1965] 
Brown — Typhlomyrmecini 
77 
= robustus manco Wheeler 
= Centromyrmex sculpturatus Santschi, n. syn. 
Note: Brown (1953) cited Prionopelta marthae Forel as a syno- 
nym of Typhlomyrmex rogenhoferi. The synonymy was based on a 
specimen labeled as a cotype of P. marthae , found in the Wheeler 
Collection, and which is clearly a specimen of T. rogenhoferi. Studies 
in European museums in 1963 and 1964 show that this specimen is 
mislabeled, because P. marthae syntypes (“cotypes”) in the Forel 
Collection and elsewhere are true Prionopelta close to, and possibly 
conspecific with, the species currently called Prionopelta antillana. 
P. marthae must, therefore, be deleted from the synonymy of T. 
rogenhoferi and returned to genus Prionopelta. 
Key to Typhlomyrmex species, workers 
1. Petiolar node longer than high, without a differentiated posterior 
face (Fig. 3) rogenhoferi 
Petiolar node as high as or higher than long, with a differentiated 
posterior face (Fig. 1) 2 
2. Head width <0.55 mm pusillus 
Head width >0.55 mm 3 
3. Mandibles triangular, with basal border fitting tightly against 
clypeus at full closure; apical tooth stout, not notably elongate 
major 
Mandibles more elongate, basal borders oblique and not closing 
up against clypeus; apical tooth notably elongate and very acute 
( Fig. 4) clavicornis 
Note: The worker of T. prolatus, at present unknown, probably 
would key to couplet 3, where it would undoubtedly be dis- 
tinguished from both alternatives by having mandibles like those 
of its gyne (Fig. 6). 
Key to Typhlomyrmex species, gynes 
1. Petiolar node without a differentiated posterior face; size large, 
head width (without eyes) normally >0.85 mm rogenhoferi 
Petiolar node with a differentiated posterior face; size smaller .. 2 
2. Head width (without eyes) <0.58 mm; r-m crossvein missing 
from forewing pusillus 
Head width (without eyes) >0.58 mm; r-m present in forewing 
; 3 
3. Petiolar node as seen from above concave behind; mandibles 
elongate but only weakly denticulate, of a particular form (Fig. 
6) ; postpetiolar disc with a distinct anteromedian longitudinal 
carina prolatus 
