452 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
135. Daceton armigerum (Latreille). 
There were several colonies of this species in the grounds of the 
Zoélogical Garden at Pardé, where workers were often seen on the 
fences and trees. At Itacoatiara I found a very large colony nesting 
in a hollow standing tree. 
136. Acanthognathus ocellatus Mayr. 
Plate 5, fig. 39. 
Female. (Plate 5, fig. 35). Length 3.5 mm. 
Head cordate; excluding mandibles, twice as long as broad, with 
convex sides and deeply excised occiput. Eyes large, convex, situ- 
ated at middle of sides of head. Ocelli small, convex, white in color. 
Clypeus longer than broad, its anterior border truncate. Antennae 
slender and short; the scape not attaining the occipital corners, bent 
and: slightly thickened distally; first funicular joint two and a half 
times as long as broad; joints 3-9 scarcely longer than broad; last 
two much longer than broad, the apical nearly twice the length of 
penultimate. Mandibles nearly as long as head, slender, straight; 
apex with two long subequal teeth and a shorter tooth. On the inner 
side near the base is a curved process, which extends upward a little 
past the base. This is bidentate at apex. Pronotum very narrow; 
in profile flat. Mesonotum evenly rounded above and at sides. 
Scutellum rounded. Epinotum with base and declivity subequal in 
length, the angle bearing a pair of stout, acute spines. Petiole elon- 
gate, slender, the node globular. Postpetiole subglobose, about as 
large as the petiolar node. Gaster short and thick. 
Head in front somewhat shining; genae and occiput smooth and 
shining. Mandibles finely punctate. Antennae and thorax sub- 
opaque, the latter coarsely, rugosely punctate. Scutellum with five 
feeble longitudinal carinae. Petiole, postpetiole, gaster, and legs 
finely punctate, shining. 
Front of head and occiput, thorax, petiole, postpetiole, gaster, 
legs, and antennal scapes pilose. 
Color ferruginous; the front of head, thorax, and gaster darkest, 
legs lightest. 
Described from one female which was found with a solitary worker 
beneath a board on the ground at Para. 
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