Olfactory or odor mimicry

Rothschild (1961,1964) lists several cases of odor mimicry, both Mullerian and Batesian. This raises an interesting question If a Batesian mimic develops both a noxious odor and taste that furthers the resemblance to the model (Batesian mimicry), has it not built the first of multiple-lines-of-defense and thus become an incipient Mullerian mimic  

The millipede Apheloria corrugata, as well as other species, produces hydrogen cyanide and benzaldehyde by enzymatic decomposition of the cyanohydrin adduct, mandelonitrile (equation 10.1). One can question Why benzaldehyde since all normal aldehydes add hydrogen cyanide reversibly across the C = O double bond. However, to the human nose at least, HCN and benzaldehyde have 

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