238 THE entomologist's record. 



temporary growth and development of the antennte cannot be removed 

 by absorption, as eventually the enlargement of the mammai-y glands 

 is removed in the boy, but remain permanently impressed on the pupal 

 skin. 



Perhaps too the same hypothesis will account for the equally 

 curious condition of the wing-cases in apterous species. It is quite 

 possible, and to my mind jDrobable, that the wings are correlated with 

 the sexual organs — at any rate they are the most striking external 

 character of the mature insect, and start into existence at the same 

 time with the development of these organs. Though it may be some- 

 what extravagant, I feel tempted to liken the wings of insects to the 

 horns of the Mammalia : the one being an organ sjiecially lu'ovided for 

 locomotion, the other for defence or attack, whilst both are in abeyance 

 in early life, and both make their appearance with the advent of 

 puberty. If this view of the relationship of wings be right, that is to 

 say, if the wings be indeed correlated with the sexual organs, then the 

 singular phenomenon of the pupal wing-cases in ajDterous or semi- 

 apterous species being larger than tliose of the imago may, like the 

 case of the antennae, depend upon the superabundance and erratic 

 .stimulus of commencing puberty. 



A DAY'S ENTOMOLOGIZINC IN THE PARIS ENVIRONS 



(BAGNEUX). 

 By J. W. TUTT, F.E.S. 

 I HAD a full week to fill in between July 27th and August 3rd, and 

 determined to run over to Paris. Of course I assumed that there would 

 be no collecting to be done near Paris, and that I should find plenty to do 

 otherwise. However, I added my satchel and collecting materials to 

 my impedimenta at the last moment. I had been three days in Paris 

 before I made up my mind to go to the outskirts of the city, and with 

 this idea sauntered through the city to the Porte d'Orleans, and then 

 wandered on towards Bagneux. The sudden and unex2)ected change 

 from city to country life quite surprised me, and I was soon in the 

 midst of cultivated ground, with scarcely a trace of waste land. A field 

 of sainfoin attracted my attention, by the number of Fierh rapoi 

 hovering there. " Surely that specimen is not rapce ! " flashed through 

 my mind, and " it's hyale ! " succeeded as rapidly. I stepped off the 

 highway on to the field, a jDcrformance not difficult in Prance where 

 there are no hedges, and immediately put up Strenia clathrata, another 

 step and up flew Lytliria purpuraria, and yet another and another. I 

 had no net, nothing but six small pill-boxes, and into each of these, with 

 the aid of my hat, six moths soon found their way. Half-way across 

 the field Avas a notice forbidding further progi'ess, and I found that the 

 fields surrouiided a French fort, and I surmised that it was probable 

 that the fact of the ground being forbidden to the public made it, as it 

 evidently was, such a good locality for insects. Although I could not 

 collect these insects, I thought I could inspect the ground, and see what 

 the locality would produce, and, at the same time, I wanted to detect 

 the head-quarters of Colias hyale in that immediate neighbourhood. 

 An hoiTr's foraging into out-of-the-way corners at last landed me into 

 an entomological paradise. It was another sainfoin field in full blossom, 



