198 



ENTOMOLOGICAL NEWS. 



[September, 



such as the Lepidoptera, it may be best to use pins of a uniform 

 length throughout, long enough, however, to answer for the 

 largest. 



The time dawns upon us when collections are of little value 

 scientifically, in which the individual specimens have no other 

 label except the name. Each pin supporting an insect should 

 be long enough to also support two, or perhaps three data labels 

 at a sufficient distance apart that they may be read without 

 removal. 



Through purchases and samples of pins received from several 

 dealers, the writer has been enabled to carefully compare the 

 leading makes. A rather singular thing in connection with this 

 is that Carlsbader pins procured from different dealers vary 

 greatly in diameter and manner of numbering. To make this 

 apparent, the dimensions of pins procured from two dealers are 

 appended. 



Except in the case of the small sizes of the Klaeger japanned 

 pins, in which a number are as much as 8 mm. short, the lengths 

 given are about the average for each size. The diameters are 

 given in even 2OOOths of an inch, expressed decimally. 



Schleuter Pias, black. 



Nos. 



I 

 2 



3 

 4 

 5 

 6 



7 



8 



10 



Nos. 



I 

 2 



3 

 4 

 5 

 6 



7 

 8 



9 

 10 



Length 

 mm. 



35 



Length 

 mm. 



37 

 38 

 37 



