VARIATIONS IN NEUTRAL LIPIDS OF DYSDERCUS KOENIGII (HEMIPTERA) DURING ITS LIFE CYCLE

The total and neutral lipids of the red cotton bug, Dysdercus koenigii F., were studied during its entire life cycle. The lipid content on the fresh weight basis was about 10 per cent. The neutral lipid content varied with age and included monoglycerides, 1,2- and 1,3-diglycerides, triglycerides, free fatty acids, sterols, and sterol esters. In the eggs monoglycerides and 1,3-diglycerides were not detected, whereas, in first and fifth instars only, 1,3-diglycerides were not observed. Triglycerides were the most predominant neutral lipid and accounted for 60 to 90 per cent of the glyceride glycerol. There were always two to three times more 1,2-diglycerides than 1,3-diglycerides. © 1969.