470 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Thorax robust, the anterior surface of the pronotum declivous in 
profile. Petiole and gaster similar to those of the worker minor. 
Body and legs without erect pile, sparsely pubescent. Antennae, 
excepting the first two joints, very densely covered with rather long, 
erect pubescence. 
Color black, legs and antennae dark fuscous. Wings hyaline. 
Veins and stigma fuscous. 
Described from four major workers, three minors, and a male from 
Itacoatiara. This form differs from the typical A. schumanni in not 
having erect hairs on the antennal scape, the head is less narrowed 
in front, and the clypeus is not depressed at the middle. Azteca 
schumanni var. taediosa Forel is more robust and has the head less 
excavated behind and the antennal scapes longer. 
173. Azteca miilleri Emery subsp. terminalis, subsp. nov. 
Plate 2) \fige 16: 
Worker major. Length 4 mm. 
Head, excluding mandibles, as broad as long, narrowed in front, 
with strongly convex sides, especially opposite the eyes, narrowly 
rounded occipital corners and deeply excavated border. Clypeus 
convex, the anterior border straight, except at corners, where it is 
slightly produced and rounded. Mandibles thick, with six strong 
teeth. Antennal scapes barely extending to occipital corners. Meso- 
notum in profile evenly rounded. Epinotum with subequal base and 
declivity, the former broadly flattened. Node rather low, rounded 
above. First segment of gaster depressed in middle at base. 
Shining, densely punctate throughout. Pubescence abundant, long 
and recumbent. Pile of the scapes sparse and short, that of the body 
longer. 
Color very dark fuscous; terminal half of antennae yellow, the color , 
becoming more intense at apex. 
Described from a series taken at Madeira-Mamoré R. R. Camp 39. 
The broadly flattened epinotum and the peculiar coloration of the 
antennae distinguish this subspecies. It is evidently close to var. 
A. nigella Emery from southern Brazil, but is larger and differently 
colored. 
174. Azteca aurita Emery subsp. silvae Forel. 
A single colony of this distinct subspecies was found at Para, the 
type locality. 
