The Ants of the Baltic Amber. 
69 
Tribe Tetramoriini Emery. 
Parameranoplus, gen. nov. 
Work er. Resembling Meranoplus but more primitive in structure. 
Head large, subrectangular, somewhat flattened above, convex below, 
with broadly and deeply excised posterior border and large frontal 
carinae which are continned back above the eyes as prominent ridges 
forming the mesial borders of a pair of antennal scrobes which seem 
to be much shallower than in Meranoplus. Eyes small, near the middle 
of the sides of the head. Ocelli absent. Frontal area rather large, 
deeply impressed. Clypeus not visible in the specimen. Mandibles 
large, apparently bluntly dentate. Antennse 11-jointed, scape curved 
at the base, funicnlns terminating in a 3-jointed club, which is about 
as long as the remainder of the funiculus. Thorax with pointed 
humerial angles and flattened upper surface. Promesonotal and 
mesoepinotal sutures distinct. Epinotum armed with two spines. Petiole 
and postpetiole small, the former distinctly pedunculate, the latter 
constricted behind. G-aster as large as the head, flattened dorso- 
ventrally, apparently with very large basal segment. Legs with clavate 
femora; middle and hind tibiae furnished with simple spurs. 
Parameranoplus primcevus sp. nov. 
Worker (Fig. 28). Length about 4 mm. 
Antennal scapes reaching to about 2/3 the distance from their 
bases to the posterior corners of the head; first funicular joint somewhat 
longer than broad, shorter than the 
two succeeding joints together; joints 
2 — 7 a little broader than long, joints 
8 and 9 as broad as long and toge- 
ther somewhat shorter than the ter- 
minal joint. Pronotum marginate in 
front and apparently with a raised and 
flattened circular disc on its upper sur- 
face, mesonotum semicircular, its an- 
terior border straight, joining the 
posterior edge of the pronotal disc at Fig ' 2a P^ameranoplus primaevus 
the promesono tal suture. Base of 
epinotum short and flat, extending on each side behind into the spines 
which are flat, pointed, directed backward and curved inward so that 
they seem to form a crescentic plate. Epinotal declivity abrupt and 
apparently concave. Petiole about 1% times as long as broad, gradu- 
