The Ants of the Baltic Amber. 
39 
Eyes minute and very near the anterior corners of the head. Mandibles 
with three or four larger apical and several very minute basal teeth. 
Clypeus moderately convex, its anterior border straight, except in the 
middle, where it has a slight, rounded projection. Antennse slender; 
scapes not reaching beyond the posterior corners of the head; first 
funicular joint about three times as 
long as broad, joints 2 — 4 as loog 
as broad, joints 5 — 10 distinctly 
longer than broad and gradually 
increasing in size; terminal joint 
large, nearly as long as the three 
preceding joints taken together. Tho- 
rax in profile nearly straight above, 
compressed laterally, especially in 
the meso- and metapleural region, 
broadest through the pronotum , which 
is somewhat longer than broad; 
mesonotum transversely elliptical, 
a little broader than long; meso- 
epinotal suture very distinct; ba.se of 
epinotum submarginate on the sides 
about as long as the declivity, into 
which it passes through a rounded 
angle. Petiole as high and as broad as the epinotum, in profile with 
straight and perpendicular anterior and posterior surfaces and evenly 
rounded node. First gastric segment somewhat narrower than the 
second. Legs of the usual shape. 
Body finely punctate-rugulose and shining, the punctures on the 
gaster very fine and more superficial than those on the head and thorax. 
Body and legs with sparse, suberect hairs, most distinct on the 
dorsal surface of the former, shorter and more reclinate on the latter. 
The head seems to be covered with short pubescence. 
Black; gaster more reddish, especially the sides and ventral 
portion of the first segment. 
Described from a single, well-preserved specimen, without a number, 
in the Geolog. Inst. Koenigsberg Coli. There can be little doubt that 
this is the worker of the species which was based by Mayr on male 
and female specimens only. This worker shows that P. atavia is distinct 
from the living P. coarctata. Concerning the former Mayr said: „Diese 
Art, besonders aber das Weibchen, stimmt mit der jetzt lebenden 
Ponera contracta Latr. so sehr überein, daß ich nicht imstande bin, 
a) Worker in profile; b) dorsal view of 
same; c) antenna. 
