Gases of Protective Resemblance, Mimicry, etc. 373 



grey-green foliage of the sea-shore, it is well protected by 

 colour." 



Hypcra fasciadata, Herbst. 



This species, with its variegated markings, is very diffi- 

 cult to see under the Erodium plants on the sand where it 

 occurs. 



Cleonus sidcirostris, L. 



Mr. Holland has taken specimens of this beetle of a 

 reddish colour upon the red sands of Boars Hill, near 

 Oxford. The insects harmonised well with the ground on 

 which they occurred, and were very different in colour 

 from the ordinary grey forms that occur at Deal, etc. 

 This is a very interesting case, and, as pointed out by 

 Professor Poulton (Trans. Ent. Soc, 1899, p. 430), it is 

 reasonable to suppose that these colours, which certainly 

 harmonise with the ground of each locality, are protective. 



Limobius mixtus, Boh. 



I think I have found a parallel case to Mr. Holland's 

 red Cleonus sidcirostris in Limobms mixtus. At Deal, 

 where it is found at the roots of Erodium on the sand- 

 hills, it is of a yellow colour well suited to its surroundings. 

 Last April I took two specimens on the Chesil Beach, 

 among the white pebbles, of a white colour. Of course 

 further specimens are required to prove this case, but no 

 doubt many such cases will be found when looked for. 



Lixus paraplecticus, L. 



This curious beetle, which occurs on Sium latifolium at 

 Wicken, etc., looks very much like some of the attenuated 

 bugs one sees on rushes and water-plants. 



Hylobius abietis, L., Pissodes pini, L., and P. notatns, F. 



Of these beetles Mr. Holland says : " They are found on 

 fir trees, and being patched and dotted over with yellow, 

 look like objects which are characteristic of their sur- 

 roundings." 



Plintkus caliginosus, F. 



This species may be quoted as another instance of 



