1940] 
Rare Ponerine Genera 
79 
ventrum; second gastric segment more massive than first; 
terminal segments retracted, directed forward and down- 
ward; sting fine, exserted. Legs of moderate proportions, 
slender. 
Integument opaque, even, covered with fine punctations 
between which are microscopic punctulations ; punctations 
much shallower on the sub-lucid gaster. 
Pilosity of a fine, whitish appressed pubescence. Color 
light reddish-brown. 
Holotype: one dealate female taken July 25, 1938 by Mr. 
E. C. Williams, Jr., on Barro Colorado Island, Panama Canal 
Zone (No. 139 (447) ). 
This species runs to couplet 2 (D. horni) in my recent 
key (Weber, 1939) to the neotropical members of the genus. 
It is separated from horni by the distinctly tuberculate epi- 
notum and in having the node not sharply angulate above. 
The other 9-jointed neotropical species, D. testacea, is much 
larger. It is interesting that this species should occur on 
the same island of six square miles as D. humilis which I 
found in the previous month. Aside from having 9- instead 
of 7-jointed antennae this species is appreciably more mas- 
sive, has a differently shaped petiole and is distinctly darker. 
Sysphincta cavernicola Borgmeier (Fig. 2) 
Worker ( Undescribed ) . Length 2.4 mm. (thorax 0.78 mm.) . 
Head in front view (excluding mandibles) less than one- 
tenth longer than wide, occipital border faintly emarginate 
medially, sides convex, anterior clypeal margin produced 
as a small pair of lobes with a minute tooth between; eyes 
very small, seemingly of one facet, situated in front of 
middle; insertions of antennal scapes projecting in front 
of frontal carinse to anterior margin of clypeus, frontal 
carinse small and short, almost vertical, fused together into 
a lobe over half as thick as high; antennal scapes short, 
stout and curved, extending barely a third their length be- 
yond the eye level; funicular joints 2-10 strongly trans- 
verse, terminal joint slightly longer than the preceding four 
taken together; mandibles trigonal with four coarse teeth 
of which the apical is distinctly the largest. Thorax in pro- 
file without trace of sutures, the pronotum forming an 
