260 



DARWINISM 



CHAP. 



One of the characters by which some beetles 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. 



«. Doliops .sp. (Lonsirnrn) mimics Pachyrhynclius orbifiP, (h) (a liard eurculio). 



c. Doliops ciirciilionoides mimics (d) Pacliyrhyncluis sp. 



e. Scepastus pachyrliyuclioides (a grasshoppLT) mimics (/) Apocyrtus sp. (a hard 



eurculio). 

 g. Doliops sp. mimics (It) Pachyrhynclius sp. 

 i. Phoraspis (grasshopper) mimics (/,) a Coecinella. 



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 tigiu'es. 



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

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

 a Belgian entomologist, have noticed that species of other 

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



ii 



