82 
Psyche 
[June-Sept. 
concave below with an anteriorly projecting ventral tu- 
bercle; from above the petiole is longer than broad while 
the first gastric segment is broader than long. The sting 
is massive and protuberant. Sculpturing similar except 
for a greater tendency towards longitudinal vermiculations 
instead of reticulations. Color a darker brown without a 
reddish cast except on the appendages. 
Described from one dealate female and one worker, taken 
August 4 (No. 534) and July 29 (No. 358) 1938, respec- 
tively, on Barro Colorado Island, Panama Canal Zone by 
Mr. E. C. Williams, Jr. 
This species appears close to A. mus Santschi also from 
Panama but comparing with Santschi’s original description 
the following differences are marked : the groove extending 
back from the impression between the frontal lobes is en- 
tirely lacking in panamensis, the scapes surpass the occiput, 
the mandibles are entirely striate except on the cutting mar- 
gin instead of striate only at the base, the petiole is distinctly 
longer than broad instead of as broad as long, the postpetiole 
is distinctly broader than long and the size is smaller. It is 
much smaller than A. bufonis Mann of Mexico and lacks a 
meso-epinotal impression. Both simulans Emery of Costa 
Rica and emeryi Forel of Colombia have the occiput concave 
and simulans has also a clypeus convex in profile, the man- 
dibles more massive, the epinotal spiracles lower and less 
protuberant, the petiole dorso-posteriorly not produced, the 
eyes smaller; simulans is also much larger. A. minuta 
Emery of Bolivia is larger, has shorter antennal scapes, and 
the frontal impression is not noted in the original descrip- 
tion. 
Alfaria carinata, sp. nov. (Fig. 3) 
Female (Dealate). Length 3.5 mm. (thorax, including a 
short collar, 1.4 mm.). Head, excluding mandibles, in front 
view broadest back of eyes, slightly longer than broad ; occi- 
pital margin straight, corners slightly rounded, ventral 
angles produced as distinct carinate lobes on each side of 
the thoracic neck ; anterior clypeal margin truncate ; anten- 
nal scrobes in the form of a smooth, broad impression which 
is delimited laterally by a distinct, acute carina that curves 
medially in front of eyes; frontal lobes extending to the 
