96 



the caging of female Lepidoptera out of doors, in order that they 

 may oviposit on a food-plant, or that the males may be attracted and 

 canght, either for introduction with the females or for the collection. 

 The device consists in inclosing a branch of a tree in netting, care 

 being taken to avoid all creases or folds into which the insect might 

 crawl and be killed by spiders from the outside of the bag. 



760-773. BREEDING JARS. 



Much of the work of breeding insects can be most satisfactorily 

 accomplished by the use of ordinary candy jars or battery jars, or even 

 tumblers and test tubes of small size for very minute wood-boring or 

 gall-making insects. These may be covered with gauze, or, in the 

 case of nearly dry specimens, such as wood-boring insects, or galls, may 

 be inclosed with glass or cork stoppers, to prevent further evaporation 

 Tubes are also available for breeding delicate specimens, such as root 

 lice, or for inclosing the stems of plants containing internal feeders, 

 or for the reception of delicate pup?e. A large series of jars represent- 

 ing the various styles used is exhibited. 



774. INSECT PINS. 



In mounting insects for the cabinet expressly made entomological 

 pins are used. There are three principal kinds, the Klaeger, the Carls- 

 bad, and the Vienna pins. The Klaeger and Vienna pins are also 

 made japanned, for use with insects which are liable to verdigris. 

 For very minute Lepidoptera and Diptera, etc., very delicate pins are 

 used, such as the Vienna " Minutien nadeln." 



775, 776. THE INSECT PUNCH FOR CUTTING TRIANGLES. 



The mounting of insects on points, illustrated in this exhibit, neces- 

 sitates the cutting of cardboard points of various shapes to accommo- 

 date insects of different sizes, and greater accuracy and rapidity may 

 be secured by the use of a special punch similar to those used by con- 

 ductors. One of these is exhibited, also samples of three sizes of the 

 cut points. 



777. PINNING AND MOUNTING INSECTS. 



An exhibit is made illustrating the different methods of pinning in- 

 sects in the different orders, and of mounting or otherwise disposing 

 of insects for the general collection or for storage as duplicates. 



Spreading' apparatus. 



For the proper disposition of butterflies, moths, etc., for the cabinet 

 spreading boards are necessary. 



778. SPREADING BOARD FOR LEPIDOPTERA. 



The exhibit represents the form of spreading board commonly used. 

 It is made of soft white pine, with a strip of cork beneath, in which to 



