The Ants of the Baltic Amber. 
101 
Plagiolepis klinsmanni Mayr. 
Plagiolepis Klinsmanni Mayr, Beitr. Naturk. Preuss. I, 1868, p. 37, Taf. I, Figs. 19, 20, £. 
P. klinsmanni Dalla Torre, Catalog. Hymen. VII, 1893, p. 172; Ern. Andre, Bull. 
Soc. Zool. France, XX, 1895, p. 82 ; Handlirsch, Foss. Insekt. 1908, p. 859. 
This is by far the most common species of Plagiolepis in the 
amber. The worker is easily recognized by its pilosity, as not only 
the whole body bnt also the scapes and legs are covered with coarse 
erect or suberect hairs. Joints 2 — 6 of the fnniculi are as long as 
broad or a little longer than broad, and the petiole has a low, thick, 
blnnt node, which is a little broader than long. The body measnres 
2,5 — 3 mm. 
I believe that I have seen the male of this species (K 1020 in 
the Klebs Coli.). It is precisely like the worker in color and size 
(2,5 mm) and the wings, though rather awkwardly glned together, have 
the typical Plagiolepis neuration. The terminal tarsal joints are large and 
dilated; the antennae resemble those of the worker bnt are 12-instead 
of 11-jointed, and the funicular joints are longer. 
I have seen 85 specimens of this species, distributed as follows: 
74 workers in the Geolog. Inst Koenigsberg Coli. (B 18 934, B 19071, 
XXB 855, B 18 658, XXB 1328, XXB 273, B 19 689, XXB 7205, 
B 5444, B 464, B 405, B 18172, XXB 1236, B 18156 etc.), one worker 
without a nnmber in the Berlin Museum and 9 workers and one 
male in the Klebs Coli. (K 2649, K 947, «93, «16, « 210, K 4313, 
K 1458, K 4045, K 4262, K 1020). I have also examined Mayr’s four 
types in the Geolog. Inst. Koenigsberg Coli. (7693/407, 9492/544, 
3895/216, and 3769/117). 
Plagiolepis künowi Mayr. 
Plagiolepis Künowi Mayr, Beitr. Naturk. Preuss. I, 1868, p. 39, Taf. I, Fig. 22, 23. $• 
P. Künowi Dalla Torre, Catalog. Hymen. VII, 1893, p. 172; Ern. Andre, Bull. Soc. 
Zool. France, XX, 1895, p. 82; Handlirsch, Foss. Insekt. 1908, p. 859. 
This species is known only from the worker form, which is smaller 
than that of klinsmanni, measuring only 1,5 — 2 mm, and much less 
pilose, though it has a few suberect hairs on the antennal scapes. Joints 
2 — 5 of the funiculi are much broader than long, and the petiolar node, 
though low and blunt, is proportionally much shorter and more com- 
pressed anteroposteriorly, than in klinsmanni. 
1 have seen 10 specimens of this ant, 5 in the Klebs Coli. (K 6404, 
K 6426, « 198, « 215, and « 216), one in the Brussels Museum and 4 in 
the Geolog. Inst. Koenigsberg Coli. (B 5258, B 19982, B 18931 and one 
without a number). I have also examined Mayr’s type (3760/108) in 
