26 Journal New York Entomological Society. [VoI. xvii. 



tral spine, and with flattened, vertical anterior and posterior surfaces and horizontal 

 dorsal surface to the node. Seen from behind the node is evenly rounded on the 

 sides and above. Gaster rather short, convex dorsally, with subequal first and second 

 segments. Legs rather long. 



Subopaque ; mandibles densely and finely striated and sparsely punctate. Cly- 

 peus and upper surface of head coarsely rugose and covered with gross foveas which 

 often lie in rows between the rugae. The latter are longitudinal on the clypeus and 

 front, but transverse on the occiput. Cheeks opaque, granular, with smaller and more 

 scattered fove^e. Thorax and coxae granular, the former transversely rugulose with 

 scattered fovea; like those on cheeks. Petiole a little smoother and more shining, 

 with shallower fovea. Gaster coarsely shagreened and sparsely punctate, the first 

 segment arcuately and finely rugulose. 



Hairs fulvous, short, erect ; scattered on the body, somewhat more conspicuous 

 on the legs and antennal scapes. 



Piceous black ; mandibles, maxillce, tip of gaster, antennre and legs, including 

 the coxae, reddish. 



Male. — Length ii mm. 



Head, including the eyes, about as long as broad, rounded behind, without any 

 traces of the posterior angles or postocular crest. Mandibles well-developed, similar 

 to those of the worker. Antennae long and slender, scapes fully two thirds as long 

 as the second funicular joint, first funicular joint as long as broad ; joints 2-12 

 elongate, gradually diminishing in length distally. Pronotum with prominent infero- 

 lateral spines like the worker. Mesonotum and scutellum convex ; epinotum flattened 

 as in the worker. Petiole about two and one half times as long as broad, but little 

 narrower in front than behind, with jirominent ventral spine and anterosuperior angles 

 and a low, rounded node. Gaster more slender than that of worker. Legs long 

 and slender. 



Opaque ; mandibles finely and densely striated. Head and clypeus reticulate- 

 rugulose throughout, the former foveolate posteriorly. Pronotal sculpture like that of 

 the worker. Remainder of thorax more coarsely reticulate-rugose than the head, rugae 

 on base of epinotum longitudinal. Petiole and gaster somewhat shining, shagreened. 



Pilosity and color as in the worker, posterior gastric segments broadly yellow at 

 the base. Wings infuscated, with black stigma. 



Six workers and two males, taken from a "small, red mound in 

 clay soil. Digging disclosed a mass of small twigs or pieces of sticks, 

 apparently arranged in order and covered and intermixed with clay to 

 produce a regular formation, possibly for roofing or giving stability. 

 Slaters [land Isopods] were found in the chambers with the ants, also 

 a few workers of white ants." 



This species, which is allied to E. scabrum Mayr, mayri Emery 

 and cristatum Mayr, was based on workers from Charters Towers, 

 Queensland (Forel, Ann. Soc. Ent. Belg., XXXVIII, 1894, p. 236). 



2. Ectatomma (Rhytidoponera) metallicum F. Smith. 



Eight workers and a male. According to Mr. Rawsey, the sting 



