330 Porritt : The Yorkshire Specimen of Euholia mcBuiafa. 



watching a minute or so after my return when it struck me that the 

 young one was no longer caUing, and upon getting up and going 

 to the cage I found it empty. Moreover, the young Bat was 

 certainly nowhere in the vicinity, as 1 never heard it call again, 

 although I sat up until daybreak, listening and looking for signs 

 of it. Whether the mother succeeded in 'spiriting' it right 

 away during the few moments of my absence, or not, I cannot 

 say. 



I was exceedingly sorry to lose both the Bats in this way 

 just when I was beginning to feel confident that I should rear 

 the youngster successfully. 



On ist July 1905, Mr. Armitage and I again visited the tree 

 from which we had taken the twelve adult and one baby male, 

 and the single female, on the night of 2gth June, to ascertain if 

 those which had escaped us had returned to the same hole. On 

 this second visit we found ten Noctules in the hole, one of 

 which again escaped, whilst the nine we caught and examined 

 proved to be all males. Thus as the result of our investigation 

 of a 'breeding colony' of Noctules we have to record 21 adult 

 males, two young males, one adult female, and one which 

 escaped us, but which was presumably a second female and the 

 mother of the young one first found. 



On the face of it there seems to be a remarkable disparity 

 in numbers between the two sexes. 



Mr. Armitage and I have handled over 27 Noctules previous 

 to this, taken at different times and places, without ever getting 

 a single female. Further information and statistics on this 

 point would be interesting, and I hope that these notes may be 

 the means of arousing more interest in these creatures. If more 

 field naturalists would take up the study much fresh information 

 would soon be forthcoming as to their habits, distribution, etc. 



ENTOMOLOGY. 



The Yorkshire Specimen of Eubolia mseniata. — It is 



advisable to place on record that the specimen of Eubolia 

 mcB7iiala, taken near York by the late Mr. William Prest (see 

 * List of Yorkshire Lepidoptera, ' p. 61), which I believe since 

 the death of Mr. Prest has remained in the collection of the late 

 Dr. Philip B. Mason, of Burton-on-Trent, has now, on the death 

 of Dr. Mason, passed into the collection of Mr. Eustace R. 

 Bankes, of Corfe Castle. — Geo. T. Porritt, Huddersfield, 6th 

 October 1905. 



Naturalist, 



