William Morton Wheeler 
54 
tlie latter in form, size and scnlpture, but the epinotal spines are 
somewhat more erect, the head is more slender, with less prominent 
posterior corners and the scapes 
and fnnicular joints of the antennse 
seem to be more slender. The head 
behind is not as smooth as in 
A. subterranea, but covered with a 
wide mesh-work of rugse. 
I have seen 14 workers of this 
species from the Geolog. Inst. 
Koenigsberg Coli., namely: No. 
377/7663 and 606/10092 (Mayr’s 
types), B 19363, B 245, B 18 727, 
Fig. 18 . Aphtsnognsler sommerfeldti Mayr. B 18 863, III B 249, B 250, XX 
W orkcr, K 4840. B921, B 239, B 18590, XIII 
B 305, XXB 921, XB 557, one 
without a number, and three from the Klebs Coli., namely, K 36, 
K 3533 and K 4840. 
Aphcenorjaster oliijocenica, sp. nov. 
Work er (Fig. 19). Length about 4,5 mm. 
Closely resembling the preceding but differing in sculpture and 
in the armature of the epinotum. The latter is provided with two 
blunt projections instead of teeth, the epinotal declivity is sloping and 
the mesonotum is not raised in front in the 
form of a slight abrupt convexity as in 
sommerfeldti and manv of the recent forms. 
The head is coarsely rugose, the rugse being 
more parallel in front of and more reticulate 
behind the eyes. The longitudinal rugse on 
the sides of the thorax, especially on the 
epinotum, are strong and further apart. The 
nodes of the petiole and postpetiole seem to 
be lower than in sommerfeldti. The gaster 
is rather large. The legs are loog and slender. 
Color and pilosity much as in sommerfeldti. 
Described from a single specimen (B 5461) in the Geolog. Inst. 
Koenigsberg Coli. Though the amber is much cracked this specimen 
is well-preserved and most of its characters are clearly visible. Another 
specimen, B 18 570, probably belongs to this species but is too densely 
enveloped in a white film to be identified with certainty. 
Fig. 19. 
Apliaenogaster oligocenica , sp.nov. 
Worker, B 5461. 
