40 William Morton Wheeler 



ein erhebliches Merkmal anzugeben, wodurch beide Arten von einander 

 zu trennen waren, obschon ich andererseits iiicht behaupten mochte, 

 dafi beide gar nicht von einander abweichen " Comparison of the 

 worker atavia with that of coarctata shows that the latter has a longer 

 head, with the eyes placed further back and the antennae with much 

 shorter basal funicular joints; the mesonotum is of a different shape, 

 the epinotum shorter and the sides of its base are not marginate. 

 In certain particulars, especially in the structure of the thorax and 

 antennae, the amber Ponera resembles much more closely P. confinis 

 Roger of India, Burma and Sumatra and P. eduardi Forel of the 

 Mediterranean region. Mayr called attention to the fact that the male 

 of P. atavia is unlike that of P. coarctata in possessing MAYRian furrows 

 on the mesonotum. 



In addition to the worker specimen described above I have 

 examined the following females in the Geolog. Inst. Koenigsberg Coll.: 

 No. 203/3855 (Mayr's type), 103/14, B 18 331, and three specimens 

 without numbers; the following males: 621/10108 (Mayr's type), B 4502, 

 B 18442, XXB48, B 18460, XXB 2139, B 19815, XXB 1598, 

 QB 247, and nine specimens without numbers, and five males in the 

 Klebs Coll.: K 3537, K 5252, K 5238, K 7530 and K 5173, the last 

 comprising two specimens in the same block of amber. Thus I have 

 seen twenty-nine specimens of this species, including the worker. The 

 female specimen B 18 331 is embedded with a small worker oi Lasius 

 schiefferdeckeri Mayr. 



Fonerhice incertae sedis. 



Fonei'a gracilicornis Mayr. 

 Mayr, Beitr. Naturk. Preuss. I, 1868, p. 72, nota, J; Dalla Torre, Catalog. 

 Hymen. VII, 1893, p. 39; Handlirsoh, Foss. Insekt. 1908, p. 879. 



Mayr's description of this species based on a single worker 

 specimen from the Menge Coll., is too brief to admit of the deter- 

 mination of the genus to which it belongs. That it is not a Ponera 

 is show by its great size (10,5 mm). I am unable to recognize it among 

 the material sent me by Professors Klebs and Tornquist. 



Subfamily MyrmicincB Mayr. 

 Tribe Pseudomyrmini Emery. 



Genus Sima Roger. 



The occurrence of five species of this genus in the Baltic amber 

 is of unusual interest, as all the living members of the genus are 



