The Ants of the Baltic Araber. 
63 
long, transversely elliptical. G-aster distinctly largor than the head. 
Legs rather long, femora a d tibise distinctly incrassated and clavate, 
the middle and hind tibise without spurs. 
Mandibles and middle of clypeus apparently smooth; sides of 
clypeus indistinctly rugulose. Head longitudinally rugose, except in 
the occipital region where the rugse are more reticnlate. Pro- and 
mesonotum more coarsely reticulate-rngose. 
Epinotum and sides of petiole and post- 
petiole longitudinally and finely ragose; 
gaster, legs and summits of nodes smooth. 
Hairs on the body coarse, erect, mo- 
derately abundant, most conspicuous on the 
gaster; very short and appressed on the legs 
and antennal scapes. 
Color varying, according to the state 
of preservation, from golden brown to black. 
Described from seven specimens in the 
Geolog. Inst. Koenigsberg Coli., namely: 
No. 237/7523 (Mayr’s type), 819/10925, 
B 242, B 255, XXB 5177, XXB 1276 and 
one without a number. Mayr saw only two specimens of this species, 
neither of which showed the sculpture of the head and thorax. At 
first sight the specimens seem to be referable to Leptothorax or Pheidole. 
The species is readily distinguishable from the other members of the 
genus Nothomyrmica by its small size, the curvature of the epinotal 
spines and the strongly pedunculate petiole, a character which Mayr 
has designated in the specific name. 
lug. 26. 
Nothomyrmica petiolata Mayr. 
Worker, B1276. 
Genus Leptothorax Mayr. 
Leptothorax gracilis Mayr. 
Leptothorax gracilis Mayr, Beitr. Naturk. Preuss. I, 1868, p. 89, Figs. 89 — 92, 5 
Dalla Torre, Catalog. Hymen, VII, 1893, p. 124; Handlirsch, Foss. 
Insekt. 1908, p. 876. 
The single worker, No. 7655/369, in the Geolog. Inst. Koenigs- 
berg Coli., the ergatotype of this species, is badly decomposed and 
has apparently deteriorated since it was described by Mayr. As his 
description is rather indefinite I add a few remarks on structure and 
sculpture derived from the study of a large series of well-preserved 
specimens. The epinotal spines are shorter, stouter and less curved 
than Mayr supposed, although distinctly longer than broad at their 
bases and much further apart than long. They are directed backward. 
