80 Psyche [Sept.-Dee. 
with a brown spot around the ocelli. Prothorax as long as broad, 
not marginated at the sides. Mesothorax with an almost circular 
disc which is a little elevated, separated from the base of the 
epinotum by a wide depression; the latter is longer than broad, 
broadest at the level of the stigmata, and very convex trans- 
versely. The petiole is shaped as in the type ; the postpetiole is 
more transverse. The posterior edge of the first, second and 
third segments are brown, the tip of the gaster and the gaster 
below are brown. The rest of the body is reddish brown, except 
for the brown spot on the occiput. 
Type locality: Ecuador. 
The new form differs from the type arboris-sanctce in colora- 
tion. The type has the anterior edge of the head and the pro- 
thorax light yellow, the mesonotal disc dark brown, and the 
occipital spot very small. The pilosity and pubescence is much 
more developed in the new variety, the eyes are larger and more 
convex. From the other forms of arboris-sanctce the new va- 
riety differs by the characters given in the key. 
Described from 5 workers in the Collection of the Museum 
of Comparative Zoology, labelled Cotype 26809. 
Pseudomyrma belli subsp. bequaerti subsp. nov. 
Worker. 
Length 5-6 mm. Head a little longer than broad with very 
convex sides and straight posterior edge. Mandibles very shiny; 
clypeus with a short broad rectangular lobe in front; scapes 
reaching beyond the middle of the eyes. Eyes very large and 
convex, occupying more than half the sides of the head. Head 
coarsely and evenly punctate, with very sparse erect hairs. 
Prothorax longer than broad, not marginated on the sides. 
Mesothoracic disc triangular with well rounded angles. Epi- 
notum about twice as long as broad. In profile the prothorax is 
slightly convex above, the epinotal base nearly flat; the base 
rounds into the declivity without an angle. 
Petiole from above \y 2 times as long as broad, the node 
broader behind than in front, the posterior edge rounded. Post- 
petiole about as broad as long, twice as broad as the petiole. In 
profile the petiole is 1 J4 times as long as high, with a very short 
peduncle; the node evenly rounded with the posterior face a 
little more abrupt. 
Erect hairs sparse on thorax, pedicel and abdomen. Pubes- 
