260 
Psyche 
[June-Septernber 
plate (Fig. 130)', the subtriangular quadrate plate (Fig. 131)', the long 
slender posterior arm and anterior apodeme and the inclined fulcral 
arm of the oblong plate (Figs. 132, 133)', and the shape of the sting 
bulb, valve chamber and furcula (Figs. 138, 139) are common 
characteristics of the species so far examined in these 3 genera. The 
Oxyopomyrmex species, however, are distinct in two important 
respects: the sting shaft has no dorsal flange (Fig. 138), and the 
lancets are spatulate and broadly rounded apically, rather than 
acute (Fig. 137). 
The close affinities of Oxyopomyrmex, Messor and Aphaeno- 
gaster as suggested by the sting apparatus are consistent with the 
views advanced by Emery (1922) and Wheeler (1910: 139-140, 268; 
1922). 
Terataner 
Species examined: T. alluaudi, 2 workers. 
Spiracular plate: (Fig. 7) Body subrectangular. Anterior apodeme 
narrow, well sclerotized, continues dorsad to make completely 
sclerotized connection with opposite side. Dorsal notch and ventral 
and posterior apodemes present. 
Quadrate plate: (Fig. 8) Apodeme subtriangular, no medial or 
lateral lobes, anterodorsal corner rounded. Body subrectangular, 
extending below apodeme. 
Anal plate: Wider than long, clear suture between plate and anal 
arc; moderately well sclerotized proximally, posterior and lateral 
borders unsclerotized, undefined. Thirty-one long setae cover plate; 
no sensilla basiconica. 
Oblong plate: (Fig. 9) Posterior arm short and straight, dorsal 
ridge strong, ventral ridge weak, ill-defined. Ventral arm wide 
apically with narrow fulcral arm perpendicular to posterior arm; 
postincision deep. Anterior apodeme rather short, acute. 
Gonostylus: One-segmented. Dorsal surface free of sensilla, 
broadly triangular. Lateral surface narrower, uniformly and densely 
covered with long thin setae along distal Vi of length, longest setae 
proximad; small dorsoterminal chaeta embedded among setae; no 
obvious companion seta; no basiconic sensilla. Short terminal 
membrane present. 
Lancet: Long, slender, weak and flagelliform. Two intermediate- 
sized valves per lancet, caudal valve smaller. 
