OF ARTS AND SCIENCES. 



89 



a little shorter than those arising from the lateral tubercles of the 

 of the body. 



The anal legs are large and squarish, as in the group generally ; all 

 the legs, both thoracic aud abdominal, are pale green. The abdominal 

 legs bear each twenty crotchets. The three tenant hairs of the thoracic 

 feet are rather longer than usual. The spiracles are slightly chitinous, 

 not colored. 



The shape of the double dorsal tubercle on the 8th abdominal 

 ment is shown at Figure 10, d' ; sd, the subdorsal ones; o, a Beta much 

 enlarged, which, unlike T. polyphemus, is finely and minutely barbed , 

 a', a", ends of other seta?. 



Stage II — Moulted May 26, in the daytime. Length at firs! 

 9 mm., afterwards 10 mm. In one larva all the tubercles are of the 

 same yellowish hue ; in the other, those of the 2d and 3d thoi 

 segments are brownish at the tip, thus greatly contrasting with the 

 others. In another larva the median dorsal tubercle on the eighth 

 uromere is also colored in the same way. The head in one i- all 

 green, not yet banded with brown ; but in another the bead i partly 

 banded, i.e. in place of the two-scalloped hand are two separate short 

 scallops. 



The tubercles are now higher than before, and rough with Blender 

 conical warts which give origin to the seta-. The proth ibercles 



