This method is especially recommended in the case of the fossorial wasps, the legs of which, if mounted in an ordinary spreading board, can not be properly arranged.
"Directions for Collecting and Preserving Insects"
C. V. Riley
Conspicuous among well-defended insects are the dark steely or iridescent greenish blue fossorial wasps or sand-wasps, Sphex and the allied genera.
"Darwin and Modern Science"
A.C. Seward and Others
He goes on to add: "The anterior limbs are decidedly fossorial, and the hinder suited for walking in a sub-plantigrade manner; both wholly unfitted for rapatory or scansorial purposes."
"Natural History of the Mammalia of India and Ceylon"
Robert A. Sterndale