86 William Morton Wheeler. 



D. tertiarius is by far the most abundant species of Dolichoderus 

 in the amber. Mayr studies 87 specimens, Ern. Andre 38. I have 

 seen 369 distributed as follows: 31 workers, 6 females and two males 



in the Klebs Coll. (K 425 K 4266, 

 K 1685, K 4207, K 7537, K 3536, 

 a 170, etc.); 7 workers in the Wm, 

 Haren Coll. (1894, 2412, 2441, etc.) 

 and 339 workers, 18 females and 

 4 males in the Greolog. Inst. Koenigs- 

 berg Coll. (XXB 7131, B 18346, 

 Fig. 39. Dolichoderus (HypocUnea) B 5358, B 5355, XXB 1034, B 19089, 

 tertiarius Mayr. Worker, B 1527. B 18443, B 5490, B 5479, XXB 



412, etc.). In addition to all these 

 specimens I have examined in the same collection the following types 

 of Mayr: 3782/130,3786/134, 3788/136, 3792/140,3846/194,7524/238, 

 7591/305, 7641/355, 7648/362, 7674/388, 7719/433, 8716/466, 8746/496, 

 8751/501, 8764/514, 8768/518, 9778/571. 



It is interesting to note that D. tertiarius is very closely related 

 to the only species of the genus now occurring in the holarctic region, 

 namely D. 4-punctaius L. of Central and Southern Europe, Asia Minor 

 and Siberia, and D. marice Forel, plagiatus Mayr and taschenhergi 

 Mayr of North America. D. sculpturatus, though more heavily 

 sculptured than any of these, also belongs to the same group. 



Dolichoderus (HypocUnea) longipennis Mayr. 



HypocUnea longipennis Mayr, Beitr. Naturk. Preuss. I, 1868, p. 67, Taf. IV, Fig. 65 cT ; 

 Dolichoderus longipennis Forel, Bull. Soc. Vaud. Sc. Nat. (2). XV P80, 1878, p. 386, 



Dalla Torre, Catalog. Hymen. VJI, 1893, p. 159; Handlirsch, Foss. 



Insekt. 1908, p. 869. 

 Mayr based this species on two males, which differed from the 

 males attributed to D. tertiarius mainly in having longer wings and 

 in the more slender antennae. I have seen no specimens of this 

 species either in the Klebs or Geolog. Inst. Koenigsberg Coll. 



Tribe Tapinomini Emery. 

 Genus Iridomyrmex Mayr. 



IHdomyrmex geinitzi (Mayr) (Fig. 40 and 41). 

 HypocUnea Geinitzi Mayr, Beitr. Naturk. Preuss. I, 1868, p. 58, Taf. Ill, Figs. 47 bis 



49, $9cf. 

 Bothriomyrmex geinitzi Dalla Torre, Catalog. Hymen VII, 1893, p. 170; Ern. 



Andre, Bull. Soc. Zool. France XX, 1895, p. 82; Handlirsch, Foss. 



Insekt. 1908 p. 871. 



