258 Psyche [December 
3. Postpetiole large and convex, its dorsum smooth and shining; 
larger, more robust species (Costa Rica) consanii Brown 
Postpetiole small, its dorsum densely punctulate and opaque; 
smaller, more slender species (s. Mexico to se. Brazil and Bolivia) 
elongata Roger 
4. First segment of gaster margined for its full length on each side 
by a strong, raised dorsolateral carina (Costa Rica to Colombia) 
marginiven.tr is Santschi 
First gastric segment smoothly rounded dorsolaterally, without 
raised margins apart from the basal costulae 5. 
5. Larger species with very long mandibles; combined length of 
head + mandibles > i.iomm (Panama) .... longispinosd Brown 
Smaller species with mandibles not so long; combined length of 
head + mandibles < i.iomm 6. 
6. Compound eye anteriorly detached, i.e., bounded in front by a 
narrow cleft or notch in the ventrolateral margin of the head 
(Fig. 29) ; combined length of head + mandibles > 0.80 mm; 
2 preapical teeth on each mandible, the distal being smallest 
(Figs. 16, 17) (West Indies, Trinidad, British Guiana, intro- 
duced from Africa) rogeri Emery 
No preocular notch in ventrolateral border of head; combined 
length of head + mandibles < 0.80 mm 7. 
7. Each mandible with a single preapical tooth ; no minute denticle 
near mandibular midlength (Trinidad to se. Brazil) 
perparva Brown 
In addition to the preapical tooth, each mandible bears a minute 
denticle somewhere near the midlength of its inner margin 8. 
8. Mandibles (MI 54-61), scape (L0.23 mm) and apical funicular 
segment (L ca. 0.22 mm) shorter; promesonotum with a distinct 
median longitudinal carina (Dutch Guiana) 
carinithorax Borgmeier 
Mandibles (MI >61), scape (L > 0.27 mm) and apical funi- 
cular segment (L > 0.25 mm) longer; no distinct carina in the 
middle of the promesonotum (se. Brazil) schmalzi Emery 
9. Mandible with no preapical teeth, or with a single preapical 
tooth or denticle, or with a preapical tooth or denticle plus another 
minute denticle proximal to it (Figs. 1-4, 7, 8, 12, 13) 10. 
Mandible with 2 well-developed preapical teeth (Figs. 9, 14). 
22 . 
to. Mandible without preapical teeth or denticles (Fig. 2) 11. 
Mandible with a preapical tooth or denticle, or both (Figs. 3, 4, 
7, 8, 12, 13, 15) 12. 
11. Petiole claviform, the node only feebly differentiated from its 
