176 
Psyche 
[December 
Macromischa barbouri sp. nov. 
Worker. Length 4 mm. 
Head (without mandibles) about % longer than broad, 
suboval, with rounded posterior corners, broader behind, 
sides convex. Eyes rather large, oval, situated at the mid- 
dle of the sides of the head. Mandibles with five distinct 
teeth. Clypeus convex, with a distinct short and narrow 
longitudinal carina. Frontal carinae short. Antennae 
somewhat stout, scapes strongly curved at base, surpassing 
the occipital corners; first funicular joint as long as the 
two succeeding joints, joint two larger than broad, joints 
3-7 slightly transverse. Club 3- jointed, well defined, last 
joint about as long as the two preceding together. 
Thorax stout, less than twice as long as broad, humeri of 
pronotum large, with rounded angles. No thoracic sutures. 
Epinotal spines slender, divergent, almost straight, slightly 
curved downward, about 3.5 times as long as their distance 
apart at base. 
Pedicel long and slender, about as long as the epinotal 
spines, and three times as long as the node ; acutely toothed 
antero-ventrally. Node in profile about twice as high as 
long, compressed antero-posteriorly, anterior surface mod- 
erately convex, posterior flat ; from above two and one-half 
times broader than long; the upper border twice as broad 
as the base. Post-petiole in profile decidedly longer than 
the petiolar node ; anterior surface straight, broadly 
rounded; from above sub-campanulate, about 11/5 times 
as broad as long. Gaster with the first segment slightly 
longer than broad. 
Legs stout, femora strongly swollen at the middle ; tibiae 
rather incrassated. 
Thorax, gaster and appendages very shiny; head mod- 
erately so. Mandibles and clypeus coarsely, longitudinally 
striated. Head minutely and densely punctate, with sinu- 
ous longitudinal, interrupted rugae. Thorax coarsely 
rugose, the rugae being transversely irregularly sinuous on 
dorsum, longitudinally sinuous on pleurae, and transverse 
