Journal of Lipid Research, Vol. 15, 399-405, July 1974
Copyright © 1974 by Lipid Research, Inc.
Cuticular lipids of insects. VI. Cuticular lipids of the grasshoppers Melanoplus sanguinipes and Melanoplus packardii
C. L. Soliday , G. J. Blomquist , and L. L. Jackson
Department of Chemistry, Montana State University, Bozeman, Montana 59715
The cuticular lipids of the grasshoppers Melanoplus sanguinipes and Melanoplus packardii contain 60 and 68% alkanes and 28 and 18% secondary alcohol wax esters, respectively, with lesser amounts of normal and sterol wax esters, triglycerides, alcohols, sterols, and free fatty acids. All the hydrocarbons are saturated, and four types of alkanes are present: n-alkanes, 3-methylalkanes, internally branched monomethylalkanes, and internally branched dimethylalkanes. The principal n-alkanes in both insects are C29 and C27, with a range from C21 to C33. Trace amounts of 3-methylalkanes of 28, 30, and 32 total carbons are present. The principal internally branched monomethylalkanes are C32 and C34, whereas the main dimethylalkane contains 35 carbons. The n-alkanes do not correspond in chain length to the secondary alcohols. The primary alcohols range from C22 to C32 in both insects, with C24 and C26 predominating. The fatty acids in the triglyceride and free fatty acid fractions range from C12 to C24 in M. sanguinipes and from C12 to C18 in M. packardii.
Supplementary key words methyl-branched alkanes • secondary alcohols
Submitted on October 9, 1973
Accepted on March 26, 1974
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