AN ANALYTICAL KEY TO THE GENERA OF THE 
FAMILY FORMICIDZE, FOR THE IDENTI- 
FICATION OF THE WORKERS. 
CARLO EMERY. 
(Translated by WILLIAM MORTON WHEELER.!) 
SINCE the publication by Mayr, in 1865, of the volume on 
the Formicidz of the voyage of the JVovaza, no comprehensive 
work has appeared which could be of service in the identifica- 
tion of the genera of this family. The number of these genera 
has increased considerably in the mean time, and the defini- 
tions formerly given by Mayr for a number of them are no 
longer exact, as their characters have been modified by the 
discovery of new species. Moreover, certain genera have been 
subdivided, others fused together; and all of this is to be 
found scattered about in a host of detached publications, so 
that it is almost impossible for any one who is not a consum- 
mate specialist to find his way about in the labyrinth. 
I originally began, for my own personal use, to construct 
analytical tables for the workers of the subfamilies Myrmicinz 
and Ponerinz ; but I now believe that I would render a serv- 
ice to entomologists by publishing these tables, after having 
revised and completed them. I have added tables of the 
genera of the other subfamilies, together with a table of the 
characters of the subfamilies themselves, likewise in analytical 
form 
l For the present authorized translation Professor Emery has carefully revised 
the tables of the Myrmicinz, Dolichoderine, and Camponotine, of his “Clef 
Analytique des Genres de la Famille des Formicides, pour la Determination des 
neutres ” (Ann. Soc. Entomol. Belgique, tome xl (1896), pp. 172-189), and has, more- 
Over, permitted me to translate the as yet unpublished German table for the 
Dorylinz and Ponerine which he has been preparing for Das Thierreich. The 
WOrk has thus been brought up to date and cannot fail to be of great service to 
myrmecologists the world over. — W. M. WHEELER. 
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