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Summary
The authors wish to acknowledge with thanks the assistance of members of the Entomology Laboratory: Lt. Commander G. E. Bohart, H(S), USNR, G. R. Norris, CPhM and J. F. Spitzer, PhM 2/c; also members of the Parasitology Laboratory: Lt. Commander N. R. Stoll, H(S), USNR, J. S. Gunter, PhM 3/c and K. O. Kramer, PhM 2/c. We are indebted to J. H. Thrasher, CPhM, for the photographs.