274 



tapering horns on the first segment, directed forwards and outwards, and 

 used as tractors when the insect moves, being altei'nately applied to the sur- 

 face to feel the way; a double dorsal series of orange-colored tubercles from 

 the second to the last segment, short, obtuse and wart-like, except those on 

 the tenth, eleventh and twelfth segments, which are longest, pointed, 

 curved and tipped with brown. On the second, third and fifth segments, on 



each side just above the line of the spiracles, 

 an elongated, nearly filiform tubercle, or short 

 horn, of a brown color, and curved down- 

 wards towards the feet; on the fourth seg- 

 ment a lateral wart-like tubercle of an orange 

 color, and corresponding with this, on the 

 remaining segments (sixth to tenth) a lateral 

 orange-colored spot. Above the insertion of 

 each of the prolegs (except the terminal pair) 

 an elongated, pointed and slightly curved 

 tubercle, and similar ones also on the tenth 

 and eleventh segments, rather longer than 

 those preceding them. 



The first pair of elongated tubercles are 

 rather soft and very movable, particularly 

 at the base, and as stated before, are used as 

 feelers; all the others are destitute of any 

 independent mobility. 



On the 21st of August a caterpillar was 

 found on the Aristolochia, much larger than 

 the foregoing; this one suspended itself on 

 the 22d, and was transformed to -a chrysalis 

 on the 23d of August, 1840; and the but- 



Fig. 37. 



Fig. 38. 



terfly (?) came out Sept. 16th, 1840; chrysalis twenty-four days. 



August 25. Five of these caterpillars were suspended in the morning, 

 and became chrysalids by the morning of the 27th; while others are also 

 suspended, and the the remainder preparing to fix themselves on the 27th; 

 all were transformed to chrysalids before the 5th of September, 1840. 



Color of Chrysalis. 

 Green. 

 Red. 



it 



Imago. 



Sept. 21. 



" 22. 



" 22. 



" 23. 



23. 



24. 



28. 



28. 



29. 



it 

 tt 

 it 



Sex. 

 S. 



S. 



<s! 



