The Ants of the Baltic Amber. 
117 
with the anterior border feebly excised. Legs shorter and stouter than 
in E . brischkei. 
The surface of the body is more opaque and seems to be more 
coarsely shagreened or coriaceous. 
The erect hairs are short, extremely few in nnmber and confined 
to the mandibles and tip of the gaster. There are traces of short 
sparse pnbescence on the scapes, pronotum and gaster. 
Color brown; legs slightly paler. 
Described from a single specimen (B 18 730) in the Geolog. Inst. 
Koenigsberg Coli. It is in a fair state of preservation and shows all parts 
of the body clearly. In the form of the thorax and petiole and the shorter 
appendages this species is much like a Gesomyrmex but the structure 
of the head and antennse leave no doubt that it is a true Ecophylla . 
Besides E. brischkei and brevinodis a third species of (Ecophylla 
is known from the Sicilian amber, namely CE. sicida Emery. This 
form closely approaches the recent (E . smaragdina in having very long, 
thin legs and antennse. The funiculi, however, have the first and 
second joints subequal as in the Baltic amber species. We may, there- 
fore, arrange these four species in the following Order, according to 
the increasing length of the legs, antennse, petiole, mesoepinotal con- 
striction etc. : brevinodis , brischkei, sicula and smaragdina, the last 
being the most specialized, while sicula of the upper Miocene, is more 
recent geologically than the Baltic amber species and therefore most 
nearly related to the recent form. The occnrence of three other species 
of Ecophylla in the Miocene shales of Europe (E. obesa radobojana Heer 
and an nnnamed species at Radoboj in Croatia and Oe. prceclara Förster 
at Brunstatt in Alsatia), though unfortunately known only from female 
specimens, shows that the genus was represented by many more forms 
during the Tertiary than at the present time. Mayr in his „Vorläufige 
Studien über die Radoboj -Formiciden“ published in 1867 states that 
Oe. obesa radobojana cannot be distinguished from the recent smaragdina, 
but he does not regard these forms as identical. 
Tribe Prenolepidini Forel. 
Genus Prenolepis Mayr. 
Prenolepis henschei Mayr. (Fig. 57.) 
Prenolepis Henschei Mayr, Beitr. Naturk. Preuss. I, 1868, p. 34, Taf. I, Fig. 14 — 17, 
P. henschei Dalla Torre, Catalog. Hymen. VII, 1893, p. 178; Ern. Andre, Bull. Soc. 
Zool. France, XX, 1895, p. 82, Handlirsch, Foss. Insekt. 1908, p. 860. 
Mayr gave a very careful description of the worker and male 
of this ant. The worker is readily recognized by its pilosity which 
