Cases of Protective Resemblance, Mimicry, etc. 375 



Cceliodes didymus, F. (qtiadrimaculatus, L.), and Geuthor- 

 rhynchus nrticsa, Boh. 



These two beetles both occur on nettles and are some- 

 times found together, the Ceuthorrhynchus, however, being 

 much the rarer of the two. They bear so strong a super- 

 ficial resemblance to each other that only an experienced 

 coleopterist would distinguish between them. Mr. Beddard 

 quotes this (The Coloration of Animals, p. 221) as one 

 of his cases of apparently useless mimicry, but it may be 

 an example of syncryptic resemblance. 



Ceuthorrhynchus and Ceuthorrhynchidius. 



Many of the species in these two genera are clothed 

 with patches of brown and white scales and hairs, and, 

 when " feigning death," resemble bits of earth and other 

 inanimate objects. 



Rhinonchus. 



This genus, with its patches of yellow on a darker 

 ground, is protected in the same way. 



I now give a table of all the species mentioned in this 

 paper classified according to Professor Poulton's method as 

 brought forward in his book " The Colours of Animals," 

 and since extended. 



[For the table above referred to see pages 376 and 377.] 



