Memoirs of the National Academy of Sciences . J. Bridgham, del. A. HOEN A LITH,, BALTIMORE. Larval Stages of Ichthyura apioalis (1) and var. Astoriae (2, 3.) Plate XYI. Larval sfai/cs of Ichllujura iiwlusa and albosifina. Fig. 1. Iclithi/ura inclusa, Stage I; In, side view. Fig. 2. Ichlkijura inclusa, Stage II; 2a, side view of tliird abdominal segment. Fig. 3. Ichthijura athosif/ma, Stage III?; 3a, third abdominal segment, dorsal view; 3b, the same, side view. Fig. 4. /. alhusiyma. Stage IV. Jig. .5. /. albodijma, Stage V (and last); 5a, side view. 324 PLATE XVI.

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