1882;] 249 



colour bearing the orange tubercles with black bristly apices except 

 on the thoracic segments, where the black bands are broadest and only 

 broken below, as on theui the upper tubercles are completely sur- 

 rounded with black ; all the legs are white marked with black. 



After the fourth moult the length in two days is 31 mm., and 

 in five more days is 46 mm. and very stout, its size and beauty of 

 colouring being now at their greatest ; the thoracic segments swell 

 upward in a rounded arch from the fourth which is the largest, and 

 viewed from above sharply taper thence to the head, which is the 

 smallest, and bends downwards ; the colour of the head is bright 

 yellow with a black oval spot on the face and two black streaks down 

 either side, the ocelli in a black patch below, the mouth marked with 

 black in the centre and on each side, papillae whitish ; on the front 

 marginal ridge of the second segment occur two orange spots and two 

 black spots in front of them close to the head, and between these 

 pairs of spots is the concealed orifice from whence the retractile soft 

 fleshy horns of pinkish-red colour dart forth when irritated, and when 

 seen at this period are uniformly stout with blunt diverging extremi- 

 ties ; the ground-colour of the smooth skin of the body is a very 

 brilliant pale yellow-green, becoming white on the belly and ventral 

 feet, the segmental divisions widely banded with deep purplish edged 

 with velvety-black, and across the middle of each segment is a broad 

 velvety-black band covered with excessively fine bristly pubescence, 

 and bearing the orange tubercle of the upper row near the front 

 margin, and sometimes also that of the middle row ; but generally 

 this transverse black band is interrupted by an isthmus (so to speak) 

 of the ground-colour which bears this tubercle ; and below there is 

 always a slanting isthmus of ground-colour bearing the lower tuber- 

 cle ; on the third and forth segments the broad bands have only 

 this lower interruption, and bear the orange warts of the two upper 

 rows (here diminished in size) in their middle ; the anterior legs are 

 white with black tips and joints ; the ventral legs have each a narrow 

 streak in front, a spot behind, and a large crescentic mark of black 

 above the white feet which have dark hooks ; on the anal legs this 

 black mark is purplish in the middle ; the spiracles are blackish-slate 

 colour situate within the lower parts of the black bands ; the whitish 

 belly has a central series of blackish blotches, and narrow transverse 

 bands in the deeply sunk divisions. 



The pupa, when come to its full colour, is pale yellow on the back 

 and abdomen, and delicate light green on the head and wing-covers. 



Emsworth : February 28tk, 1882. 



