MANN: ANTS OF THE BUITISII SOLOMON ISLANDS. 331 



Solcnop-fif, (lahll Ford and nia.rillo.sa Emery are similar to cJrpti.s, hut 

 the latter is distinct in ha\ing the antennal scapes much shorter and 

 in the bisinuate ventral surface of the petiole. 



62. Oligomyrmex atomus Emery. 

 Term, fuzet., 1900, 23, p. 328, pi. 7, fig. 30, %. 

 Female (dealated). Length 2.75 mm. 



Form long and slender. Head about a fourth longer than broad, occipital 

 border less concave than in worker and unarmed. Ocelli large. Eyes large 

 and but little convex, situated at sides of head at a distance of less than half 

 their length from anterior margins. Thorax flat above, slender. Epinotura 

 without distinct base and declivity, flattened, unarmed. Petiole and post- 

 petiole as in soldier. Gaster subcylindrical, three times as long as broad. 



Sculpture of head as in worker. Thorax and epinotum shining, sparsely 

 though rather coarsely punctate. Petiole and postpetiole rather densely 

 punctate. Gaster finelj- and regularly punctate. 



Color reddish brown; appendages lighter. 



Ysabel: Fulakora. 



Several colonies of this minute species were found in rotten wood. 

 The soldiers agree closely with Emery's description but the occipital 

 border is rather more deeply concave and the mandibular teeth larger 

 and more regular than shown in Emery's figure. The color is darker 

 and comparison with specimens from New Guinea may show the 

 Solomon Island specimens to be different. 



63. Oligomyrmex viehmeyeri, sp. nov. 



Soldier. Length, 2.50 mm. 



Head about a third longer than broad, with subparallel sides and broadly 

 rounded occipital corners; occipital border strongly concave at middle, upper 

 borders of concavity armed with short denticulate processes. Mandibles 

 with four stout teeth and two smaller ones. Basal portion of clypeus flat and 

 separated by an angle from the anterior part which is slightlj^ concave, anterior 

 border broadlj' rounded. Frontal area large, triangular. Antennal scapes 

 flattened basally, extending less than half the distance to occipital corners; 

 funicular joints three to seven a little broader than long, joints eight and nine 

 about as long as broad; club a little shorter than remainder of funiculus, termi- 



