1976] 
Silberglied & Aiello — Defensive Adaptations 
261 
Figure 3. Acyphoderes sexualis: double mimicry. A-C, ant mimicry; D-F, 
wasp mimicry, [scale, 3B = 1 cm.] 
Acyphoderes sexualis is one of the most effective mimetic 
insects we have ever encountered. When we offered the living, 
hand-held specimen to numerous visitors to the research station, 
the effect, without exception, was initial sudden withdrawal and 
surprise at our handling of it. We suggest the term “double mimi- 
cry” for cases in which a single insect resembles two distinct models 
at different times. This is not the same as “dual mimicry,” in which 
the two sexes of a species mimic different models, a situation 
