EXPLANATION OF PLATE XII. 



Fig. 1. — l«f, atheroma regalis, stage III; 16, front view of head and thoracic segments 'n-ith the horns; enlarged. 

 Fig. 2. — atheroma regalis, stage IV, natural size; 2a, suranal plate; 2h, anal leg. 

 J. Bridgham, del. 



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