The Ants of the Baltic Amber. 
35 
ently dilated and overlap the insertions of the antennse. They are 
12-jointed. The eyes are of moderate size and placed further back 
than in most Ponerine genera. The pronotnm has a distinct humer.d 
tubercle on each side as in Paraponera, Odontoponera and some species 
of Ectatomma. The thorax is constricted in the mesoepinotal region, 
and the mesonotum form a small convex plate in front of the con- 
striction and extending forward in the median line between the postero- 
lateral portions of the pronotnm. The epinotum bears a pair of blunt 
tubercles and has a rather flat base and a concave sloping declivity, 
which is bordered on each side by a distinct ridge continuous with 
the tubercle of the same side. The petiole has a concave anterior and 
a more flattened posterior declivity, botli bordered by a sharp ridge 
on each side and meeting above in a transverse ridge at the summit 
of the node. Gaster with a distinct constriction between the first and 
second segments. Legs long. 
Electroponera dubia, sp. nov. 
Worker (Fig. 6). Length about 7,5 mm. 
With the form described in the preceding paragraph. Antennal 
scapes reaching to the posterior corners of the liead; basal funicular 
joints a little longer than broad, more distal joints as broad as long. 
Surface apparently opaque; 
thorax and petiole with parallel 
series of rugse, those on the prono- 
tum concentric with the humeral 
tubercles, those on the mesopleurse, 
sides of the epinotum and sides of 
the petiole sublongitudinal. 
Hairs erect, abundant and 
rather long, especially on the 
head, pronotum and gaster; more 
reclinate on the legs and antennal 
scapes. 
Color black. 
That this ant is quite dis- 
tinct from any of the other 
species described from the amber 
is certain, but its exact position 
in the Ponerine subfamily can 
be determined only after the discovery of additional specimens. I have 
placed it provisionally in the tribe Ect atommini. 
Fig. 6. Electroponera dubia sp. nov. 
Worker, B 18994. 
3 
