MANN: THE ANTS OF BRAZIL. A477 
Petiolar node from above transverse, rounded at sides and in front; 
in profile narrow, two and one half times higher than thick, rounded 
at apex, the posterior surface nearly straight, the anterior slightly 
more convex. Gaster elongate egg-shaped. Legs long and slender. 
Subopaque, the whole body finely shagreened, somewhat more 
coarsely on the head and more finely on the petiolar node. Mandibles 
coarsely punctate and sparsely setose. Antennal funiculus coarsely 
punctate. 
Body with long, recumbent, silky, glistening hairs and very long 
erect pile. The appressed pubescence is most abundant on the 
gaster, thoracic pleurae, and head and absent from the petiolar node. 
Legs with short semidepressed hairs, femora sparsely beset with long 
stiff hairs. Antennal funiculus pubescent; scape with short semi- 
depressed and sparse, longer, erect, stiff hairs. 
Color black except a transverse reddish brown patch on the occiput 
and the dorsum of the gaster, which is light ferruginous. Pubescence 
yellow, pile brown. 
Worker minor. Length 10 mm. 
Head twice as long as broad, as broad in front as behind, with 
slightly convex sides and narrowly rounded occipital border. Anten- 
nal scapes extending nearly two thirds their length past the occipital 
borders. Thorax shaped much as in worker major. Posterior surface 
of petiolar node shallowly impressed at middle. 
Sculpture, pilosity, and color much as in worker, but the head is 
entirely black. 
Described from one worker major and a series of minor workers 
from Porto Velho and Madeira-Mamoré Camps 39 and 41. This 
distinct species is generally distributed throughout the Amazon region 
and the northern parts of South America, but it is not common locally. 
205. Camponotus (Myrmothrix) leydigi Forel. 
Workers were found on tree trunks at Independencia and Manaos. 
206. Camponotus (Myrmothrix) wheeleri, sp. nov. 
Plate 6, fig. 49-51. 
Worker major. (Plate 6, fig. 50). Length 12 mm. 
Head very large, nearly as broad as long, narrowed in front, with 
slightly convex sides, elongate, narrowly rounded occipital corners 
