MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



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almost entirely durk chestnut. The two dorsal prothoracic tubercles are now very short, not so 

 high as broad, and end in a group of rounded conical spinules; those on the side of tlie same 



Fig. 16. — .\rra.'iturc of Eachs imprrialis. 



.segment having the same general shape. T/>e second and third thoracic segme7its, icith the dorsal 

 horns^ noro much as in the full-gronni larva, though a little slenderer; length, 5 mm.; they are 



