The Ants of tho Baltic Amber. 
59 
are deepest in the middle of their conrse and fade out towards the 
base and posterior border of the segment. 
Pilosity like that of the worker. 
Color black; wings brownish, witli darker brown veins and stigma. 
Described from five specimens in the Geolog. Inst.. Koenigsberg 
Coli., four workers (No. 639/10246 — Mayr’s type; 679/10331, XXB 540, 
B 5164) and a single female (B 260). All the workers have the body 
curled up so that the peculiar conical tip of the gaster can be seen 
in only one of them. The female, though it has a white film over 
much of the body, shows the structure of the gaster and pedicel and 
the sculpture of the different regions very clearly. The left fore wing 
has a small adventitions cell at the distal end of the second cubitai cell. 
Mayr saw only a single, poorly preserved specimen of this ant 
(No. 639) and was therefore quite unable to appreciate its remarkable 
characters. He overestimated the length of the worker, which he gave 
as about 6 mm, and his Figs. 87 and 88 are quite erroneous as may 
be seen by comparing them with my own. That the species cannot 
be assigned to the genus Myrmica is evident at a glance, and it is 
equally clear that none of the recent genera of Formicidse can be 
made to receive it. In the structure of the head, thorax, petiole and 
postpetiole it closely resembles Triglypliothrix of the Old World tropics, 
but the pilosity, venation and especially the structure of the gaster 
remove it from this genus. In the character last mentioned, it is 
unique among the Myrmicince and recalls the gastric structure of the 
small group of Ponerince including the genera Sysphincta , Proceratium, 
Discothyrea, Älfaria, Spaniopone and Bradoponera. 
Genus Myrmica Latreille. 
Myrmica longispinosa Mayr. 
Myrmica longispinosa Mayr, Beitr. Naturk. Preuss. I, 1868, p. 87, Taf. Y, Fig. 86 
Dalla Torre, Catälog. Hymen. VII, 1893, p. 112; Handlirsch, Foss. 
Insekt. 1908, p. 874. 
The only specimens of this species I have seen are Mayr’s single 
type (No. 40/316) and an unnumbered specimen in the Geolog. Inst. 
Koenigsberg Coli. The form er is rather poorly preserved, having the 
body curled up, and in great part enveloped in a white cloud, together 
with a small specimen of Iridomyrmex goepperti. In Mayr’s opinion 
the species is closely related to the recent M. sulcinodis Nyl. of Europe. 
It shows distinctly the pectinated spurs on the middle and hind tibise. 
