94 THE ENTOMOLOGIST, 



of its length, comes a narrow translucent band of yellow, and 

 from thence to the point it is nearly black. Others, to be here- 

 after designated as caruncles, are much shorter, with a blunt 

 yellow end, or with a black speck on the tip in addition. In 

 other words, they aie like the spines, only in a short abortive 

 form. The spines are arranged systematically in three rows on 

 each side of the body as follows : — Firstly, a dorsal row about an 

 eighth of an inch from the centre of the back, and standing up 

 more or less vertically ; commencing on the second segment and 

 ending on the twelfth, thus leaving an open space down the 

 centre of the back about a quarter of an inch wide. Secondly, 

 a lateral row of shorter spines, situated just below the spiracles, 

 beginning on the first segment and ending on the eleventh ; this 

 row inclines slightly downward. The first, second, and third 

 segments also carry a long spine each, intermediate in position 

 between these two rows ; and the fourth segment a short spine, 

 or sometimes only a caruncle, in the same line and just above 

 the spiracle. 



When extended in forward motion the length of a full-grown 

 caterpillar is from 2^ to 2| inches ; but when at rest after a full 

 meal, the anterior segments are bunched up together and the 

 length averages about two inches. I cannot detect any odour, 

 either from the body or from the greenish yellow horns when 

 extruded. 



The head is of a rich hazel-brown, or blackish and polished. 

 The lateral jaws are very powerful, and as each mouthful is 

 clipped out of the harsh leaf of the Aristolochia, a distinct 

 " click " can be heard. The following detailed description 

 applies, as above stated, to a full-grown caterpillar only : — 



The first segment, behind the head, carries a pair of legs. 

 Close above the leg is a short spine, the commencement of the 

 lateral row. Above that again is a long spine projecting 

 laterally, the commencement of the intermediate row of four. 

 Immediately behind and above this spine, and in the crease 

 between the first and second segments, is a depression or fora- 

 men. On the top of the back, and reaching from spine to 

 spine, is a crescent- shaped, polished shield of the same colour as 

 the head, in front of which, and close behind the head, is a 

 yellowish lateral stripe, from which can be projected at will two 

 greenish yellow fleshy horns about three-sixteenths of an inch 

 high, cylindrical, truncated, curving slightly backwards, con- 

 nected at the base, and diverging outwards so as to form an 

 internal angle of sixty degrees. 



The second and third segments have each a pair of legs. 

 Above them a pair of yellow-tipped caruncles. Above again, a 

 pair of short lateral spines inclined downward. Above again, a 

 pair of long spines (about three-sixteenths of an inch) inclined 

 upward, forward, and outward. Lastly, the uppermost or dorsal 



