202 
Psyche 
[June-Septernber 
time, because new species have been discovered (mostly unpub- 
lished) that seem likely to link it with such senior genera as 
Trichoscapa and Codiomyrmex. 
Until more of these new species have been formally described and 
properly analyzed, no firm classification of the short-mandibulate 
strumigenites is practicable. It seems best to retain some of the 
available generic names for now, if only to avoid excessive combina- 
torial changes as the classification develops. 
Accordingly, we retain the name Pentastruma for the time being. 
We figure for the first time the type species, P. sauteri, and 
supplement its original description, and we describe a second 
species, P. canina, from Japan, based on all 3 castes. 
Measurements and proportions, and their abbreviations, are 
those standard in papers on Dacetini, e.g., Brown, 1953, Arner. 
Midi. Nat. 50 : 7 ff., and 1973, Pacific Insects 15 : 259. 
Pentastruma 
> Pentastruma Forel, 1912, Ent. Mitt. 1: 50. Type species: Pentastruma sauteri Forel, 
monobasic. 
Worker: Like Smithistruma in size, and form of head, mandibles 
and remainder of body, including the 6-merous antennae; small 
funicular segments II and II separate and distinct. Clypeus with 
median tumulus and broadly extended anterolateral apron; anterior 
margin concave in outline. Mandibles depressed, porrect, with 
rounded basal lamella and no diastema, up to 15 acute teeth and 
denticles of varying length, including small apical tooth. Labrum 
with 2 long, tapered lobes, as in Smithistruma. 
Body densely reticulate-punctulate and opaque (feebly shining in 
some views), but postpetiolar disc and gaster smooth and shining, 
except for basigastric costulae. Head, trunk, petiole and appendages 
without erect hairs, and even the pubescence reduced to a virtually 
invisible (at 50X) dilute vestiture of minute, appressed to decumbent 
hairs. The under-mouthparts have some small standing hairs. 
Postpetiole and gaster with a few short, blunt-tipped or remiforrn, 
standing hairs, mostly arranged symmetrically. Color testaceous to 
light ferruginous. 
Queen: Like the Smithistruma queen, but with differences cor- 
responding to those of the worker. Thoracic dorsum with a few 
