The Ants of the Baltic Amber. 



133 



of middle and hind tibiae 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 Coll. This species will not 

 fit into any of the known genera 

 of Camponotince, 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. 



Fig. 63. Glaphyromyrmex oligocenicus 



sp. nov. Worker, a) head from above; 



b) body in profile. B 1542. 



Genus JPseudolasius Emery. 

 Psetidolasiiis horetis^ 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 

 l)roader 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 fovese distinctly confluent. Frontal 

 area distinct, triangular. Mandibles convex, their apical borders not 

 very oblique, with 7 unequal teeth. Antenna? rather slender; .scapes 

 curved at the base, reaching a little beyond the posterior corners of 



