The Ants of the Baltic Amber. 
43 
joints together. The head and pronotuni are rather densely, the epi- 
notum very densely punctate. All of these characters are well shown 
in the two specimens, ex- 
c^pt the mandibles, which 
are tightly closed and in an 
unfavorable position. Both 
specimens are black, with 
the surface more or less ob- 
scured by a silvery air-film, 
and both show long, sparse, 
suberect hairs on the gaster. 
One of the specimens has 
the long sting exserted. 
Two additional specimens in 
the Geolog. Inst. Koenigs- ;pjg ip Sima Simplex Mayr. a)Worker; b) antenna. 
berg Coli. (No. 638/10245 
and one without a number) each measure about 5,5 mm. and are in 
an excellent state of preservation. 
Sima angustata Mayr. (Fig. 12.) 
Sima angustata Mayr, Beitr. Naturk. Preuss. I, 1868, p. 102, PI. V, Fig. 106, g; 
Dalla Torre, Catalog. Hymen. VII, 1893, p. 53; Handlirsch, Foss. 
Insekt. 1908, p. 872. 
This is a smaller and more slender species than the preceding, 
measuring only 3,5 — 6 mm. It also 
lacks ocelli. The mandibles are 
somewhat narrower at the mas- 
ticatory border than through the 
base, the first funicular joint of 
the antennse is longer than the 
two succeeding joints together 
and the punctuation of the head 
and thorax are somewhat sparser. 
I have seen ten workers 
which agree with Mayr’s des- 
cription, two from the Klebs Coli. 
(K. 817 and K. 794) and eight 
from the Geolog. Inst. Koenigs- 
berg Coli , namely: No. 319/7605 (Mayr’s type), XXB 29, XXB 
4164, B 261, XXB 1048, B 18545 and two without a number. The 
Fig. 12. Sima angustata Mayr. 
Worker XXB 29. 
