80 
Psyche 
[June-Sept. 
evenly rounded right angle, the epinotum descending in an 
even convexity without teeth or tubercles; from above the 
thorax is seven-tenths longer than wide, being widest at 
the pronotum. Petiole distinctly pedunculate, the node in 
profile rounded-conic and from above transversely ellipti- 
cal, being slightly wider than long, ventral surface of petiole 
with a feeble angular lamina medially, first gastric segment 
higher and broader than long, the anterior margin truncate, 
the sides convex, second segment longer than high, remain- 
ing gastric segments directed anteriorly. Legs of moderate 
proportions. 
Sculpturing largely hidden by pilosity so that the ant 
seems dull except under intense light and moderately high 
magnification. Head, thorax, petiole and first gastric seg- 
ment densely and deeply punctate. Pronotum, petiole and 
first gastric segment slightly punctate-vermiculate. Epi- 
notal declivity on either side with a row of tiny tubercles. 
Second gastric segment sub-lucid, nearly smooth. Mandibles 
coarsely striate. 
Pilosity of abundant short, fine, yellowish hairs, partly 
upright, mostly reclinate. 
Dull brownish-red. 
Allotype (Ergatotype) : One worker taken by Mr. E. C. 
Williams, Jr., July 31, 1938 (No. 1410) on Barro Colorado 
Island, Panama Canal Zone. This worker agrees well with 
Borgmeier’s recent (1937) description of a winged female 
from the Chilibrillo Caves in Panama except for the usual 
sexual differences. The female is 3 mm. long, has much 
larger eyes and the clypeal lamina is seemingly more pro- 
jecting. 
This species differs from the South American S. microm- 
mata, according to Roger’s original description, in smaller 
size, appendages being concolorous with the body, much 
denser pilosity, and in coarser sculpturing. It differs mark- 
edly from S. pergandei Emery of the United States especially 
in having the petiole clearly pedunculate. 
Alfaria panamensis, sp. nov. 
Female (Dealate) . Length 3.2 mm. (thorax, including col- 
lar, 1.34 mm.) Head, excluding mandibles, distinctly longer 
