Abstract
The neutral lipids and the phospholipids and their fatty acids from 2 populations of insects belonging to Dendroctonus frontalis Zimmerman (Coleoptera: Scolytidae) are compared. The populations differ significantly from one another only in the amounts of neutral lipid and in amounts of plasmalogen present. The principal phospholipid base is choline. Serine and other amino acids are present in the lipid extracts. The amount of plasmalogen present in the lipids is much larger than that usually found in insects or in other animals. The fatty acids in all lipid categories are primarily 16- and 18-carbon acids, but 14- and 15-carbon fatty acids compose 10-20% of the fatty acids in the ethanolamine phospholipids.