92 MIMICRY, AND OTHER PROTECTIVE 



and armed with powerful jaws, as well as having some 

 disagreeable secretion. Some species of Eumorphidae 

 and Hispidae, small flat or hemispherical beetles which 

 are exceedingly abundant, and have a disagreeable se- 

 cretion, are imitated by others of the very distinct 

 group of Longicornes (of which our common musk- 

 beetle may be taken as an example). The extraordi- 

 nary little Cyclopeplus batesii, belongs to the same 

 sub-family of this group as the Onychocerus scorpio 

 and 0. concentricus, which have already been adduced 

 as imitating with such wonderful accuracy the bark 

 of the trees they habitually frequent ; but it differs 

 totally in outward appearance from every one of its 

 allies, having taken upon itself the exact shape and 

 colouring of a globular Corynomalus, a little stinking 

 beetle with clubbed antennae. It is curious to see how 

 these clubbed antennae are imitated by an insect be- 

 longing to a group with long slender antennae. The 

 sub-family Anisocerinae, to which Cyclopeplus belongs, 

 is characterised by all its members possessing a little 

 knob or dilatation about the middle of the antenna?. 

 This knob is considerably enlarged in C. batesii, and 

 the terminal portion of the antennas beyond it is so 

 small and slender as to be scarcely visible, and thus an 

 excellent substitute is obtained for the short clubbed 

 antennas of the Corynomalus. Erythroplatis corallifer 

 is another curious broad flat beetle, that no one would 

 take for a Longicorn, since it almost exactly resembles 

 Cephalodonta spinipes, one of the commonest of the 

 South American Hispidae ; and what is still more 



