The Ants of the Baltic Amber. 
97 
rather slender, with oblique, dentate blades. Maxillary palpi 4-jointed, 
labial palpi 3-jointed. Thorax short and compact, broadest and highest 
through the posterior portion of the pronotum and the anterior portion 
of the mesonotum, which is separated from the pronotum by a distinct 
suture and slopes back gradually to the mesoepinotal constriction which 
is long and shallow. Metathoracic spiracles neither protuberant nor 
approximated dorsally. Epinotum unarmed, short and rounded, without 
distinct base and declivity. Petiole with a large, erect, transverse node. 
Gaster large, very convex dorsally, not overh anging the petiole with 
its base. Middle and hind tibise without spurs; claws simple. 
Asympliylomyrmex balticus, sp. nov. 
Worker (Fig. 47). Length about 3 mm. 
Head as broad as long, circular, except for the posterior border 
which is straight. Eyes rather large, moderately convex. Clypeus 
convex in the middle, depressed at the corners, its anterior border 
deeply and narrowly excised in the middle. Mandibles with their ex- 
terna! borders straight at the base, convex at the tips; apical border 
with a large terminal tooth, 
a small tooth near the middle 
of the border and the basal 
portion finely denticulate. An- 
tenne rather stout; scapes 
reaching 2 — 3 times their dia- 
meter beyond the posterior 
border of the head; first funi- 
cular joint twice as long as 
broad, remaining joints, except 
the last, subequal, a little 
longer than broad. Thorax in 
profile with the pronotum 
convex, the mesonotum anteriorly convex and rising a little above the 
pronotum, then flattened and sloping behind to the rather long, shallow 
mesoepinotal constriction. Epinotum convex and rounded. Petiole higher 
than long, robust, its node as high as the epinotum, blunt above, where it 
is nearly as thick as it is below, a little broader than long, with convex 
anterior and posterior surfaces. Segments of the gaster large and con- 
vex; the tip turned under and not visible from above. Legs stout. 
Mandibles finely striated and coarsely punctate; head thorax 
and gaster subopaque, densely and finely punctate; legs and scapes 
coarsely punctate. 
Schriften d. Physikal.- Ökonom. Gesellschaft. Jahrgang LV. 
Fig. 47. Asymphylomyrmex balticus , sp. nov. 
Worker, K4305. 
7 
