MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 299 



4. Lobe of cljT^eus broader than long, broad in front and slightly concave at 



middle of border. Length 6.5 mm. (Santa Cruz). . . .truncata Mann. 



Lobe of cljT^eus longer than broad and pointed apically. Length 6.5- 



7 mm. (Solomons) foreli Mann. 



27a. Leptogenys (Lobopelta)diminuta(F. Smith), subsp. santschi, 



subsp. nov. 



Worker. Length 6.25 mm. 



Differing from the tjqjical diminuta in its somewhat more slender habitus 

 and in the following characters: — the mesoepinotal impression is narrower. 

 The mesopleurae are strongly, densely, and accurately striate. The epinotal 

 base is not as rugose as the declivity, which has regular, transverse, and parallel 

 striae, stronger than in diminuta and not interrupted by the lateral tubercles. 

 The latter are much smaller than in diminuta so the declivous surface is broader 

 at the base. The petiolar node is higher in proportion to the length. 



The front of head has arcuate striae as in diminuta. The body, node, and 

 gaster are shining. 



Female. Length 7.5 mm. 



One specimen among a very large series, has the gaster longer and miore 

 enlarged than the others and evidently represents the sexual phase. The 

 petiole is very slightly thinner in profile than in the ordinary workers, but 

 otherwise there is no difference in structure. 



Male. Length 5 mm. 



Head, excluding eyes, longer than broad. ALindibles short and bluntly 

 pointed. Clypeus large and convex, the anterior border slightly concave at 

 middle. Antennal scape more than twice as long as the first funicular joint; 

 second funicular joint three and one half times as long as the first; succeeding 

 joints gradually becoming shorter; terminal joint one and five eighths times 

 as long as the preceding. Eyes and ocelli large and prominent. Prothorax 

 little convfex above. Scutellum longer than broad. Epinotum convex basally, 

 the declivous portion flat. Petiolar node in profile longer than high; seen 

 from above, circular in shape. First and second gastric segments with a 

 strong constriction between. 



Feebly shining; head punctate and finely striolate; the striolae surrounding 

 the ocelli coarser than elsewhere. Thorax rugulosely striate, the striae on 

 apical half of mesothorax converging toward the center; those on scutellum 

 longitudinal and finer. Epinotum granulosely punctate. Petiolar node and 

 gaster finely and sparsely punctate and shining. Femora densely and rather 

 coarsely punctate. Clypeus and legs with semierect pile. 



