Journal of Agricultural Research . Journal of Agricultural Research Washington , D . C. PLATE 6 A.—Block of ash wood used by Dudley and Beaumont in studying Kalotermes inPanama; the best type of termitarium for studying Kalotermes. B.—Coptotermes nigcr. Damage to lead sheathing of undergrjund cable and per-forations in tarred parcelling. Gold Hill, C. Z., Panama, October 29, 1916. PLATE 7 A.—Guayacan (lignum vitae) entirely disintegrated by termites; all of the woodhas been digested and excreted and then packed solid. From Balboa Shops, CanalZone. B.—Another section of the same species of wood
Journal of Agricultural Research . Journal of Agricultural Research Washington , D . C. PLATE 6 A.—Block of ash wood used by Dudley and Beaumont in studying Kalotermes inPanama; the best type of termitarium for studying Kalotermes. B.—Coptotermes nigcr. Damage to lead sheathing of undergrjund cable and per-forations in tarred parcelling. Gold Hill, C. Z., Panama, October 29, 1916. PLATE 7 A.—Guayacan (lignum vitae) entirely disintegrated by termites; all of the woodhas been digested and excreted and then packed solid. From Balboa Shops, CanalZone. B.—Another section of the same species of wood showing structure built up ofexcreted wood by the termites. Note that it is a honeycombed instead of a compactmass as in A. Lignum vitae is one of the hardest woods known in the Tropics. Termites of the Canal Zone Plate 7
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