HEMARIS DIFFINIS 75 



above, almost purple beneath, with a crest of yellow 

 on the first segment. The caudal horn was long, 

 rough, blue-black, with yellow on the sides of its base. 

 The legs, props, and spiracles were blue-black. The 

 head was round and yellow, with pink mouth -parts. 

 . Three days later they molted again, much as before, 

 l)ut the head was greener, no hairs were to be seen, 

 and the substigmatal ridge was yellower. This is the 

 ridge below the spiracles, or stigmata. Three days 

 later they molted for the third time, and were de- 

 cidedly larger. Nine of them changed to a soft choc- 

 olate-brown color, with a golden crest on the first 

 segment, and yellow at the base of the blue-black 

 horn. The others were pale green on the dorsum, 

 yellow-green on the sides, and brown on the venter, 

 with longitudinal darker brown stripes, and had no 

 ridge. Two, which molted later, had black heads, 

 light brown backs, and dark brown sides and venters ; 

 and one was golden-yellow on the dorsum and brown 

 elsewhere. All were gi^anulated with yellow-white, 

 and all had blue-black horns wdth yellow at the base. 



The fourth molt was four days later, and most of 

 the caterpillars were colored as before, except that 

 their legs and props were light, barred with brow^iish 

 black, and the spiracles were blue-black, with a white 

 dot at top and bottom, and a white circle around each 

 spiracle. The spiracles looked like the port-holes of 

 an ocean steamer. One brown caterpillar came out 

 with the head almost black and the body deep brown 

 granulated w ith white, except the first and last seg- 

 ments, which were bright orange with orange granules. 

 The legs, props, and venter were deep brown. 



