120 
William Morton Wheeler 
JPrenolepis pygmcea Mayr. 
Prenolepis pygmcea Mayr, Beitr. Naturk. Preuss. I, 1868, p. 36, Taf. I, Fig. 18 $ cf ; 
Dalla Torre, Catalog. Hymen. VII, 1893, p. 180; Ern. Andre, Bull. 
Soc. Zool. France, XX, 1895, p. 82; Handlirsch, Foss. Insekt. 1908 p. 860. 
The male and female of this species are known and I have been 
no more successful than Mayr in discovering the worker phase. The 
winged phases are easily distinguished from those of P. henschei by 
their smaller size, the shape of the petiole and the pilosity. The male 
measures only 1,5 — 1,7 mm, the female less than 3 mm. Mayr gives 
„vix 4 mm“ for this phase, but the type in the Geolog. Inst. Koenigs- 
berg Coli, is certainly smaller thongh its body is curled np and in 
an oblique position and therefore difficult to measure. The hairs on 
the body are much shorter than in henschei , especially on the legs 
and scapes, the petiole of the female is high and erect and com- 
pressed anteroposteriorly, and its rounded border is emarginate in the 
middle. In the male the petiole is somewhat inclined forward, 
but less than in henschei and has a straight, transverse and entire 
upper border. 
I have seen 49 specimens of P. pygmcea ; 33 males and 2 females 
in the Geolog. Inst. Koenigsberg Coli. (B 5080, XXB 4643, B5100, 
XXB 713, XXB 1202, B 18598, XXB 282, 14375/1016, 11058/82 6, etc ), 
six males in the Klebs Coli. («191, «176, «143, «2 39) and 8 males 
in the Haren Coli. (473, 1452, 1875, 2429). In all of these collections 
single pieces of amber containing 2 — 4 males are rather common. In 
addition to these I have studied the single gynetype (10235/628) and 
10 of the 11 androtypes cited by Mayr from the Phys.-Oec. Soc. Coli, 
(now the Geolog. Inst. Koenigsberg Coli.). 
Tribe Formicini Forel. 
Genus Lasius Mayr. 
Lasius schieff er deckeri Mayr. (Fig. 58.) 
Lasius schiefer deckeri Mayr, Beitr. Naturk. Preuss. I. 1868, p. 44, Taf. I, Fig. 2, Taf. II, 
Fig. 27-32, £ 9 cf. 
L. schiefer deckeri Dalla Torre, Catalog. Hymen. VII, 1893, p. 191; Ern. Andre, 
Bull. Soc. Zool. France, XX, 1895, p. 82; Handlirsch, Foss. Insekt. 
1908 p. 861. 
All three phases of this ant were carefully described and figured 
by Mayr. Like Iridomyrmex goepperti, 1. geinitzi , Prenolepis henschei 
and Formica flori, it is one of the most abundant ants of the amber. 
Mayr examined 174 specimens, Ern. Andre 96. I have seen 902 
which are distributed as follows: 755 workers, 14 females and 13 males 
in the Geolog. Inst. Koenigsberg Coli. (B 19389, B 18839, XXB 348, 
