The Ant8 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 number and confined 

 to the mandibles and tip of the gaster. There are traces of short 

 sparse pubescence on the scapes, pronotum and gaster. 



Color brown; legs sUghtly paler. 



Described from a single specimen (B 18 730) in the Geolog, Inst. 

 Koenigsberg Coll. 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 antennae leave no doubt that it is a true (EcopJiylla. 



Besides (E. brischkei and brevinodis a third species of (Eco})hyUu 

 is known from the Sicilian amber, namely ffi". sicula Emery. This 

 form closely approaches the recent (E. smaragdina in having very long, 

 thin legs and antennae. 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, antennae, petiole, mesoepinotal con- 

 striction etc.: brevinodis, brischkei, sicula and smaragdina, the last 

 being the most specialized, while sicida of the upper Miocene, is more 

 recent geologically than the Baltic amber species and therefore most 

 nearly related to the recent form. The occurence of three other species 

 of (Ecophylla in the Miocene shales of Europe {Gil', obesa radobojana Heer 

 and an unnamed species at Radoboj in Croatia and Oe. prccclara Forster 

 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 „Vorlaufige 

 Studien iiber 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. 



Frenolepis henschei Mayr. (Fig. 57.) 



Prenolepis Henschei Mayr, Beitr. Naturk. Preuss. I, 1868, p. 34, Taf. I, Fig. 14—17. ^(f. 



P. henschei Dam. A Torre, Catalog. Hymen. VII, 181)3, p. 178; Krn. Andkk. Hull. Soc. 



Zool. France, XX, 1895, p. 82, Hanoi, iksch. Fobs. Insekt. 1008, p. 800. 



Mayr gave a very careful description of the worker and male 

 of this ant. The worker is readily recognized by its pilosity which 



