EXPLANATION OF PLATE XL 



Fig. 1. — lo, C'ilheronia irgalis, sta^e II; much enlarged; \h, section (if eiglitli abdominal i?egment; Ic, abdominal 



spine of subdorsal series. 

 Fig. 2. — 2a, C'dheronia regnlix, stage ITl; enlarged; 26, a dorsal abdominal spine. 

 Fig. 3. — Sa, Citheronia regalin, stage IV; natural size; Sb, dorsal spine of second thoracic segment. 

 •T. Bridgham, del. 



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