24 The Butterflies and Moths of Tenerifl^e. 



treacle is placed at night on tlie trunks of trees or on 

 flov\^ers, and a lamp is placed near the sugared plants. 

 True votaries of *' sweetness and light," the moths alight 

 on the sticky mixture, and, becoming stupefied with the 

 beer and rum, as a rule fall to the ground, where they 

 can easily be caught or netted. 



Setting-boards are made of strips of wood about one 

 foot or eighteen inches in length, varying in width 

 according to the size of the specimen one wishes to pin 

 out on it. These boards are covered with sheet cork, 

 having a groove down the middle to receive the body of 

 the insect. Some boards have a flat, others a slightly 

 curved surface, and these are covered with white paper. 

 English entomologists generally use curved boards, but 

 foreign collectors prefer the flat setting-boards. These 

 latter seem somewhat preferable. 



The good appearance and value of a collection greatly 

 depend on the setting, and for this reason much care 

 and patience is required. The butterfly should be taken 

 between the thumb and finger of the left "hand, and an 

 insect-pin inserted in the middle of the thorax, bringing 

 the point slightly sloping backwards and out at the legs. 



