8 AI'HORISMATA ENTOMOLOGICA. 



The following is a much more elaborate method, invented and adopted 

 by my friend, the Rev. Francis Lockey, of Swanswick Cottage, near 

 Bath, to whom, knowing how successful he had formerly been in its 

 practical operation, I wrote for particulars, which he has obligingly 

 furnished me with, as follows: — 



"Many years have elapsed since I have engaged in entomological 

 pursuits, but I most readily reply to your inquiry as to the mode 

 adopted of moth-capturing at night. 



The windows of my study, partly for this purpose, and partly to secure 

 more equable temperature, are double. Each window consists of two 

 pair of sashes, with a light muUion of wood between the interior pair. 

 To make it more clear I have sketched an horizontal section, wherein 

 A represents part of the thickness of the wall of the apartment; b and 

 <.; are sections of the outer window-frame; and d and e are sections of 

 the inner window-frame. (See plate at end.) The outer window opens 

 outwards, and the inner window inwards, as indicated by the arrows near 

 c and E. At F and g two small rings are fixed, and to these are 

 fastened cat-gut strings, marked by the dotted lines which pass through 

 the mullion h, and enable one to open and close these exterior windows 

 without the inconvenience of opening the interior. I ought to explain 

 that when the cat-gut strings are set free, (in the room,) the windows 

 open freely under the influence of a weight and lever, not shown in the 

 sketch, and in fact concealed in a trunk or box in the thickness of the 

 wall at A. The space between the two windows is about six or seven 

 inches. 



Evening ha\'ing arrived, the outer windows were allowed to open, as 

 in the sketch Fig. 2, and a lamp l placed on a shelf within the 

 inner window. This lamp was an Argand, and moreover furnished with 

 a powerful Parabolic Reflectoi', about sixteen inches in diameter. 



The moths usually announced themselves by striking against the interior 

 window, D or e. The cat-gut string at h was then pulled, (h f, h u,) 

 and the capture being thus enclosed in the space between the windows was 

 readily reduced to a closer captivity either for examination or possession. 

 On a few occasions the window has been perfectly besieged by moths, 

 and 'at one haul,' I think it was at the beginning of one July, some 

 hundreds of moths were enclosed. 



To effect this second or closer capture it was of course necessary to 

 iise only one hand, which was armed therefore with a gauzed forceps, 

 or, which I found more convenient, a large bell wine glass fitted up 



