278 CATERPILLARS AND THEIR MOTHS 



of backward, as do those of the Sphingidse — were 

 edged above with black. The legs and abdominal 

 props were dark brown, tlie anal props and shield hard 

 and shining, like hard rubber. The long horn on the 

 eleventh segment was light, with a dark tip. All the 

 long horns could be raised and depressed at will. 



The caterpillars ate every trace of their east skins 

 — even of the harder covering of the horns — except 

 the masks. 



On the tenth day they molted again. Their heads 

 were deep red-brown, round, and shining, as were the 

 legs and anal props. The abdominal props were 

 darker. Their bodies were as before, except black 

 patches between the thoracic segments and a black 

 transverse bar behind the third segment on the dor- 

 sum. The long horns were light with dark tips, and 

 branched, being set with small spines or " thorns." 



They ate the entire cast skin as before. They fed 

 separately from the outset, crawling away from each 

 other and the empty shells. 



The third molt came on the fourteenth day, and 

 they crawled out of their skins larger and redder than 

 before, with their thoracic horns ringed at base with 

 black. The props were very dark, with redder lines 

 down the sides, and their clasping tips (plantce) were 

 very bright orange. 



On the twenty-first day they molted for the fourth 

 time. They were three inches long, and had tan- 

 colored heads with a dark band on each side. These 

 bands extended over the dorsum of the first segment 

 between the horns. The first segment was tan-colored, 

 with a horny dorsal plate, and two light patches on 



