The Ants of the Baltic Amber. 
27 
Male. Length (without gaster) 8 mm. 
A single imperfect specimen, XIII B 924 of the Geolog. Inst. 
Koenigsberg Coli, nnquestionably belongs to this species. It lacks the 
gaster, one antenna, the terminal joints of the other and the tips of 
the wings. Head short and broad, with ver y large, subspherical eyes 
and prominent ocelli. Mandibles small, far apart and with a single, 
acnminate tooth at the apex. Maxillary palpi very long, 6-jointed, 
labial palpi 4-jointed. Clypens convex in the middle behind, not pro- 
jecting, with straight, trans verse anterior border. Antennse very long, 
filiform; scapes very short, little more than twice as long as broad, 
somewhat thicker than the remaining joints, second joint (first funi- 
cular) broader than long, not swollen; remaining joints (8 of which 
are preserved) subequal, cylindrical, fully 6 times as long as broad. 
Thorax slender, through the wing insertions as broad as the head 
throngh the eyes. Mesonotum with distinct Mayrian furrows. Scu- 
tellum convex and rounded in the middle, broadly concave on the sides 
(as in Myrmecia). Epinotnm from above as long as broad, with con- 
cave sides and armed with two blunt teeth. Petiole, postpetiole and 
legs very similar to those of the worker. Venation almost exactly like 
that of Myrmecia in both anterior and posterior wings; apterostigma 
small. Sculpture and pilosity as in the worker, but the hairs are 
shorter and less conspicuous. Body blackish or dark brown and more 
or less decomposed. Wings somewhat yellowish. 
The long legs, strong claws and remarkable mandibles of the 
worker indicate that P. longiceps was a predaceous, and in all pro- 
bability, an arboreal ant. It seems to have been the sole survivor 
during Lower Oligocene times of a very primitive Mesozoic group of 
Ponerinse. There can be little doubt that the Myrmecice of Australia 
and the neighboring islands are the only living descendants of this 
old group. 
Tribe Cerapachyini Forel. 
Genus Procer apachys , gen. nov. 
Allied to Cerapachys, Sphinctomyrmex and Lioponera. The general 
shape of the body of the worker is that of typical species of the first 
of these genera. Mandibles convex, pointed, with oblique, toothless 
blades. Maxillary palpi 5-jointed; labial palpi 4-jointed. Frontal 
carinse prominent; erect, not covering the antennal insertions, parallel 
in front, converging behind, about 1/3 as long as the head, separated 
by a concavity as broad as the antennal scape. Cheeks with a distinct 
