PLATE 2 g. A. Male (upper figure) and female (lower figure) of seventeen-year cicada (Cicada 

 septende dm), often inaccurately called "seventeen-year locust." x. Stridulating organ of the male. 

 It is absent in the female. B. Males and female (middle figure above) of staghorn beetle (Lucanus 

 damd). These figures illustrate not only the difference between the sexes, but also the variation in 

 size among the males. 



