250 PROCEEDINGS OF THE ACADEMY OF [Feb., 



on the side of each epinotal spine there is a distinct longitudinal swell- 

 ing or ridge on the epinotum. Petiole veiy slender, three times as 

 long as broad, sides of the node parallel, the peduncle somewhat nar- 

 rower when seen from above; in profile the lower surface is evenly 

 concave, the anterior tooth minute; the dorsal surface with a low 

 regularly rounded, knoll-like node. Postpetiole small, about H 

 times as broad as the petiole, as broad as long, square when seen from 

 above, with prominent anterior angles; in profile the low'er surface is 

 flattened, the upper convex, especially in front. Gaster with distinct 

 anterior angles. Sting well developed. 



Mandibles opaque, striated and with a few coarse punctures. Cly- 

 peus subopaque, its whole surface longitudinalh^ rugose. Head sub- 

 opaque in front and on the sides, shining behind, on the former regions 

 densely and rather finely reticulate-rugose; the ruga? with a distinct 

 longitudinal trend except on an opaque patch above each e^^e, where 

 the rugge are evenly reticulate. The shining portion of the head is 

 traversed by clean-cut longitudinal rugse much farther apart than on 

 the front and crown and interspersed with a few coarse punctures; 

 posterior angles of head delicately reticulate. Thorax subopaque; 

 pronotal region more shining, foveolate-reticulate on the whole dorsal 

 surface; pleurae more coarsely reticulate-rugose, with pronounced 

 longitudinal trend in a few of the rugae, especially in the upper meso- 

 and low^er metapleurse. Petiole and postpetiole subopaque, rather 

 evenly foveolate-reticulate. Gaster smooth and shining. 



Hairs moderately abundant, snoAv-white; clavate on the crown of 

 the head, thorax, pedicel and gaster; a little longer on the pedicel and 

 gaster and somewhat more reclinate. Hairs on the legs and antennae 

 sparse, non-clavate, appressed and inconspicuous. 



Black or very dark-brown. Mandibles, joints 3-9 of the antenna?, 

 neck, ventral surface of petiole and postpetiole reddish-yellow'. Legs 

 reddish-yellow, except the middle of the coxae, femora, tibiae and last 

 tarsal joint, which are black. 



Female. — Length 3.5-3.75 mm. 



Clypeus and head more coarsely longitudinally rugose and more 

 opaque than in the worker. Thorax subopaque; neck delicately 

 reticulate-rugose ; pronotum transversely and irregularly rugose ; meso- 

 notum, paraptera and scutellum traversed by dense, parallel, clean-cut, 

 longitudinal ruga?. Epinotum delicately and somewhat concentrically 

 reticulate-rugose ; armed with two inconspicuous swellings in the place 

 of the spines; pleurae longitudinally rugose. Petiole and postpetiole 

 like those of the worker, the node of the former relatively lower; post- 



