The Ants of the Baltic Amber. 
61 
but the long epinotal spines are more erect and diverging, the 
lu et asternal angles are very prominent, acute and upturned, and 
there are no traces of spurs on the middle and hindtibise. The specimen 
marked B 18 981 is in the same block of amber with a worker of 
Iridomyrmex gcepperti, which has died with its mandibles seizing the 
tip of the right antenna of the Nothomyrmica. 
JVot/i omyrmica intermedia, sp. nov. (Fig. 24.) 
Worker. Length 4,7 mm. 
Closely resembling N. rudis and almost 
intermediate between this form and Myrmica 
longispinosa in many particulars. The eyes are 
smaller and much more convex, the epinotal 
spines somewhat more horizontal, though di- 
verging, and more slender and sinuate, and 
the metasternal angles are smaller and more 
acute than in rudis, while the reticulate ru- 
gosity of the head and thorax is less coarse 
and more like that of M. longispinosa. There 
are no spurs on the middle and hind tibise. 
This is the only character that excludes the 
species from the genus Myrmica. The hairs 
covering the body are more delicate and less 
erect than in N. rudis and quite abundant on 
all parts of the body and on the appendages. 
The color is black. 
Described from a single well-preserved 
specimen in the Geolog. Inst. Koenigsberg Coli. 
Fig. 24. 
Nothomyrmica intermedia , 
sp. nov. Worker. 
Nothomyrmica rugosostriata (Mayr). (Fig. 25 ) 
Macromischa rugosostriata Mayr, Beitr. Naturk. Preuss. I, 1868, p. 84, Taf. IV, 
Fig. 83, Dalla Torre, Catalog. Hymen. VII, 1893, p. 120; Hand- 
lirsch, Foss. Insekt. 1908, p. 876. 
Mayr described this species from two specimens. It may be 
readily distinguished from N. rudis by its somewhat smaller size 
(about 4 mm), its shorter, blunter epinotal spines, which are directed 
backward and not upward, and its sculpture; the head, thorax, petiole 
and postpetiole being longitudinally and less coarsely rugose. The 
metasternal angles are blunt. The middle and hind tibise lack spurs. 
