25 
March, 1885.] histo ocmn OF WISCONSIN. 
remaining portion of the thoracic, fwfth which they are separated 
by a well-marked constriction; the part of the thorax posterior 
to this constriction is highest in the middle, and slants off to 
form the narrow pedicle by which it is united to the abdomen. 
The cephalic and anterior thoraoic parte axe jet black and 
glabrous; the posterior thoracic part is pale yellow. 
The quadrangle of the wider behind than long. Ihc 
eyes of the first row ar< v«-ry large and almost touching; the 
second row is just behind the first . A st ra igh t line passing back¬ 
ward from the outer edge of the first would cut the second 
through the middle, j hrough the small eye of the third row j 
and then pass inside the dorsal, or fourth eye. 
The width of the clypem is a little less than the radius of the 
anterior eyes. It is black, retreating, and is ridged above. 
The palpus is black, long and slender, having on the outer 
side of the tibia a stout apophysis. 
The falces are robust, narrowing toward the tip; the fang is 
as long as the palpus, slender, and yellowish black in color. 
The maxillx are also yellowish black, halt as long as the 
palpus, more than twice as long as the labium, and widest at the 
extremity. 
The sternum is yellowish, long, truncated in front, narrowing 
fo a point behind. 
The relative length of the legs is 4, 3, 1, 2. The patella, tibia, 
and metatarsus of the first pair are black on the inner side; other¬ 
wise all the legs are yellowish, with a darker coloring toward the 
distal end of the fourth pair. There are weak tibial and metatar¬ 
sal spines on the first pair; the second, third, and fourth pairs 
are unarmed. 
The abdomen consists of three portions, the anteiioi paid be 
iftg joined to the posterior by a narrow neck. The anteiioi is 
hvice as long as the middle, and half as long as posterior part. 
Habitat. Guatemala. 
Observations: This species was found running on the ground 
among a number of leaf-cutting ants. 
