PLATE I. 



PHILOSAMIA CYNTHIA [WALKERI]. 

 Larval stages. J. Bridgham del. 



Pig. 1. — Before first molt. June 12, 1890. tn the dorsal views of the first three stages, the lower lateral rows of tubercles 



are not shown, on account of confusion. They incline downward, and have seven spines, while the 



upper two rows have five spines each. 

 Fig. 2. — Second stage, June 15. A, section of sixth segment; the tubercles are drawn a little too long in this section, 

 Fig. 3.— Third stage, June 17. A, twelfth segment, lateral view. />. twelfth segment from behind. C, tubercle. 

 Fig. 4. -Fourth stage, June 24. A, dorsal tubercle. B, spiracle. C, dorsal view of sixth segment. D, lateral tubercle. 



All the spines or hairs are transparent amber color. 

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