26 
William Morton Wheeler 
Fig. 1. Prion omyrmex longiceps Mayr. Worker, K 5103. 
short on the head, thorax, legs and scapes, somewhat longer on the 
abdomen. Pubescence indistinct, except in one specimen (B 259), in 
which it seems to be abundant but glued to the body by a white film. 
Three specimens in the Klebs Coli. (K 5103, K 1024 and A 129); 
and five in the Geolog. Inst. Koenigsberg Coli. (B 258, B 259, B 14 762, 
and two without numbers). Two of the specimens in the latter Col- 
lection lack the head; of the three others only one possesses ocelli. 
These Organs are also lacking in the specimens from the Klebs Coli. 
As would be expected, Mayr’s ocellate individual and the one I have 
seen are both larger (14 mm) than the nonocellate individuals. 
Prionomyrmex longiceps Mayb. 
Prionomyrmex longiceps Mayr, Beitr. Naturk. Preuß. I, 1868, p. 78, Taf. IV, Figs. 
74, 75, Dalla Torre, Catalog. Hymenopt. VII, 1893, p. 22; Hand- 
lirsch, Fossil. Insekt. 1908, p. 879. 
Worker (Fig. 1). Length 10 — 14 mm. 
First funicular joint of antennse about half as long as the second, 
the second the longest, and the succeeding joints gradually decreasing 
in length to the penultimate, which is a little shorter than the last 
joint. Surface of body smooth, very finely shagreened, but not 
punctate or rugulose. Hairs moderately abundant, erect or suberect, 
