The Ants of the Baltic Amber. 
99 
and of the same breadth, the mesonotuni constricted and narrower, 
except in the middorsal region at the anterior end where it is convex. 
Metathoracic spiracles near the posterior end of the mesonotum, 
approximated in the dorsal concavity. Petiole much longer than broad, 
pedunculate in front, with a small node near its posterior end, lower 
than the length of the segment. Gaster rather large, elliptical. Sting 
not visible. Middle and hind tibise with well-developed pectinated 
main spuis in addition. to short, simple accessory spurs. Claws simple. 
JPltyomyrmex tornquisti, sp. nov. 
Work er (Fig. 48). Length about 5,5 mm. 
Denticles on apical mandibular border about 20. Antennal scapes 
reaching far beyond the posterior border of the head; first funic-ular 
joint shorter than the second, 
about l 1 /^ times as long as 
broad; remaining joints except 
the terminal of one of the an- 
tennse wanting. Thorax some- 
what narrower than the head. 
Petiole seen from above fully 
3 ‘times as long as broad, gra- 
dually increasing in breadth 
posteriorly, border of node trans- 
verse, rather sharp. 
Body smooth, apparently 
very finely shagreened. 
Erect hairs very sparse, 
visible only on the head and 
gaster. 
Mandibles with numerous 
coarse hairs on their borders 
and dorsal surface. 
Color brown, with golden 
reflections. 
Described from a single 
specimen, without a number, 
in the Geolog. Inst. Koenigsberg 
Coli. This specimen is in a rather 
unfavorable position in a block 
of amber embedded in balsam in a glass cell and the head, 
gaster and much of the ventral surface of the insect are covered 
7* 
Fig. 48. Pityomyrmex tornquisti sp. nov. 
a) Worker, SB 195, from above; 
b) head of same from the front. 
