. 



Internal structure. — There is one straight canal passing from head to 

 tail, which is nearly as large when full as the whole body of the animal : 

 it is oesophagus, stomach, and gut. The oesophagus is about the eleventh 

 part of an inch in length, at the termination of which the canal becomes 

 a little thicker in its coats, but is thickest at its termination into the 

 stomach. The canal goes on without altering until within about half 

 an inch of the anus. The canal contracts, and then dilates a little, then 

 contracts again near to the anus. This part may be called intestine, 

 especially as it forms itself into that part afterwards, as will be observed 

 hereafter. On the posterior end of the stomach, or what would be called 



2h2 



