1978] 
Kugler — Myrmicine Sting Apparatus 
251 
Oblong plate: Posterior arm with narrow, well sclerotized apo- 
derne, body widens abruptly just caudad of articulation with fuicral 
arm, a lightly sclerotized ventral ridge arcs from intervalvifer 
articulation to opposite fuicral arm. Anterior apodeme wide, promi- 
nent, bluntly rounded. Ventral arm wide, broadly spindle-shaped 
fuicral arm meets posterior arm perpendicularly, postincision deep. 
Gonostylus: Two-segmented as indicated by bimodal sensilla 
pattern and ill-defined membranous region; evenly tapered to end, 
neither long and slender nor short and wide, not strongly dorso- 
ventrally compressed. Distal segment with 7 long setae and isolated 
dorsoterminal chaeta; proximal segment with 10 setae of varied 
lengths. Distal segment grades evenly into terminal membrane. No 
distal notch or basiconic sensilla. 
Triangular plate: Body wide, basal portion abruptly tapered; 
ventroapical process a distinct extension from body, narrowly 
rounded apically. Dorsal and medial tubercles present. 
Lancet: (Fig. 2) Straight, acute, well sclerotized, with distinct 
ventral ridge and, distally, a dorsal ridge. Each lancet with 2 valves 
of moderate size; the caudal one smaller, less sclerotized. No barbs 
present. 
Sting: (Figs. 3, 4) Long, slender, well sclerotized; sting bulb, valve 
chamber and sting shaft regions distinguishable in profile. Sting 
base not arched, anterolateral processes present. Valve chamber 
internally much lower than sting bulb. Sting shaft with distinct 
hemocoel throughout length, height of hemocoel greater apically 
than subapically. No terminal flange. Campaniform sensilla present 
on sting shaft and distal 2/3 of valve chamber. Index of reduction 
26.8. 
Furcula: (Figs. 3, 4) T-shaped in anterior view, lateral arms wrap 
around sting base, dorsal arm well developed. 
Discussion 
The sting apparatus of Eutetramorium mocquerysi seems most 
closely related to those of the Tetramoriini and the Leptothorax 
genus group (see Kugler, 1978). Some common characters are: the 
wide anterior apodeme and overall shape of the spiracular plate 
(Fig. 57); the medial and lateral lobes, and shape of the anterodorsal 
corner of the quadrate plate (Fig. 58); the shape of the anterior 
apodeme, ventral ridge and body of the posterior arm of the oblong 
