EXPLANATION OF PLATE XT. 



Fig. 1. — la, Citheronia regalis, stage II; niiu-li enlarged: l/<, wvtiiin nf eiglith abdominal segment; Ic, abdominal 



spine of subdorsal series. 

 Fici. 2. — 2(1, Cithemnin regitlix, stage III; enlarged; 2i, a dorsal abdominal spine. 

 Fio. 3. — 3f(, Citheronia ri'(jaHs, stage IV; natural size; 3?^, dorsal spine of second thoracic segment. 

 .T. Bridgham, del. 



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