The Auts of the Baltic Amber. 
49 
overarching the pronotum and without Mayrian furrows. Epinotum 
rounded, slightly convex, without distinct basal and declivous surfaces, 
sloping, with two faint parallel ridges in the place of teeth. Petiole 
and postpetiole in profile each about as high as long, with low, rounded 
nodes; the petiole with an antero ventral tooth, the postpetiole broad 
behind and not constricted where it is attached to the gaster. Gaster 
pointed at the tip, with small genital appendages exactly like those 
of the male E. longi in shape. Legs slender. Wings broad and 
ample (4,4 mm. long); venation like that of the female. 
Surface of body and appendages apparently smooth. 
Hairs slender, short, suberect, covering the body but absent on 
the legs. Wings minutely hairy 
Dark golden brown; head and thorax largely blackish; legs and 
gaster yellowish. Wings colored like those of the female. 
Described from the following specimens: 
Three workers in the Geolog. Inst. Koenigsberg Coli., two in a 
single block of amber (B 243) containing also a small fly (Phora 
loewi Brues; type), a few small Collembola, some fragments of wood (?) 
and many bubbles. A fourth worker (B 19926) is in a clear piece 
of amber. 
Two females in the Geolog. Inst. Koenigsberg Coli., No. 447/7733 
(Mayr’s type), measuring about 5,5 mm and one (without a number) 
measuring about 6,5 mm. 
Three males, one in the Geolog. Inst. Koenigsberg Coli, (without 
a number) and two in the Klebs Coli. (K 1029 and K 4523). The 
description of the male is drawn from K 1029. 
Mayr referred this species, which he based on three female spe- 
cimens, to Pheidologeton, though he was aware that it differed from 
the living members of this genus in its much small er size. The other 
differences, which he mentions, such as the dentition of the mandibles 
and the venation of the wings, I find from an examination of spe- 
cimens of Pli. diversus and affinis in my collection, to be less impor- 
tant than he supposed, so that he is not to be blamed for his generic 
diagnosis. Emery, however, in Connection with his description of a 
male ant which he found in the Sicilian amber and called A'eromgrma 
sophice, stated that Mayr’s Pheidologeton antiquus ,,appartiene senza 
dubio allo stesso genere u , so that later writers have called it A. antiqua. 
The discovery of the worker described above makes the generic affi- 
nities of this species perfectly clear, for this phase agrees so closely 
with the worker of E. longi that the two species are almost indistinguish- 
able except by the small epinotal teeth, which are more acute and 
Schriften d. Physikal.-ökonom. Gesellschaft. Jahrgang LV. 4 
