MEETINGS. 117 



descendants of the partly evolved winged insects. The cause 

 of the changes indicated, which have a profound bearing 

 on insect metamorphoses, was the gradual and progressive 

 development due to the occasional use of gill-tracheae as aids 

 to locomotion in air, from the surface of one pond to another 

 during the mature stages of the then aquatic insects during 

 the pairing time. 



Monthly Meeting held August 11th, 1891, Mr. A. Collenette 



in the chair. 



The minutes of the last meeting having been read and 

 signed, the Rev. D. Cann was unanimously elected member of 

 the Society. 



Mr. Luff exhibited a specimen of a foreign beetle caught 

 at his shop in the Bordage. It is supposed to have been 

 introduced among foreign timber. 



The Hon. Sec. then read a short but important paper by 

 Rev. E. Hill, F.G.S., on "Mica Trap Dykes in the Channel 

 Islands." An unanimous vote of thanks was passed to the 

 author for this interesting contribution which will be found 

 printed at length in the following pages. 



Mr. Cooper contributed a number of remarks culled from 

 various sources upon the habits and peculiarities of the 

 Cuckoo, elucidating many points which had not been dealt 

 with in the papers recently read before the Society. The 

 various theories and opinions brought forward by different 

 observers served to show that much has yet to be learnt 

 respecting the economy of this curious bird. The members 

 were much indebted to Mr. Cooper for his interesting paper. 



Monthly Meeting held September 22nd, 1891, Mr. W. M. Cooper 



in the chair. 



The minutes of the last meeting having been read, 

 approved and signed, Mr. Luff exhibited two specimens of 

 the Convolvulus Hawk Moth (Sphinx Gonvolvuli) which is 

 plentiful this year. Last year no captures were recorded 

 here. 



Mr. Collenette, on behalf of Colonel Collings, exhibited 

 two fragments of pottery, a number of flint chips, and a 

 fragment of bone of a whale found by this latter gentleman 

 in the ancient rubble bank behind the running targets at 

 Grandes Rocques. Colonel Collings has also found two fire 

 holes in the bank of the Albecq Road cutting. 



