The Ants of the Baltic Amber. 
87 
This species is not a Bothriomyrmex but a typical Iridomyrmex 
very closely resembling in the form of the body certain Australian 
species, notably I. rufoniger Lowne, as Mayr observed. It has well- 
developed 6-jointed 
m axillary and 4-j ointed 
labial palpi and the 
anterior clypeal b order 
is sinuately excised in 
the middle whereas 
in Bothriomyrmex the 
maxillary palpi are 4- or 
2-j ointed, the labial 3- 
or 2-j ointed and the 
clypeal border is entire. 
Mayr’s descrip- Fig. 40. Iridomyrmex geinitzi Mayr. Worker, B 18464. 
tion and figures enable 
one to recognize all three phases of I. geinitzi without difficnlty. 
This ant is one of the most abundant in the Baltic amber and there- 
fore rarely lacking even in small collections. Mayr examined 168 speci- 
mens, Ern. Andre 80, I have 
seen in all 1041 specimens, which 
are distributed as follows: 796 
workers, 3 females and 6 males 
in the Geolog. Inst. Koenigsberg 
Coli. (B 19204, XXB 395, XXB 
6640, B 27542, B 550, B 7175, 
B 11754, XXB 56, XXB 388, 
B 18447, B 18985, B 5256, etc.) 
and 12 larvse and pupse, in all 
probability belonging to this spe- 
cies (B 18364, B 18125, B 18313 
and several without numbers); 
199 workers, one female and 5 
males in the Klebs Coli. (K 2635, 
K 5591, a 91, a 117, K 5622, 
K 6407, K 1038, K 4516, K 1086, 
K 1743, etc.), one worker in 
in the Berlin Museum (242, 276, 281, 303, 312, 304, 307, 295) 
and 13 workers in the ¥m. Haren Coli. (265, 1438, 1665, 1692, 
1650, 2433, etc.) In addition to these, and not included in the 
number 1041 recorded above, I have found in the Geolog. 
Fig. 41. Iridomyrmex geinitzi Mayr. 
a) larva; b) two pupae, B 19874. 
the Brussels Museum, 15 workers 
