72 
Psyche 
[March 
I refer to this species a worker from Agudos, Sao Paulo State, 
Brazil (W. W. Kempf leg.) with head length (HL) 0.71 mm, head 
width (HW) 0.63 mm. In habitus, this worker is like a small 
specimen of T. rogenhoferi , but the short, pusillus- like petiolar node 
separates it at once. It is distinguished from pusillus by its larger size 
and longer antennae, the scapes of which reach or surpass the occipital 
border when they are held straight back. The cephalic striation is 
also coarser and more distinct than in pusillus. 
A female from Petropolis, Guanabara, Brazil (T. Borgmeier 
leg.), apparently belonging to this species, has HL 0.76 and HW 
0.65. As has already been indicated, the female described by Santschi 
as T. foreli may belong to T. major. 
Typhlomyrmex prolatus species nov. (Figure 6) 
Diagnosis (gyne) : A medium-sized Typhlojnyrmex with unusually 
elongate, narrowly subtriangular mandibles; basal border short and 
curving broadly into long, indistinctly denticulate masticatory border 
(Fig. 6) ; apical tooth very long and acute. Petiolar node as seen 
from above broader than long, with feebly concave (almost straight) 
anterior border and strongly concave posterior border. Postpetiole 
with a distinct, sharp median longitudinal carina on the anterior third 
of its dorsal surface. 
Holotype gyne, further description: Total outstretched length 
(TL) 3.8 mm, head length (HL) 0.72, head width without eyes 
(HW) 0.63, in full-face view, closed mandibles extend beyond 
median clypeal margin (ML) 0.31, straight-line length of right 
mandible from external point of insertion to apex 0.49, length of 
alitrunk (WL) 1.13, scape length 0.52, greatest diameter of eye 0.18, 
petiolar node length in dorsal view 0.20, width 0.33 mm. Cephalic 
index (HW/HL X 100) 88. 
Head with parallel, feebly convex sides; occipital border with a 
shallow v-shaped concavity. Eyes feebly convex. Clypeus with the 
raised median area very smooth, with a broad strip hairless. Mandibles 
smooth, with small elongate punctures, becoming striatopunctate and 
opaque laterally toward insertions. Antennal scapes just barely reach- 
ing occipital margin in full-face view when held straight back from 
insertions ; antennal club rather distinctly 3-segmented ; flagellar 
segments 2-8 broader than long. Median furrow distinct, reaching 
anterior ocellus. Ocelli small but distinct. 
Remainder of body much as in other species. Middle and hind 
tibiae each with a single simple calcar. Forewing as in T. rogenhoferi , 
but M forking from Cu even farther back toward wing base. In hind 
wing, there is only a single large cell. 
