Constituents of the boll weevil, anthonomus grandis boheman—III lipids and fatty acids of subcellular particles of pupae

1. 1. Phospholipids were the principal lipids in the microsomes, nuclei and mitochondria of the boll weevil, Anthonomus grandis Boheman. 2. 2. The major fatty acid in the phospholipids of the boll weevil was octadecadienoic acid (18:2) followed by octadecenoic acid (18:1) and hexadecanoic acid (16:0). The weight of neural lipid varied in the subcellular particles, but the ratios of fatty acids remained the same. 3. 3. Phosphatidyl choline and phosphatidly ethanolamine were present in equal amounts in the mitochondria, and phosphatidyl choline predominated in the other subcellular particles of the boll weevil. 4. 4. Triglycerides made up about 50 per cent of the neutral lipids of the nuclei, microsomes and cytoplasm. The principal neutral lipids of the cell mitochondria were diglycerides and monoglycerides.