354 



bulletin: museum of comparative zoology. 



impressed occipital border; sides convex in occipital region, then evenl}^ con- 

 cave to and a little past the eyes, and then convex to the clypeal 

 border. Clypeus flattened at base, acuminate behind; in front excavated 

 broadly and triangularly, so that the sides form rectangular lobes. Antennal 



foveae well defined and margined as far as the eyes, 

 then poorly defined and without margin. Scapes 

 stout, extending less than two thirds the distance to 

 occipital corners, about as long as mandibles; first 

 funicular joint a little longer than the second and 

 third, which are subequal and two and a half times 

 as long as broad; terminal joint rather stout, one 

 and a half times as long as the penultimate. 



Mandibles long and arcuate, of equal thickness 

 from base to near apex; the inner border a little 

 before the middle has a small, but distinct triangular 

 tooth and anterior to this a second, smaller tooth; 

 midway between this and the terminal tooth is a 

 slender tooth, more than half as long as the terminal 

 ones; upper terminal teeth long and slender, the 

 lower ones much shorter than the others and strongly 

 twisted. Thorax long and slender, the sutures obso- 

 lete. Promesothorax narrowed anteriorly into a neck, 

 which is feebly margined; broadest behind middle, 

 with convex surface and rounded sides, evenly sloping 

 behind to the epinotiun. Epinotum in profile flattened 

 basally, rounded at sides; armed with two stout trian- 

 gular spines, which are about as long as the very short 

 declivity. Peduncle in profile shorter than the node, 

 which is nearly twice as long as high and feebly convex above; seen from above 

 more than twice as long as broad, the sides subparallel to near the apex, then 

 divergent. Postpetiole from above a little broader than long, campanulate in 

 shape, broadest behind, narrowed in front, rounded above and at sides. Gastcr 

 sliort and stout. Legs Ions and slender. 



Fig. 32. — Strumigenys de- 

 collata Mann. Worker 

 Front view of head. 



Fig. 33. — Strumigenys decollata Mann. Worker. 



Mandibles shining, finely punctate. Clypeus shining, with scattered 

 punctures. Head feebly shining, densely and reticulately punctate; vertex 

 more finely than the rest. Thorax more shining, with widely separated, 

 strong punctures. Base of epinotum smooth and very shining. Petiole 



