EXPLANATION OF PLATE XIL 



Fig. 1. — la, dtlieronin rerjalix, stage III; 1'/, front view of liead and thoracir segments with the horns; enlarged. 

 Fk;. 2. — Citliironia regalis, stage IV, natnral size: 2((, suranal plate; 2b, anal leg. 

 J. Bridgham, del. 



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