116 THE ORTHOPTERA OF GUERNSEY. 



land in 1869, but it has not been recorded since. It is the 

 chief species in Northern Africa, and is probably the locust of 

 the plagues of Egypt mentioned in the book of Exodus. 



CEdipoda ccervJescens is not uncommon in several limited 

 localities on our cliffs. It is a beautiful species, the under 

 wings being bright blue bordered with black. It is fond of 

 rocky ground, and when at rest with its wings folded out of 

 sight, it is very difficult to detect from its surroundings, its 

 body and upper wings being coloured so much like them. It 

 is rather doubtful whether it has ever been taken in Great 

 Britain, although amongst the reputed British species. With 

 reference to the family of (Edipodites, Dr. Sharp says : " Some 

 striking cases of variation of colour occur amongst them. 

 In certain species the hind wings may be either blue or 

 rosaceous in colour ; it is thought that the latter is the tint 

 natural in the species, and that it is due to the mixture of a 

 red pigment with the pale blue colour of the wing, hence the 

 blue coloured wings are analagous to cases of albinism. But 

 the most remarkable fact is that this colour difference is cor- 

 relative with locality. Brunner von Wattenwyl says that the 

 blue variety of CEdipoda variabilis occurs only in a few 

 localities in Europe ; he mentions Vienna and Sarepta, and 

 that where it occurs not a single red example is to be met 

 with. Similar phenomena occur in other species in both 

 Europe and North America, and L. Brunner has suggested 

 that the phenomena in the latter country are correlative with 

 climatic conditions." 



The curious little Grasshopper, Tetix subiilata, is the 

 smallest British species. It is found not uncommonly in 

 various parts of the island. 



In conclusion, I have great pleasure in acknowledging 

 the kind assistance rendered by Mr. E. Saunders, F.E.S., and 

 the Eev. E. N. Bloomfield, F.E.S., in the determination of 

 species. 



ORTHOPTERA. 

 TRIBE 1.-EUPLEX0PTERA. 



Forfieula aurieularia, L. This is the common ear-wig, which is abundant 



everywhere in fields and gardens. 

 F. aurieularia, var. forcipata, Steph. Common on Lihou Island and the 



Island of Chapelle Dom Hue, on the west coast of Guernsey. 



TRIBE 2.— CURSORIA. 

 BLATTIDjE. 



Eetobia Panzeri, Steph. Not uncommon near the coast. Common in 

 Aldemey. 



