The Ants of the Baltic Amber. 
133 
of middle and hind tibise with a 
graduated series of bristles. Pub- 
escence very short and sparse, 
indistinct or absent, except on 
the antennal funiculi. 
Deep red; body and portions 
of legs and antennae covered with 
a silver air-film. 
Described from a single, 
well - preserved specimen, XXB 
1542 in the Geolog. Inst. Koenigs- 
berg Coli. This species will not 
fit into any of the known genera 
of Camjponotince, though it is 
obviously very closely related 
to Formica. It has a peculiar 
habitus owing to the large flat 
eyes, elliptical head, with all the 
portions of its upper surface 
flush with one another, and the 
peculiar thickset thorax, with 
its large convex pronotum 
surrounding the semicircular 
mesonotum laterally and anter- 
iorly. 
Genus Fseudolasius Emery. 
Fseudolasius boreus, sp. nov. 
Worker major (Fig. 64b.) Length about 5 mm. 
Head large, nearly twice as broad as the thorax, subcordate, 
broader behind than in front and, excluding the mandibles, a little 
broader than long, with feebly excised posterior border, rounded and 
convex posterior corners and sides and convex dorsal surface. Eyes 
very small, elliptical, flat, well behind the median transverse diameter 
of the head and on its dorsal surface. Ocelli absent. Clypeus convex, 
carinate, its anterior border rounded and produced, narrowly sinuate 
in the middle, more broadly sinuate on each side. Palpi rather short 
and small. Clypeal and antennary foveae distinctly confluent. Frontal 
area distinct, triangulär. Mandibles convex, their apical borders not 
very oblique, with 7 unequal teeth. Antennae rather slender; scapes 
curved at the base, reaching a little beyond the posterior corners of 
Fig. 63. Grlaphyromyrmex oligocenicus 
sp. nov. Worker. a) head from above; 
b) body in profile. B 1542. 
