The Ants of the Baltic Amber. 
3 
graphed the ants of the Sicilian amber 1 ), 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 genns 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 Camyonotince. 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. 
Ponerince 
Sexes Known 
No. examined 
by Mayr 
No. examined 
by Andre 
No. examined 
by Wheeler 
Total 
No. examined 
Prionomyrmex longiceps Mayr 
? 

cf 
1 

9 
10 
Procerapachys annosus Wheeler .... 
5 
— 
cf 
— 
— 
8 
8 
Procerapachys favosus Wheeler 
S 
— 
— 
— 
— 
1 
1 
Bradoponera meieri Mayr 
5 
$ 
— 
5 
2 
11 
18 
Ectatomma (Bhytidoponera) europseum Mayr 
— 
$' 
cf 
1 
— 
3 
4 
Electroponera dubia Wheeler 
5 
— 
— 
— 
— 
i 
1 
Platythyrea primseva Wheeler 
? 
9 
— 
— 
— 
2 
2 
Euponera (Trachymesopus) succinea (Mayr) . 
— 
9 
— 
3 
— 
21 
24 
Ponera atavia Mayr 
5 
9 
cf 
13 
— 
29 
42 
? Ponera gracilicornis Mayr 
? 
— 
— 
1 
— 
— 
1 
Total 
24 
2 
85 
111 
b Le Formiche dell’ambra siciliana nel museo mineralogico dell’Universitä di 
Bologna. Mem. B. Acc. Sc. Ist. Bologna (5) I, 1891, pp. 141- 165, 3 pls. 
1 * 
