The Ants of the Baltic Amber. 3 



graphed the ants of the Sicilian amber ^), which is, however, of later, 

 Miocene, age and comprises a different fauna, with few genera and 

 no species common to the Baltic fauna. 



From his study of 1461 specimens, Mayr described 49 species, 

 referable to 23 genera. Emery added a single genus and species, 

 Dimorphomyrmex theryi, and Andre two species, Plagiolepis succini 

 and Vollenhovia prisca^ attributing the latter to Macromischa Roger, 

 a neotropical genus which had been adopted by Mayr for several 

 Baltic species. To this list of 24 genera and 52 species I have added 

 in the following pages 21 genera and 40 species. Allowing for certain 

 necessary changes in the definition of genera, the list of ants from 

 the Baltic amber, as it now stands, comprises 43 genera and 92 species. 

 The genera all belong to four of the five sub-families to which all 

 recent ants have been assigned, namely the Ponerince, Myrmicince, 

 Dolichoderince and Camponotincc. The following four tables give a list 

 of the species and of the number of specimens of each which have 

 passed through the hands of Mayr, Ern. Andre and myself. To these 

 is appended a fifth table giving a summary of the four subfamilies 



Table I. 



PonerincB 



Sexes Known 



.5 ^ 



H < 



'ir, 



Prionomyrmex longiceps Mayr 



Procerapachys annosus Wheeler .... 



Procerapachys favosus Wheeler 



Bradopoiiera meieri Mayr 



Ectatomma (Rhytidoponera) europseum Mayr 



Electroponera dubia Wheeler 



Platythyrca primajva Wheeler 



Euponera iTrachyraesopus) succinea (Mayr) . 



Ponera atavia Mayr 



? Ponera ^racilicornis Mayr 



Total 



9 

 8 

 1 

 11 

 3 

 I 



2 

 21 

 29 



10 

 8 

 1 



18 

 4 

 1 

 2 



24 



42 



2 I 85 ,,111 



1) Le Formiche dell'ambra siciliana ncl niuseo niineralopico deU'Univefsitil di 

 Bologna. Mem. R. Ace. Sc. 1st. Bologna (5) I, 1891. pp. 141 - IGf), 3 pis. 



1* 



