260 



DARWINISM 



CHAP. 



One of the characters hy which some lieetles are protected 

 is excessive hardness of the elytra and integuments. Several 

 genera of weevils (Curculionida') are thus saved from attack, 

 and these are often mimicked by species of softer and more 



Fig. 27. 



a. Doliops sp. (Longicorn) mimics Pacliyrhynchus orbifaj, (b) (a hard curculio). 



c. Doliops curculionoides mimics (rf) Pacliyrhynchus sp. 



e. Scepastus pachyrhyuchoides (a grasshopper) mimics (/) Apocyrtus sp. (a hard 



curculio). 

 g. Doliops sp. mimics (h) Pachyrhynchus sp. 

 i. Phoraspis (grasshopper) mimics (k) a Coccinella. 



All the above are from the Philippines. The exact correspondence of the colours 

 of the insects themselves renders the mimicry much more complete in nature than it 

 appears in the above figures. 



eatable groups. In South America, the genus Heilipus is one 

 of these hard groups, and both Mr. Bates and M. Roelofs, 

 a Belgian entomologist, have noticed that species of other 

 genera exactly mimic them. So, in the Philippines, there 



