Bull. U. S. B. F., 1923-24. (Doc. 953.) 



Fig. 16.— I>arva of Coptotomus interrogatm, dorsal view. Fig. 17.— Head of same enlarged, showing color pattern. Fig. 

 18.— Anterior margin of head. Fig. 19.— Portion of same, highly magnified. Fig. 20.— Larva of LaccopMlus maculosus, 

 dorsal. Fig. 21. — Larva of Acilius semisulcatus, dorsal. 



