THE NATURALIST, 7907. PLATE XII. 
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1. Ova of C. flava. 2, Sub-imago C. flava. 3. a. Thoracic _} Segments—showing warts 
B. Abdominal)  C. perla---larva. 
4. Abdomen—underside—C. perla. 5. Head of C. perla. 6. Head of C. flava. 
