The Ants of the Baltic Amber. 83 



of epinotum coarsely shagreened ; gaster and legs finely shagreened, 

 with scattered, piligerous punctures. 



Hairs on the head, thorax and gaster moderately long, erect 

 and uniformly distributed. Lower surfaces of fore femora also with 

 a few erect hairs, otherwise the legs and scapes bear only fine, ap- 

 pressed hairs or pubescence. 



Color black. 



Described from four specimens in the Geolog. Inst. Koenigsberg 

 Coll. (B 18806, type, B 18745, B 18576 and one without a number) 

 and one in the Klebs Coll. (K 5625). All of these specimens are 

 more or less enveloped in silvery air films and all show most of the 

 described peculiarities very distinctly. This species is distinguished 

 from all the other described amber Dolichoderi by the tooth on the 

 mesosternum, from D. elegans by the remarkable sculpture and the shape 

 of the epinotum, and by the latter character from any of the follow- 

 ing species of the genus. 



Dolichoderus ( Hypo(Mnea) vexillarius sp. nov. 



Worker (Fig. 37.) Length 5,5 — 6 mm. 



Closely related to D. mesosternalis, but differing in the follow- 

 ing characters: The posterior border of the head is more concave, 

 the anterior raised border of the pronotum is straight and transverse, 

 terminating in the humeri, which are distinctly, though rather bluntly 

 angular. The whole pronotum, 

 including the neck, is about as 

 long as broad. The base of the 

 epinotum rises perpendicularly 

 and convexly from the meso- 

 epinotal constriction, forming al- 

 most a right angle with the 

 latter, so that it appears much 

 shorter when seen from above 



and the concave declivity is pj^ 37 Dolichodems (Hi/podinea) 

 more perpendicular. The meso- vexillarius sp. nov. Worker, B 1689. 

 sternum bears no tooth. The 



sculpture is like that of mesosternalis, but the foveolre on the meso- 

 notum are quite as distinct as on the pronotum, though they are 

 feebler on the meso- and metapleurro. The pilosity and color are very 

 similar to those of mesosternalis. 



Described from six workers in the Geolog. Inst. Koenigsberg 

 Coll. (B 1689 type, B 18756, XXB 2137, XXB 203, XXB 222 and 



6* 



