MANN: THE ANTS OF BRAZIL. 477 



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. 



]]'orker 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-Mamore Camps 39 and 4L 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. 49-5L 



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 



