The Ants of the Baltic Amber. 
81 
of the head; the three basal funicular joints each about 3 times as 
long as broad, remaining joints somewhat shorter. Thorax long and 
narrow, pro- and mesonotum in profile very feebly convex above, 
the humeri rounded and sloping, mesoepinotal constriction long and 
moderately deep, bearing the prominent, approximated metathoracic 
spiracles at the middle of its 
dorsal concavity. Epinotnm about 
half as long as the combined 
pro- and mesothorax, with sub- 
equal base and declivity, the 
former in profile rising rather 
suddenly and at first convexly 
and then with a flat surface to 
a transverse ridge which sepa- 
rates it from the declivity. 
The latter slopes back obliquely 
and is only slightly concave. Petiolar node anteroposteriorly com- 
pressed, inclined forward, with rather a sharp, pointed border, convex 
anterior and concave posterior surface; posterior constricted portion 
of the petiole nearly as long as the node is high. Gaster large. 
Legs long and slender. 
Surface shining; mandible and clypeus very finely longitudinally 
rugulose ; head densely punctate and on the front, vertex and behind 
the eyes with a number of shallow foveolse. Thorax, petiole and 
gaster finely shagreened and sparsely punctate, the surface of the 
meso- and epinotum uneven. 
Hairs erect, moderately long and abundant on the head, thorax 
and gaster; scapes and legs invested with fine, appressed pubescence. 
Color black; mandibles red; whole body covered with a silvery 
air film. 
Described from a single beautifully preserved specimen (B 14126) 
in the Geolog. Inst. Koenigsberg Coli. 
This species is much more slender than D . balticus and passalomma 
and the head and thorax are of a very different shape. The eyes 
are much more convex than in balticus but much larger and less 
protruding than in passalomma. 
Dolichoderus (Hypoclinea) mesosternalis sp. nov. 
Worker (Fig. 36.) Length 5,5 — 7 mm. 
Head elliptical, excluding the mandibles fully G/g times as long 
as broad, with evenly convex sides and nearly straight posterior 
Schriften d. Physik. -Ökonom. Gesellschaft. Jahrgang LV. 6 
Fig. 35. Dolichoderus (Hypoclinea) 
elegans sp. nov. Worker, B 14126. 
