118 
William Morton Wheeler 
resembles that of the worker, the hairs on the head, thorax and gaster 
being long, erect and coarse, and by the shape of the petiole, the node 
of which is inclined forward as in the worker. The male P. henschei 
can be distinguished by this latter character and the absence of the 
discal cell of the fore wing from the otherwise very similar male of 
Lasius schieff er decken. 
I believe that I have fonnd the female of P. henschei. It measnres 
3,5 mm in length and has the coarse pilosity of the worker, although 
the hairs are shorter, especially on the gaster. The petiole is shaped 
like that of the worker 
and the wings, which have 
the same nenration as 
those of the male, are 
brownish, while the body 
is dark brown or black 
as in the females of many 
of the recent species. 
P. henschei is one 
of the commonest ants 
in the amber. Mayr 
examined 69 specimens, 
Ern. Andre 18. Besides 
32 of the 36 specimens, 
including th e single andro- 
type, recorded by Mayr as 
preserved in the Geolog. 
Inst. Koenigsberg Coli., 
I have examined 524 spe- 
cimens. These are distrib- 
nted as follows : 398 
workers, 17 males, 10 fe- 
males and one pseudo- 
gyne in the Geolog. Inst. 
Koenigsberg Coli. (XXB 
38, B 18 720, B 19338, 
B 18742, XXB 877, XXB 
763, XXB 1351, B 18689, 
XXB 1082, B 19127, B 19 392, B 18494, XXB 252, 10309/657, B 18 643, 
XXB 1572, 10249/642, XXB 1455, XIIIB 904, XXB 5202 etc.), 
71 workers, 6 males and one pseudogyne in the Klebs Coli. (K 2653, 
K 2640, K 881, K 851, K 4043, K 2615, K 4247, K 922, «1, K 872, 
Fig. 57. Prenolepis henschei Mayr. 
a) normal worker, K 2647 ; b) pseudogyne, K 868. 
